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1. F10 1 net weight for display F10 2 new setpoint 1 F10 3 new setpoint 2 F10 4 new deadband 1 F10 5 new deadband 2 F10 6 new preact 1 F10 7 new preact 2 F10 8 current setpoint 1 F10 9 current setpoint 2 F10 10 current deadband 1 F10 11 current deadband 2 F10 12 current preact 1 F10 13 Current preact 2 F10 14 19 reserved F10 20 low weight for calibration F10 21 midpoint weight for calibration F10 22 high weight for calibration F10 23 sensitivity for soft calibration F10 24 27 reserved F10 28 reserved F10 29 reserved The ladder logic utility uses symbolic names to identify certain events that occur when a bit is set We list the symbolic names here symbolic names that begin with are an underscore local variables and control bits MMI_ MMI interface bits MOD_CMD_ command bits to the module MOD STS_ status bits from the module Table 3 Symbolic names address symbolic name 001 10 PREACTIINPUTSTATUS 001 11 PREACT2INPUTSTATUS N9 0 0 CS BTW COMMAND N9 0 1 CAL BTW COMMAND N9 0 2 MMI BTW COMMAND N9 1 0 SETPOINTS N9 1 1 TARE N9 1 2 ZERO N9 1 3 HARD CAL N9 1 4 SOFT CAL N9 1 5 C2 CAL Using the Ladder Logic Utility 3 7 address symbolic name
2. word bits description 30 0 15 Setpoint 1 MSW This is the most significant 16 bits of the 32 bit floating point format setpoint 1 value This data is used only when bit 0 of word 29 is on 31 0 15 Setpoint 1 LSW This is the least significant 16 bits of the 32 bit floating point format Setpoint 1 value This data is used only when bit 0 of word 29 is on 32 0 15 Setpoint 2 MSW This is the most significant 16 bits of the 32 bit floating point format setpoint 2 value This data is used only when bit 0 of word 29 is on 33 0 15 Setpoint 2 LSW This is the least significant 16 bits of the 32 bit floating point format setpoint 2 value This data is used only when bit 0 of word 29 is on 34 0 15 Deadband 1 MSW This is the most significant 16 bits of the 32 bit floating point format deadband 1 value This data is used only when bit 0 of word 29 is on 35 0 15 Deadband 1 LSW This is the least significant 16 bits of the 32 bit floating point format deadband 1 value This data is used only when bit 0 of word 29 is on 36 0 15 Deadband 2 MSW This is the most significant 16 bits of the 32 bit floating point format deadband 2 value This data is used only when bit 0 of word 29 is on 37 0 15 Deadband 2 LSW This is the least significant 16 bits of the 32 bit floating point format deadband 2 value This data is used only when bit 0 of word 29 is on 38 0
3. 9 1 6 ACCEPT LOW N9 1 7 _ACCEPT_MID 9 1 8 ACCEPT HIGH N9 1 9 ACCEPT CAL 9 1 10 CANCEL CAL N9 1 11 RESTORE CAL 9 2 0 _SETPOINTS LATCH N92 1 _ CHANGED 9 2 2 _TARE_OK N92 3 ZERO OK 9 2 4 HARD CAL N9 2 5 SOFT CAL 9 2 6 C2 CAL N92 10 EXIT CAL 92 1 MMI ZERO LATCH N9 2 12 _MMILTARE_LATCH 9 2 13 _CS_BTW_CMD LATCH N92 14 CAL 6000 92 15 RESTORE CAL N9 9 1 OD STS PREACT 1 9 9 2 OD STS PREACT 2 N9 12 0 OD CMD TARE 9 121 00 ZERO 9 42 0 OD_CMD_CAL MODE 9 421 OD CMD RESTORE CAL 9 42 2 OD CMD HARD SOFT N9 42 3 0D CMD SOFT C2 9 42 4 00 READ LOW N9 42 5 OD CMD READ MID 9 42 6 OD CMD READ HIGH N9 42 7 OD CMD ACCEPT CAL 9 42 8 OD CMD READ C2 N9 70 7 OD STS TARE GOOD 9 70 8 00 STS ZERO GOOD 9 71 1 OD STS CAL MODE 9 71 4 OD STS WRITE GOOD N9 71 12 OD STS C2 READ GOOD 971 14 OD STS RESTORE GOOD N9 72 8 00 STS LOW GOOD 9 72 9 00 STS MID GOOD N9 72 10 OD STS HIGH GOOD 9 140 13 BTW DONE N9 140 15 BTW ENABLE 9 150 13 BTR DONE N9 150 15 ENABLE Publication 1771 6 5 117 March 1998 3 8 Using the Ladder Logic Utility What to do Next To help learn how to install and use WeighScale Configuration software read Chapter 4 Getting Started With WeighScale Configuration Software Publication 1771 6 5 117 March 1998 Introducing WeighScale Configuration Software Chapter lt Getting Started With WeighScale Configurati
4. W1 54 04 S3 03 52 O2 S1 A ATTENTION The C2 Cal connections apply only to those applications using C2 Second Generation Calibration load points Publication 1771 6 5 117 March 1998 Installing the Module If you are using an external power supply for the excitation voltage jumper the common of the excitation output I1 to the common of the sense input R1 at the remote termination panel as shown in Figure 2 5 Figure 2 5 Connecting Wires from the Junction Box to the Remote Termination Panel with the Excitation Voltage Generated by an External Power Supply ATTENTION In this configuration you must also jumper excitation to sense and excitation to sense in the junction 10V External box Power Supply Sense y 0 30mV Weight Signal Junction Box aan To Load Cell C2Cal geo EL 5 4 14 R3 3 R2 I2 1 I A ATTENTION The C2 Cal connections Wl 4 04 53 03 52 02 51 01 apply only to those applications using C2 Second Generation Calibration load oints FT1 P If the RTP is physically close to the the load cell you can bypass the junction box and connect directly from the RTP to a load cell with no sense co
5. 3 Make the desired changes 4 Click on Saving Your Changes What to do Next Managing Modules 7 7 Deleting a Module from the Module List Screen To delete a module from the Module List screen follow these steps 1 On the Module List screen select the module you want to delete by using your cursor to highlight it 2 Select Module Delete 3 The software prompts you to confirm the delete Select You can save additions or changes you make to the Module List screen When you save a project the project file is written to your computer s hard disk not to the PLC processor Downloading your project to the PLC processor To write data to the PLC processor you must download it from the Configuration Calibration or Monitor screens We show you how in Chapter 8 to do this Save your changes select Project Save save your changes with a different file name select Project Save As To help learn how to configure the WeighScale module read Chapter 8 Using WeighScale Configuration Software to Configure the Module Publication 1771 6 5 117 March 1998 7 8 Managing Modules Notes Publication 1771 6 5 117 March 1998 The Module Status pane displays status messages 4 iia The status bar indicates whether values defaults uploaded from the processor or uploaded from a file am iati Chapter 8 Using WeighScale Confi
6. numen barr Emen mais Publication 1771 6 5 117 March 1998 9 8 Reading Resistance aasma DA Posen Cai PIET What to do Next Publication 1771 6 5 117 March 1998 Using WeighScale Configuration Software to Calibrate the Module To isolate problems with the module or with the external load cells or wiring you can read the WeighScale module s internal resistance During factory testing and calibration the module is set to read the value of an internal resistor This resistance is stored in the module s non volatile RAM When you want to test the module follow this procedure 1 If you have not already done so access the Calibration screen 2 In the ID field enter an ID you select The ID can be as many as four alpha numeric characters or spaces 3 Select the radio button You see the Read Counts screen As the internal resistor is read the software displays the resistance count 4 Verify that the count stabilizes after 10 15 seconds if then the resistance count is within acceptable tolerance of the stored value count stabilizes after 10 15 seconds and a test resistance failure does not occur status block word 1 bit 13 is not set The module is operating properly If you still experience problems the load cells or wiring may be bad and may need to be replaced a test resistance
7. 5 6 Enabling 5 6 Logging Ifi aae ax va 5 7 LOGON OU iu See Sete 5 7 What to do NX Ud oud dona Sa pupa wd cue Su q 5 8 Chapter 6 Whatis a ProjectFile 6 1 Creating a New Project File 6 1 Opening an Existing File uud sad E ERR p PRX Aet es 6 2 Specifying Files to Be Displayed 6 3 Specifying How Files are Sorted 6 3 Renaming an Existing File 6 3 Copying an Existing Project 6 4 Creating a New Directory 6 4 Entering or Modifying the Project Description 6 5 Whatto do 6 5 Table of Contents toc iii Managing Modules Chapter 7 Configuring a Workstation 7 1 Adding a Module toa Project 7 2 Adding a Module Using the Ladder Logic Utility 1 2 Adding a Module Without Using the Ladder Logic Utility 1 3 Moving a Module From One Projectto Another 1 4 Modifying the Module ListScreen 1 5 Modifying an Existing Module 1 5 Entering or Modifying a Module Description 1 6 Deleting a Module from the Module List Screen 1 1
8. T t Models Sinis _ Ue Publication 1771 6 5 117 March 1998 10 2 Using the Module Monitor Screen Viewing or Entering Data Publication 1771 6 5 117 March 1998 View or enter data on the Monitor screen in this field do this Net Weight view the net weight on the scale net weight gross weight tare weight Gross Weight view the gross weight on the scale Rate of Change view the rate at which weight on the scale is changing Scale Capacity view the maximum scale capacity determined by multiplying the number of load cells by the individual load cell capacity Module Status view status messages warnings and errors from the module Zero Enable Disable Press the button to toggle the zero enabled disabled function The gross weight is set to zero when the zero function is enabled the scale is not in motion and the gross weight is within the zero tolerance value specified on the Configuration screen If security is enabled you must have the Perform Tare or Zero privilege to perform this operation Tare Enable Disable Press the button to toggle the tare enabled disabled function When the tare function is enabled and the scale is not in motion the tare value is continuously set to the gross weight This results in anet weight of zero Close Cancel Press the button when itis labeled Close or Cancel to close the screen If you press the button
9. 27 calibration month 0 12 28 calibration day 29 calibration identification MSW 30 calibration identification LSW 1 System sensitivity is a value derived from the sensitivity and output resistance of all the load cells in the system Publication 1771 6 5 117 March 1998 Editing the Configuration Calibration Block B 5 Configuration calibration block For more on these configuration calibration block words refer to page 9 Perform the Soft Calibration To perform a soft calibration 1 To place the module in calibration mode in write block word 32 set bit 0 and bit 2 to 1 read block word 1 bit 1 and bit 5 are set to 1 If the module has not previously been calibrated in read block word 1 bit 0 is set to 1 2 Perform a CAL LO A With the low calibration weight or no weight on the scale in write block word 32 set bit 4 to 1 If no errors occur in approximately 12 seconds read block word 2 bit 8 is set to 1 CAL LO successful B In write block word 32 reset bit 4 to 0 3 Accept the calibration data A In write block word 32 set bit 7 to 1 If no errors occur in read block word 1 bit 4 is set to 1 write successful B In write block word 32 reset bit 7 to 0 4 To exit calibration mode in write block word 32 reset bit 0 to 0 In read block word 1 bit 1 and bit 5 are set to 0 Publication 1771 6 5 117 March 1998 6 Editing the Configuration Calibration Bloc
10. N140 100 3 the write block bit to select a frequency rejection level of 0 50 Hz N140 100 4 the write block bit to select a frequency rejection level of 0 25 Hz N140 102 0 the write block bit to select set tare N140 102 1 the write block bit to select zero N140 132 0 the write block bit to select enable calibration mode N140 150 the first word of the status read block N140 150 7 the read block bit to indicate tare successful N140 150 8 the read block bit to indicate zero successful N140 151 1 the read block bit to indicate calibration mode 000 00 input from selector switch to select a frequency rejection level of 7 50 Hz 000 01 input from selector switch to select a frequency rejection level of 3 50 Hz 000 02 input from selector switch to select a frequency rejection level of 1 00 Hz 1 000 03 input from selector switch to select a frequency rejection level of 0 50 Hz 000 04 input from selector switch to select a frequency rejection level of 0 25 Hz 000 05 input from pushbutton switch to select set tare 000 06 input from pushbutton switch to select zero 000 11 input from pushbutton switch to enable a block transfer write whenever you want to configure calibrate or select a new frequency rejection level the floating point gross weight value read from words N140 155 and EM N140 156 in the status block the flo
11. Remote Termination Panel Choice 1771 RT44 Connecting Cable s 1771 NC6 1 8 6 ft 1771 NC15 4 6m 15 ft Agency Certification when product or packaging is marked CE marked for all applicable directives 1 You use this conductor category information for planing conductor routing as described in system level installation manual Glossary Understanding 1771 WS Terminology This glossary defines terms that we use throughout the Weigh Scale Module Cat No 1771 WS User Manual publication 1771 6 5 117 auto zero Tells the module to set the gross weight value equal to zero when the weight on the scale is within zero tolerance and the scale is not in motion This resets the zero weight of the scale See also gross weight display net weight display zero tolerance block transfer The main means of communication between the PLC processor and the module Transfers a block 64 words maximum of data to and from an I O module block transfer read address Starting address of the data table file where status data is stored after being block transferred from the module This address is assigned by the user and read by WeighScale Configuration software during calibration block transfer write address Starting address of the data table file where configuration and calibration data is stored before being block transferred to the module This address is assigned by the user and read by Weig
12. A 7 Programming the Module 9 Single Density Series A Programming Examples A 9 Double Density Programming Examples A 17 Reading Floating point A 26 Selecting the Frequency rejection Value 27 Setting the Tare Value A 27 Zeroing the Gross 28 Creating Setpoints A 29 Configuring Rate of change A 35 Saving Configuration Changes A 36 Verifying Configuration Data A 36 Appendix B Performing a Hard B 1 Enter Values inthe Block B 2 Perform the Hard B 3 Performing a Soft Calibration B 4 Enter Values Block B 4 Perform Me Soft Calibration d obs Sha white B 5 Performing a C2 Calibration B 6 Enter Values in the Block B 6 Perform the C2 Calibration B 7 Restoring the Module B 8 Saving the Tare and Zero Values in Non volatile Memory B 9 Configuration Calibration B 10 Appendix C Reading Floating Point Va
13. PLEASE FASTEN HERE DO NOT STAPLE Other Comments PLEASE FOLD HERE dci Me qm POSTAGE WILL BE PAID BY THE ADDRESSEE 6 Rockwell Automation Allen Bradley 1 ALLEN BRADLEY DR MAYFIELD HEIGHTS OH 44124 9705 NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES PLEASE REMOVE Rockwell Automation Su pport Rockwell Automation offers support services worldwide Local Product Support Contact your local Rockwell Automation representative for sales and order support product technical training warranty support support service agreements Technical Product Assistance If you need to contact Rockwell Automation for technical assistance first review the information in Chapter 12 Troubleshooting the Module For assistance that requires on site support contact your local sales office distributor or system integrator During non office hours contact the Rockwell Automation 24 hour Hotline at 1 800 422 4913 in the United States or contact your local Customer Support Center outside the United States The table below lists Customer Support Center telephone numbers Region or Area Canada Cambridge Ontario Latin America Mexico United Kingdom Milton Keynes France Paris Germany Gruiten Italy Milan Asia Pacific Hong Kong Spain Barcelona Customer Support Center Telephone Number 519 623 1810 52 5 259 0040 44 908 838800 33 1 3067 7200
14. e Ik Se chon b d anaq 3 8 Publication 1771 6 5 117 March 1998 toc ii Table of Contents Getting Started With WeighScale Configuration Software Supervising the Security System Managing Projects Publication 1771 6 5 117 March 1998 Chapter 4 Introducing WeighS cale Configuration Software 4 1 Windows Compatibility 4 1 Communication Software Compatibility 4 2 Obtaining Weigh Scale Software 4 3 Downloading Software from the Internet 4 3 Ordering Software by Mail 4 4 Communicating with PLC 5 and ControlNet Processors over the DH and Ethernet Networks 4 4 System Requirements 4 4 Installing the Software 4 5 Starting the SoftWare 2 cond died i are e FR eee d en iii 4 5 Using Online Help 4 7 Whatto do 4 7 Chapter 5 Controlling Security 5 1 Accessing the Security System 5 2 Adding 5 3 Listing Privileges 5 4 Deleting 5 5 Editing 5 5 Changing Password
15. 2 On the Weigh Scale Module Project screen from the Access pull down menu select Configure Security System Publication 1771 6 5 117 March 1998 Supervising the Security System 5 3 Initially only the username supervisor is listed As you add users their usernames are also listed From this screen you can add users list privileges delete users edit privileges change passwords Adding a User add a user to the security system 1 At the Security System screen click on If security is enabled and you try to add a user and if you are not the supervisor or do not have the Edit Users privilege you cannot access the Add User screen You see the Add User screen 2 2 On the Add User screen enter the username and password 3 Re enter the password to verify it 4 Select the privilege categories as appropriate for the particular user 5 Select the privileges under each category as appropriate for the particular user Publication 1771 6 5 117 March 1998 5 4 Supervising the Security System Listing Privileges Publication 1771 6 5 117 March 1998 Selecting privileges Clicking on selects all listed privileges clicking on Select Hune deselects previous selections 6 Click on o To list privileges assigned for a user 1 Atthe Security System screen cursor to the username 2 Click on Lisa Privileges If
16. 40 41 42 43 44 Publication 1771 6 5 117 March 1998 Accept Data For accepting new calibration data e0 Disable accept data e Enable accept data Ifin calibration mode bit 0 write CAL LO MID LIN and CAL HI reference point data to the module s non volatile memory Read Load Point Data in C2 Cal e0 Disable read load point data e1 Enable read load point data Read the calibration data from all load points found on the C2 Cal 2 wire bus and is used to automatically calculate the information for sensitivity and range for C2 Cal Read On Board Resistance Diagnostics Use Only Use this bit to connect resistance across the sense and signal lines to isolate weight reading problems If the weight reading with this resistance connected is stable and repeatable the input section of the module is functioning correctly e0 Disconnect on board resistance e Connect on board resistance Run Diagnostics e0 Disable on board diagnostics e Run the module s on board diagnostics The module does not block transfer while this is running Setpoint 1 MSW This is the most significant 16 bits of the 32 bit floating point format setpoint 1 value Setpoint 1 LSW This is the least significant 16 bits of the 32 bit floating point format setpoint 1 value Setpoint 2 MSW This is the most significant 16 bits of the 32 bit floating point format setpoint 2 value Setpoint 2 LSW Thi
17. 49 2104 6900 39 2 939 721 852 887 4788 34 3 331 7004 Your Questions or Comments on this Manual If you find a problem in this manual please notify us of it on the enclosed Publication Problem Report If you have any suggestions for how this manual could be made more useful to you please contact us at the address below Rockwell Automation Control and Information Group Technical Communication Dept 1 Allen Bradley Drive Mayfield Heights Ohio 44124 f Rockwell Automation Allen Bradley a Rockwell Automation Business has been helping its customers improve productivity and quality for more than 90 years We design manufacture and support a broad Allen Bradley range of automation products worldwide They include logic processors power and motion control devices operator interfaces sensors and a variety of software Rockwell is one of the world s leading technology companies Worldwide representation Fw Argentina e Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China P RC Colombia Costa Rica Croatia e Cyprus e Czech Republic e Denmark e Ecuador e Egypte El Salvador e Finland e France e Germany e Greece e Guatemala e Honduras e Hong Kong Hungary e Iceland e India e Indonesia e Ireland e Israel e Italy e J amaica e J ordan e Korea e Kuwait e Lebanon e Malaysia e Mexico e Netherl
18. March 1998 20 Writing Custom Ladder Logic Figure A 19 Zeroing the module MODULE ZERO SUCCESSFUL BIT UNLATCH MODULE ZERO REQUEST BIT N140 150 CMP 4 N13 0 1 H COMPARE 8 Expression 6 F141 0 lt 1 000000 USER ZERO PB UNLATCH MODULE ZERO REQUEST BIT 1 000 N13 0 t 06 6 USER ZERO PB UNLATCH MODULE ZERO REQUEST BIT MODULE ZERO REQUEST BIT 1 000 N13 0 N140 102 f 06 6 1 MODULE ZERO REQUEST BIT N140 102 m 1 MODULE ZERO REQUEST BIT MODULE ZERO SUCCESSFUL BIT N140 102 140 150 TON 1 1 It TIMER ON DELAY EN 7 1 8 Timer 140 Time base 10 pN When a zero is requested a timer starts Preset 2 If the ZERO SUCCESSFUL bit is not Accum 0 returned in two seconds the ALARM bit is set Publication 1771 6 5 117 March 1998 Figure 20 Block transfer write permissive logic Writing Custom Ladder Logic A 21 USER TARE PB PLC PROGRAM BTW TRIGGER 1 000 kar lI 1 L 05 0 MODULE TARE REQUEST BIT MODULE TARE SUCCESSFUL BIT N140 102 N140 150 1 0 1 MODULE TARE REQUEST BIT MODULE TARE SUCCESSFUL BIT N140 102 N140 150 0 7 USER ZERO 11000 06 MODULE ZERO REQUEST MODULE ZERO SUCCESSFUL BIT N140 102 N140 150 1 8 MODULE ZERO REQUEST BIT MODULE ZERO SUCCESSFUL BIT N120 102 N140 150 1 0 BTW CALIBRATE PERMISSIVE N13 0 lI 8 t 1 ZERO TOLERANCE CHANGE PERMISSIVE N
19. March 1998 3 2 Using the Ladder Logic Utility Using the Ladder Logic Utility Publication 1771 6 5 117 March 1998 To use the ladder logic utility 1 Select an unused program file to be used for the utility 2 Determine the rack and group values for the module 3 Allocate an integer data table block for the module Each module requires 160 contiguous integer elements 4 Allocate a floating point data table block for the module Each module requires 30 contiguous floating point elements 5 Copy the ladder logic utility to your development computer to use this ladder logic programming format 6200 IPDS ARCH PLC5 WEIGH copy these files Al PLC5 PROGS AI WEIGH Avoiding losing comments and symbols To avoid losing your comments and symbols when editing your ladder logic do the following A Export the ladder logic and documentation to ASCII file s B Use a text editor to edit the files C Import the files into your programming software You can import both 6200 and AI format files into RSLogix5 Using the Ladder Logic Utility 3 3 Changing ladder logic utility defaults The ladder logic utility uses program file 2 as a default and assumes that the module is located in rack 0 group 1 module 0 The utility also assumes that the integer block is N9 0 to N9 159 and the floating point block is F10 0 to F10 29 If your module differs from the default you need to modify the ladder logic utility code
20. W Allen Bradley WeighScale Module User Cat No 1771 WS M anua Important User Information Because of the variety of uses for the products described in this publication those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements including any applicable laws regulations codes and standards The illustrations charts sample programs and layout examples shown in this guide are intended solely for purposes of example Since there are many variables and requirements associated with any particular installation Allen Bradley does not assume responsibility or liability to include intellectual property liability for actual use based upon the examples shown in this publication Allen Bradley publication SGI 1 1 Safety Guidelines for the Application Installation and Maintenance of Solid State Control available from your local Allen Bradley office describes some important differences between solid state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication Reproduction of the contents of this copyrighted publication in whole or in part without written permission of Allen Bradley Company Inc is prohibited Throughout this manual we use notes to make
21. 1 3 remote termination panel 1 3 use of data table 1 3 Windows 95 4 1 Windows NT 4 1 computer requirements 4 4 configuration defined See download upload saving changes A 36 verifying data 36 configuration block B 1 B 9 Configuration screen defined G 2 configuration values copying between modules 8 14 copying to a new module using ladder logic utility to 8 14 without using ladder logic utility to 5 downloading 8 12 uploading 8 13 configuration calibration block A 7 B 1 connecting RTP to junction box 2 9 connection points 2 10 control of security 5 1 Publication 1771 6 5 117 March 1998 Index Publication 1771 6 5 117 March 1998 ControlNet 4 4 conventions P 4 COPY FILE instruction C 1 D data ready A 5 data table use 1 3 deadband A 29 defined G 2 See also setpoint decimal point C 1 decimal point location selecting 8 4 definitions G 1 delete user 5 5 DH 4 4 diagnostic indicators 2 12 12 1 DIN mounting rails 2 7 directory creating a new 6 4 removing 6 4 discrete transfer A 7 disks 4 4 double density Series B 2 2 download defined G 2 downloading tips 8 13 drive convention P 4 E edit privileges 5 5 configuration calibration block electrostatic damage 2 1 EMC 2 6 enable security 5 6 enclosure depth 2 4 Ethernet 4 4 European Union Directive Mark 2 6 evaluation period defined See rate of change vali
22. Paste inte Selection Publication 1771 6 5 117 March 1998 If you have several modules with similar or identical configurations you can configure one module then use that module to configure other similar modules This procedure assumes that you have already added the destination module to your project see Chapter 6 of this manual To copy configuration data from one module to another 1 On the Module List screen select the source module by highlighting it 2 Select Edit Copy 3 Select the destination module by highlighting it The destination module can be in the same project or a different project 4 Select Edit Paste Into Selection 5 Access the Configuration screen for the destination module From the Configuration screen A View the pasted data B Make any required changes C Download configuration information to the PLC processor e afile or both the processor and a file If you have several modules with similar or identical configurations you can configure one module then use that module to configure other similar modules To copy configuration data from one module to another when using the ladder logic utility 1 On the Module List screen select the source module by highlighting it 2 Select Edit Copy 3 Select Edit Paste Into New Use Utility Using WeighScale Configuration Software to Configure the Module 8 15 4 Enter this information in this field Name the
23. block Figure A 32 Copying setpoints to block transfer write data block setpoint N130 COP I COPY FILE Source 8 0 Destination N140 133 Length 2 preact COP COPY FILE Source 8 1 Destination N140 137 Length 2 deadband COP COPY FILE Source 8 2 Destination N140 141 Length 2 7y weight description E 9 P r BTD 4 BIT FIELD DISTRIB Source N7 0 5 Source bit 0 Destination N140 145 0 Destination bit 0 Length 1 Publication 1771 6 5 117 March 1998 Writing Custom Ladder Logic A 33 In Figure A 33 to verify that the module has the new setpoints we copy the module s setpoints from the block transfer read data block to a floating point file The setpoints are then compared with setpoints in the recipe Figure A 33 Verifying the module has new setpoints SETPOINT DOWNLOAD PERMISSIVE N13 0 I 11 EQU EQUAL Source Source B F8 0 90 00000 F8 10 90 00000 EQU r 4 EQUAL Source A Source B F8 1 8 000000 F8 11 8 000000 r COP COPY FILE Source N140 180 Destination 8 10 Length 1 COP COPY FILE Source N140 184 Destination 8 11 Length 1 r COP COPY FILE Source N140 188 Destination 8 12 Length 1 SETPOINT DOWNLOAD PERMISSIVE EQU N13 0 EQUAL U Source F8 2 3 000000 Source B F8 12 3 000000 Publication 1771 6 5 117 March 1998 34 Publication 177
24. e The module was last calibrated in either Soft Cal or C2 Cal mode Last Soft Cal C2 Cal Mode This bit is only valid if bit 2 is on e0 The module was last calibrated Soft Cal mode e The module was last calibrated in C2 Cal mode Write Successful e0 Write not successful e Write to non volatile memory successful Current Calibration Mode e0 Set for Hard Cal e Set for Soft Cal or C2 Cal Current Soft Cal C2 Cal Mode This bit is only valid if bit 5 is on e Set for Soft Cal mode e Set for C2 Cal mode Publication 1771 6 5 117 March 1998 C 4 Monitoring Status Data description M Series only 2 Publication 1771 6 5 117 March 1998 11 3 4 1 0 Calibration Date or ID Error e0 No error e An invalid value was entered for the calibration year month day or identification Sensitivity Error e0 Sensitivity value is valid e1 Sensitivity value entered is invalid Range Error e0 Range value is valid e Range value entered is invalid Incorrect Load Point Count in C2 Cal number of load points found during the read matched the number specified e The number of load points found during the read did not match the number specified Load Point Error in C2 Cal e0 No load cell error e Either no load points were found or there was a communication error C2 Cal Read Complete load point data has not
25. 12 Diagnostics Reported by the Module 12 1 Troubleshooting with the Indicators 12 2 Reading On board Resistance 12 2 Checking Resistance with a Simulator Connected 12 2 Checking Block transfer Communication 12 4 Calibrating the Module to the 12 4 Checking Resistance of the Scale System 12 5 Checking Load cell Mounting 12 5 Calibrating with Piping Disconnected 12 6 Troubleshooting Load Cells 12 6 Zero Balance Test 12 6 Bridge Resistance 12 7 Resistance to Ground 12 7 Writing Custom Ladder Logic Editing the Configuration Calibration Block Monitoring Status Data Table of Contents toc v Appendix A Addressing the WeighScale Module A 1 Updating Weight Values A 2 Update Example A 4 New Datat nedum de 5 Real Time Sample Period BTR Time out A 6 Calculating RE eas A 6 Setting up Communication 7 Editing the Configuration Calibration A 7 Setting the Block transfer Write Trigger Address
26. 4 Toggle ACCEPT LOW N9 1 6 on then off 5 When MOD STS LOW GOOD N9 72 8 is set toggle MMI ACCEPT CAL N9 1 9 on then off Understanding the Data Table Layout Using the Ladder Logic Utility 3 5 to perform this function your logic should restore calibration 1 Configure the module by using WeighS cale Configuration software or manually setting configuration parameters 2 Copy the voltage values from the BTR to the BTW block ladder and configuration software do this automatically on completion of a successful calibration 3 Toggle RESTORE CAL N9 1 11 on then off The following tables show the location of the integer and floating point blocks the ladder logic utility uses Important Avoid using any locations marked reserved Table 3 A Integer file layout address description 9 0 internal control bits N9 1 MMI interface bits 9 2 3 internal control bits N9 4 8 reserved 9 9 1 and 2 copy of single transferred preact bits N9 10 58 configuration calibration block 9 59 69 reserved N9 70 133 status block 9 134 139 reserved N9 140 145 BTW control block 9 150 155 BTR control block N9 156 159 reserved Publication 1771 6 5 117 March 1998 3 6 Using the Ladder Logic Utility Understanding Symbolic Names Used by the Utility Publication 1771 6 5 117 March 1998 Table 3 B Floating point file layout address description
27. 50Hz R 1 75 0 25Hz R 2335 Publication 1771 6 5 117 March 1998 4 Writing Custom Ladder Logic Actual weight at load cell Sample weight reflecting a 100ms time delay resulting from a frequency rejection selection of 7 5Hz Average weight based on 4 samples 40 30 20 10 40 30 20 10 40 30 20 10 c C C UC UC C UO O CF cr C C UD Publication 1771 6 5 117 March 1998 Update Example Consider this example in which you have selected a real time sampling period of 50ms and the weight at the load cell instantaneously increases from 0 to 40 Ib 50ms 100ms 150ms 200ms 250ms 300ms 350ms In this example if you have selected a WAVERSAVER frequency rejection level of 7 50Hz the full change in weight is not reflected in the samples taken in the module until after a 100ms delay With a selection of 4 samples used to calculate the average this average weight entered into the status block does not reflect the actual weight of 40 pounds until 200ms later or a total of 300ms after the weight change occurred at the load cell Writing Custom Ladder Logic 5 New Data Real time sampling lets you cycle data between the module and the PLC processor at a rate you specify You set the real time sampling period based on the required system response time and the rate at which the system can execute block transfer reads Set the real time sampling period to be greater than t
28. 6 to 1 If no errors occur in approximately 12 seconds in read block word 2 bit 10 is set to 1 CAL HI successful C In write block word 32 reset bit 6 to 0 Publication 1771 6 5 117 March 1998 B 4 Editing the Configuration Calibration Block 5 Accept the calibration data A In write block word 32 set bit 7 to 1 If no errors occur in read block word 1 bit 4 is set to 1 The write is successful B In write block word 32 reset bit 7 to 0 6 To exit calibration mode in write block word 32 reset bit 0 to 0 In read block word 1 bit 1 is set to 0 Performing a Soft To perform a soft calibration by editing the configuration calibration Calibration block you must enter the appropriate values for these words in the configuration calibration block perform the soft calibration Enter Values in the Block Before performing a soft calibration enter the appropriate values for these words in the configuration calibration block word description 0 WAVERSAVER setting 1 weight units amp auto zero status 3 decimal point location 4 motion tolerance MSW 5 motion tolerance LSW 6 zero tolerance MSW 7 zero tolerance LSW 8 number of samples used for averaging 1 200 9 real time sample period 50 10 000ms 10 system sensitivity MSW 11 system sensitivity LSW 12 range MSW 13 range LSW 14 calibration low weight MSW 15 calibration low weight LSW 26 calibration year
29. 8 m 2 configure the module aie the 0 elearn about which type of calibration is best for your application Using WeighScale eaccess the Calibration wizard ecalibrate the module 3 1 2 n restore the calibration Calibrate the Module eread resistance to test the module eaccess the Monitor screen 10 Using the Module Monitor eview or enter data Screen view or print descriptive reports 11 Documenting P rojects learn procedures that you can use to isolate 12 Troubleshooting the Module problems Getting Help to write custom ladder logic to eaddress the module eselect weight values program your ladder logic Using this Document 3 see this appendix Writing Custom Ladder Logic calibrate the module by directly manipulating the configuration calibration block B Editing the Configuration Calibration Block monitor status data by reading information directly from the data table eread 6 digit integer values eread floating point values elearn about the implied decimal point elearn about the status block Monitoring Status Data obtain information to install and use the WeighScale module D Specifications In addition we have included a Glossary that lists and defines terms you ll need to understand to use the Weigh Scale Module and WeighScale software You can get online help on the Weigh Scale Module and WeighScale software See Chapter 4 of this manual
30. Accept Values screen t weno u serene Baz M to click on kaka Store the values you entered in the Swa module s non volatile memory t ges mami discard the values you entered LT DET sd T Te diarasi Performing a Soft Follow these steps to perform a soft calibration Calibration 1 If you have not already done so access the Calibration screen 2 In the ID field enter an ID you select The ID can be as many as four alpha numeric characters or spaces 3 Select the radio button 4 Click on Next gt 5 Click on z You see the Set Soft Set Soft Calibration Values Sensitivity Output Resistance 1 3 5242 1 ass Calibration Load Cell Values screen 6 Enter the load cell s sensitivity and output resistance from the manufacturer s specifications or the load cell certificate A numbered field is displayed for each load cell you are using WARNING You can enter the values in any order as long as you enter the An external power supply is required HO A when using more than four load cells sensitivity and output resistance values for a given load cell in Accept the same numbered field Cancel enter sensitivity values in enter output resistance and within this range units of units of millivolts per Volt of excitation m V V dii Publication 1771 6 5 117 March 1998 9
31. BTR period by trying to execute a block transfer read more often If you are using a timer to trigger the block transfer read set a smaller preset time in the timer If you are attempting to execute a block transfer read on each program scan and you are still getting a time out you may be able to shorten the time between block transfer reads by either shortening the effective program scan or shortening the I O scan You can shorten the effective program scan by repeating the BTR rung in the ladder logic You can shorten the scan time of a remote I O link by moving some I O chassis from that remote I O link to another remote I O link You can also shorten the I O scan time for the WeighScale Module by moving it from a remote I O chassis to a local chassis Calculating Flow Giving you control over the real time sampling period allows you to calculate flow or rate of change from the change in weight that you measure To calculate flow the real time sampling period must be greater than the block transfer read period If bit 1 of word 0 in the status block is set to 1 this indicates that a block transfer read did not occur within the real time sampling period because the block transfer read period is too great Therefore the calculation is invalid Also you must disregard values from any block not identified as new data The status block is identified as new data by bit 9 of word 0 being set to 1 Setting up Communication Editing the Con
32. MOVE Source 500 Destination N140 147 500 MOV MOVE 3 Source 0 Destination Rate of change parameters To write the rate of change parameters to the module you must initiate a block transfer write Figure A 37 Copying rate of change value to floating point file to display N155 0 COP 1 1 COPY FILE B Source 3N140 196 Destination F 8 20 Length 1 Configuration changes that are made when the module is not in calibration mode are saved to non volatile memory when the save flag in the block transfer is set If this flag is not set the values reside in volatile run time memory until you reset or power up the module At this time the values are initialized to their previously stored values To set the save flag you must edit your ladder logic code If you have configured the module for double density mode the module returns configuration parameters in the block transfer read data block To configure the module for double density mode see Chapter 2 of this manual Words 48 63 store the configuration parameter values For a complete list of the block transfer read data block see Appendix C of this manual Performing Hard Calibration Appendix B Editing the Configuration Calibration Block This appendix shows you how to calibrate the module by directly manipulating the configuration calibration block in the data table rather that using the WeighScale software as describe
33. Saving Your Changes s r6 iod ee a sek DOR E 1 1 What UO Next i as tunnis ated tae whey 1 1 Using WeighScale Chapter 8 Configuration Software to Using the Module Configuration 5 8 2 Configure the Module Configuring the WeighScale Module 8 3 Selecting the Unit of Weight 8 3 Selecting Auto zero Tracking 8 3 Selecting the Number of Load Cells 8 4 Selecting the Decimal Point Location 8 4 Selecting the In motion Tolerance 8 5 Selecting the Zero tolerance Value 8 6 Selecting the WAVERSAVER Setting 8 7 Selecting Rate of Change Settings 8 7 Selecting the Moving Average Sample Size 8 8 Selecting the Real time Sampling Period 8 9 Viewing the Module s Firmware Series and Revision 8 9 Viewing the Module Density 8 9 Viewing the Module Status 8 9 Downloading Configuration Values 8 12 Uploading Configuration Values 8 13 Copying Configuration Values Between Modules 8 14 Copying Configuration Values into a New Module When You Are Using the Ladder Logic Utility 8 14 Copying Configuration Values into a New Module When You Are Not Using the Ladde
34. These values are restored automatically when power is restored to the module To store tare and zero values in non volatile memory 1 In write block word 32 set bit 7 accept data to 1 2 Wait until the module sets read block word 1 bit 2 write successful to 1 3 In write block word 32 reset bit 7 to 0 Configuration Calibration The configuration calibration block contains 33 words as follows Block b gt Terminology If you need definitions of the Weigh Scale Module terms used in this chapter see the Glossary at the end of this manual RS Words shaded in in this table indicate that these words apply to se double density Series B mode only Series B only word bits description N140 100 WAVERSAVER Selection Use one ofthese bits to selectthe lowest frequency to reject Only changes of weight at frequencies below this value is reflected in the input value passed on in the status block as the weight value This frequency rejection action eliminates process noise and causes a more stable weight reading These selections are mutually exclusive If you turn on more than one bit the WAVERSAVER selection error is reported in bit 15 of word 0 in the status block f e1 Reject all frequencies of 7 50 Hz and above f e1 Reject all frequencies of 3 50 Hz and above f e1 Reject all frequencies of 1 00 Hz and above f e1 Reject all frequencies of 0 50 Hz and above Default selection
35. These values are updated constantly in the active window The Calibration Wizard also displays the unit of weight you selected in configuring the module The Calibration Wizard allows you to enter calibration weight values in the units you selected Previous calibration date and ID The Calibration Wizard displays the date of the last successful calibration and the ID that was used The ID value is provided so you can identify the person performing the calibration It is not used by the module The ID can be as many as four alpha numeric characters Module status The Calibration Wizard displays real time status messages from the module Enabling buttons A button appears gray when it is disabled When you are instructed to click on a button on the screen you may have to wait as many as 15 seconds before the button is enabled Buttons are not enabled until all conditions are right to continue Advancing to the next step If the wizard does not appear to advance to the nest step check the Status pane for error messages Going back to a previous page You can go back to a previous page by clicking the _ lt Beck button When you go back you must repeat all steps on the previous and subsequent pages Publication 1771 6 5 117 March 1998 9 4 Using WeighScale Configuration Software to Calibrate the Module Performing a Hard Calibration Optional You are not required to enter a midpoint linearization weight Doing so is
36. We tell you how in steps 6 and 7 below 6 Use your programming software to change the following to reflect your choices default program file number rack group and module values in the BTR and BTW instructions input bit addresses rungs 4 and 5 for the rack and group all references to N9 XXX and F10 XXX 7 Adjust all element numbers if your integer or floating point blocks do not begin with element 8 Download the program to the PLC processor Publication 1771 6 5 117 March 1998 3 4 Using the Ladder Logic Utility Using the Interface to the To use the interface we provide to the MMI you must write logic to enter values and set and clear bits described in the table below See table 3 C for symbolic identifiers to perform this function your logic should set MMI TARE N9 1 1 tare the module performs the tare until the bitis cleared zero set MMI ZERO N9 1 2 the module perform the zero until the bit is cleared change setpoints deadbands or preacts 1 Enter new values in floating point words 2 through 7 Current values are in words 8 through 13 2 Set MMI SETPOINTS N9 1 0 3 Clear MMI SETPOINTS N9 1 0 hard calibration 1 Configure the module by using WeighS cale Configuration software or manually setting configuration parameters 2 Toggle MMI HARD CAL N9 1 3 on then off 3 When MOD STS CAL MODE N9 71 1 is set place the low weight on the scale and ente
37. compatible with INTERCHANGE or RSLinx communication software see the table below INTERCHANGE software is no longer supplied with the software Contact your Rockwell Automation representative for assistance in obtaining communication software on this operating system WeighScale software is compatible with WeighScale software is compatible with RSLinx INTERCHANGE RSLinx C Development version 6 1 0 or later or RSLinx OEM Windows 3 1 or 3 11 Yes No Windows 95 Yes Yes version 1 7 or later Windows NT 3 51 or 4 0 No Yes 1 WeighS cale software is not compatible with RS Linx Lite For Information about INTERCHANGE software You can refer to the INTERCHANGE Software for Windows Release Notes publication 5850 6 5 2 RN1 and publication 5850 6 5 2 RN2 and the INTERCHANGE Software for Windows User Manual publication 5850 6 5 2 if you have specific questions about INTERCHANGE software For Information about RSLinx software You can refer to the RSLinx OEM User s Guide publication Doc ID 9399 WABOUG if you have specific questions about RSLinx software Important When using RSLinx you must perform the client application configuration To do this 1 Start RSLinx 2 Select Communications Configure Client Applications 3 Select the INTERCHANGE port mapping tab 4 Choose an INTERCHANGE port typically 1KT 0 5 Select the RSLinx driver to use for example AB kt 1 6 Click on Ok Obtaining Weig
38. configure your development computer to communicate with modules in your project 1 On the Module List screen select Project Configure Workstation Publication 1771 6 5 117 March 1998 7 2 Managing Modules 2 On the Configure Workstation dialog that appears select the communications protocol Choose from INTERCHANGE or RSLinx Oo nmrumicsisans nratucal INTERCHANGE Camrniassse pore T 1 WeekSiegan node s dress 7 7 m J c Important If you are using RSLinx you must perform the client application configuration We tell you how in Chapter 3 of this manual 3 Select the communications port 4 Set the workstation node address the DH node address of your computer 5 Click on ox Adding a Module to a Follow these steps to add modules to your project Project Adding a Module When You Are Using the Ladder Logic Utility You can use the ladder logic utility supplied with WeighScale Configuration software to perform block transfers to and from the module To add a new module that will use the ladder logic utility follow these steps 1 On the Module List screen select Module New Use Utility Scale Project scalel Ble Use Utlily Do not use Former iR Addr BTW Addr Spt Ach BTW Trig Publication 1771 6 5 117 March 1998 Managing Modules 7 3 d New Module 2 In the New Module dialog that appears typ
39. module to configure your module deadband Used to separate the turn off weight from the setpoint preventing switching chatter download upload Refers to the reading and writing of blocks of data from one device to another When data 15 transferred to a device it s considered an upload when data is transferred from a device it s considered an download Understanding 1771 WS Terminology G 3 gross weight display Tells you the total weight of the vessel being measured See also net weight display hard calibration Expects you to manually put weights on the scale to calibrate it See also C2 calibration calibration soft calibration high calibration weight High reference point for hard calibration Equal to the high weight being placed on a scale Should be equal to 80 90 of scale capacity See also hard calibration in motion tolerance Tells the module what amount of weight change will indicate that there has been a change in the weight value low calibration weight Low reference point for hard soft and C2 calibration Equal to the low weight being placed on the scale See also C2 calibration hard calibration soft calibration midpoint linearization weight Middle reference point for hard calibration if the scale needs to be calibrated for linear operation See also hard calibration Module List screen This WeighScale Configuration software screen displays the modules in the project a
40. module you want to modify by using your cursor to highlight it 2 Select Module Modify Bi Weigh Scale Project scalel Project Edit 273 Hi Module Lis Description Delete Configure Calibrate Monitor OTA BWA Ska OW BsF NIA You see the Modify Module dialog with the current settings displayed 3 Make the desired changes 4 Click on o Publication 1771 6 5 117 March 1998 7 6 Managing Modules Publication 1771 6 5 117 March 1998 Entering or Modifying a Module Description You can enter descriptive information for a module to be used when you print reports such as the manufacturing step where the module is used the physical location of the machine in which the module is used To view enter or modify a description follow these steps 1 On the Module List screen select the module you want to modify by using your cursor to highlight it 2 Select Module Description fE Weigh Scale Project scalel Boe Edt ED He Module Lis 19 Modify ENN DT Addr BTR Addr BTW Addr Spt Ach BTW Trig m i NJA Configure Calibrale Monitor You see the Change Module Description dialog with the current settings displayed LITER hame bkeodeiel Thin medale incoming parit 1 in Brea 4
41. name of the module you cannot use spaces however you can use underscores the PLC processor Data Highway node address does not apply to serial connection but you must still specify a node address PLC Address Series the module series the ladder logic utility is supported by Series B or later DT Address the data table starting address 5 Once you have entered information click on 6 Access the Configuration screen for the destination module From the Configuration screen A View the pasted data B Make any required changes C Download configuration information to the PLC processor e afile or both the processor and a file Copying Configuration If you have several modules with similar or identical Values into a New Module configurations you can configure one module then use that module When You Are Not Using to configure other similar modules the Ladder Logic Utility To copy configuration data from one module to another when you are not using the ladder logic utility 1 On the Module List screen select the source module by Cut Ctrl x highlighting it Co py Ct A 2 Select Edit Copy Pa inia Selection 3 Select Edit Paste Into New Do Not Use Utility Publication 1771 6 5 117 March 1998 8 16 Using WeighScale Configuration Software to Configure the Module 4 Enter this information in this field Name type the name of the module you cannot us
42. new information see chapter using the ladder logic utility and interface to the MMI 3 how the software is supplied 4 Supervising security 5 managing projects 6 managing modules 7 configuring the module 8 calibrating the module with the calibration wizard 9 using the software to monitor module status 10 viewing or printing reports 11 writing custom ladder logic A editing the configuration calibration block B monitoring module status without using WeighS cale Configuration software specifications D Publication 1771 6 5 117 February 1998 soc ii Summary of Changes Notes Publication 1771 6 5 117 February 1998 Preface Using this Document This preface describes how to properly and efficiently use this document It tells you about purpose of this document who should use this document what this document contains getting help conventions vocabulary Rockwell Automation support Purpose of this Document This document shows you how to use your Weigh Scale Module cat no 1771 WS in an Allen Bradley PLC 5 programmable controller system use WeighScale Configuration software provided separately from the module to configure calibrate monitor and control your module Who Should Use this This document assumes that Document you can program and operate an Allen Bradley PLC 5 d programmable controller you can program block transfer instructions you are familiar with Micr
43. of the decimal point the maximum weight you can display or enter is 9999 99 For most mechanical scales using load cells the practical resolution limit is at most 1 part in 40 000 Changes smaller than this are rarely repeatable or accurate Setting the decimal point location so large that one increment of the least significant digit represents a resolution finer than 1 in 40 000 will result in an unstable reading Although WAVERSAVER circuitry helps minimize the effect of vibrations scales in high shock or vibration environments should use the smallest possible decimal point setting Selecting the In motion Tolerance Value in this field do this In motion Tolerance enter the amount of weight change that will indicate to the module that the scale is in motion As the module operates it repeatedly reads the signals from the load cell s and calculates the weight value When you change the weight on the scale the scale requires a little time to stabilize at the new reading since changing a weight can cause the scale to swing or vibrate slightly If you tried to zero or tare the scale while it was still moving the zero or tare value would be inaccurate Publication 1771 6 5 117 March 1998 8 6 Using WeighScale Configuration Software to Configure the Module Kg Publication 1771 6 5 117 March 1998 The module determines when the scale is in motion and will not allow you to zero or tare the scale
44. significant decimal digits are placed in natural binary format in one word and the 3 least significant decimal digits are placed in natural binary format in the other word For example if the most significant word has a value of 783 and the least significant word has a value of 26 the total value is 783026 Unless the most significant word has a value of zero its sign must match that of the least significant word or the value is invalid For all weight integer values the decimal point location is implied by the decimal point location value you select decimal point location value of the implied decimal point location would be XXXXXX Publication 1771 6 5 117 March 1998 C 2 Monitoring Status Data Status Block Read the status block from the Weigh Scale Module using a block transfer read instruction The status block contains 64 words listed below Words shaded gray in this table indicate that these words apply to se double density Series B mode only Series B only gt Terminology If you need definitions of the Weigh Scale Module terms used in this chapter see the Glossary at the end of this manual word bits description 6 0 General Status and Error Bits Just Up e0 The module has received a block transfer write since the last power up or reset e The module has gone through a power up or reset since it last re
45. the mouse pointer over the Module pull down menu click the right mouse button to display a pop up menu Select Configure You see the Configuration screen 9711 geen peste Wiehe Hen of aight WWE RELEMER kila Fira KHz Eg Lh ope 60 On TE Period 1 Digits iz Hight of Dede Point MEINE Time Period of Lied Cella 13 s Moving Avg Serepic Sire zu 5 Land Cell ka reme Sampling Period Ta z imbis Tolerance fima aris A Beton Zor Tolerance H Kp Densisc Slagle biade pus Desnas La j d ani uncis rcari akc W a Configuring the WeighScale Module Using WeighScale Configuration Software to Configure the Module 8 3 Uni al eight Kg C Lb Bir epa FB B Ga 3 Enter or select information on the Configuration screen We tell you more about the information you will need to configure the module in the following section Follow these steps to use WeighScale Configuration software to configure the module Selecting the Unit of Weight in this field do this Unit of Weight select pounds Ib or kilograms kg Selecting Auto zero Tracking in this field do this Auto Zero select on or off Auto zero tracking lets a scale automatically compensate for small variations at the zero point of the scale
46. useful for ensuring more accurate weighing Publication 1771 6 5 117 March 1998 gt Follow these steps to perform a hard calibration 1 2 11 12 13 If you have not already done so access the Calibration screen In the ID field enter an ID you select The ID can be as many as four alpha numeric characters or spaces Clickon Next gt Place a low calibration weight the weight could be zero on the scale Enter the low calibration weight in the appropriate field Click on Accept After 12 15 seconds you see a message telling you the low calibration weight has been accepted Clickon Next gt Place a midpoint linearization calibration weight on the scale 10 Enter the midpoint linearization calibration weight in the appropriate field Click on 1 You see a message telling you the midpoint linearization calibration weight has been accepted Click on Next gt Place the high calibration weight on the scale Selecting a high calibration weight We recommend that you select a high calibration weight value that is 80 100 of the scale capacity Using WeighScale Configuration Software to Calibrate the Module 9 5 14 Enter the high calibration weight in the appropriate field 15 Click on Accept After about 12 15 seconds you see a message telling you the high calibration weight has been accepted 16 Click on Next gt You see the
47. while the scale is moving You can specify the amount of weight change the module uses to decide if the scale is moving When the module senses scale motion it disregards certain functions when scale motion exceeds the parameters you set To specify the amount of weight change enter a number as many as six digits The module subtracts the current weight reading from the previous weight reading If the difference in the two values ignoring the sign is greater than the setting you entered the scale is in motion The module sets the in motion bit in the data table Selecting the Zero tolerance Value in this field do this Zero Tolerance enter the range above or below the calibration zero point where auto zero tracking or manual zero is permitted The zero tolerance value defines a range of weights over which a manual or auto zero is permitted The zero point of a scale may vary slightly from what it was when the the scale was calibrated the calibration zero point due to causes such as mechanical wear material buildup temperature variations You can use auto zero and manual zero to compensate for normal variations without recalibrating the scale Important If the variation from the calibration zero point grows too large it may be an indication of a serious problem with the scale Unless you identify and correct the problem you may not be able to obtain accurate weight measurements To specify the zero tolerance valu
48. yet been read or errors were reported e load point data was read successfully and no errors were reported Test Resistance Value Failure e0 Test resistance value is within tolerance of the test resistance value taken at the factory e Test resistance value is not within tolerance of the test resistance value taken at the factory Restore Data Complete e0 Processing of values block transferred to the module for restoring calibration data is not complete e Processing of values block transferred to the module for restoring calibration data is complete If no errors were found the values have been loaded into the module s non volatile memory If errors were found they have been reported with the error bits EEPROM Failure e Successful write to EEPROM detected e Unsuccessful write to EEPROM detected Hardware Calibration Bits Calibration Low Weight Error e The CAL LO reference weight value entered was OK e0 The CAL LO reference weight value entered was invalid Midpoint Linearization Weight Error e0 The MID LIN reference weight value entered was OK e0 The MID LIN reference weight value entered was invalid Calibration High Weight Error e0 The CAL HI reference weight value entered was OK e0 The CAL HI reference weight value entered was invalid Calibration Low Attempted with Scale in Motion e0 Scale notin motion during calibration low attempt e The calibration control Calibr
49. 0 155 and N140 156 into floating point word F141 0 and copies the net weight from integer words N140 157 and N140 158 into floating point word F141 1 Publication 1771 6 5 117 March 1998 Figure A 29 More alarm points SETPOINT SETUP ERROR SETPOINT SETUP ERROR ALARM N140 178 B3 L ji 5 15 ROC WEIGHT DESCRIPTOR ERROR ROC WEIGHT DESCRIPTOR ERROR ALARM N140 178 B3 L 6 16 ROC EVAL PERIOD ERROR ROC EVAL PERIOD ERROR ALARM N140 178 B3 L 1 17 ROC TIME UNITS ERROR ROC TIME UNITS ERROR ALARM N140 178 B3 t 1 8 18 SET ALARM IF TARE SUCCESSFUL BIT NOT RETURNED IN TWO SECONDS TERRE TARE ERROR ALAR 74 0 B3 1 DN 19 SET ALARM IF ZERO SUCCESSFUL BIT NOT RETURNED IN TWO SECONDS 1771WS ZERO ERROR ALARM T4 1 B3 1 DN 20 The gross weight and net weight values are available in 32 bit floating point format in words 5 through 8 of the status block Since the status block must be in an integer file each 32 bit floating point value takes up two 16 bit integer words To copy floating point values into a floating point file use a COPY FILE instruction for this value COP COPY FILE Source 3N140 155 Destination 141 0 Length 2 use the address of the first integer word containing the 16 most significant bits of the floating point value destination the address of the floating point word indicate the length of the destination block being written to in len
50. 1 6 5 117 March 1998 Writing Custom Ladder Logic Figure A 34 Setpoint2 logic SETPOINT2 DOWNLOAD PERMISSIVE N13 0 COP 1 COPY FILE D Source 8 3 Destination N140 135 Length 2 r COP COPY FILE Source 8 4 Destination N140 139 Length 2 r COP COPY FILE Source 8 5 Destination N140 143 Length 2 r BTD BIT FIELD DISTRIB Source N7 0 5 Source bit 1 Destination N140 145 0 Destination bit 0 Length 1 SETPOINT2 DOWNLOAD PERMISSIVE 13 0 COP 1 COPY FILE 12 Source N140 182 Destination 8 13 Length 1 COP COPY FILE Source N140 186 Destination 8 14 Length 1 COP COPY FILE Source N140 190 Destination 8 15 Length 1 SETPOINT2 DOWNLOAD PERMISSIVE EQU EQU EQU 13 0 EQUAL EQUAL EQUAL U 12 Source A F8 3 Source A F8 4 Source A F8 5 200 0000 20 00000 2 000000 Source B F8 13 Source B F8 14 Source B F8 15 200 0000 20 00000 2 000000 Configuring Rate of change Writing Custom Ladder Logic A 35 In Figure A 35 the comparison result bits are single transferred to bits 10 and 11 octal to the input image word that corresponds to the module s physical location in the chassis When the weight value is to the sum of setpoint preact1 then bit 10 is set to ON Bit 11 is set to ON when the weight value to the sum of setpoint2 preact2 These bits are set to OFF when t
51. 13 0 t 9 MOTION TOLERANCE CHANGE PERMISSIVE N13 0 iL 10 SETPOINT DOWNLOAD PERMISSIVE 13 0 11 SETPOINT2 DOWNLOAD PERMISSIVE N13 0 t 12 WAVERSAVER CHANGE PERMISSIVE N13 0 3 ROC CHANGE PERMISSIVE N13 0 1 8 GENERAL ENABLE FOR BTW 1 000 t 11 Publication 1771 6 5 117 March 1998 22 Writing Custom Ladder Logic Publication 1771 6 5 117 March 1998 Figure A 21 contains an example of how to start the block transfer write for calibration or configuration You can use the block transfer write trigger bit only for configuration changes such as WAVERSAVER settings Figure A 21 Calibration logic CALIBRATE MODULE REQUEST BIT BTW CALIBRATE N 140 1 32 PERMISSIVE ME 7 0 1 BTW CALIBRATE PERMISSIVE MODULE IN CALIBRATE MODE N13 0 N140 151 11 1 1 WEIGHSCALE SOFTWARE BTW TRIGGER N13 0 lt 2 Writing Custom Ladder Logic A 23 Figure A 22 Changing WAVERSAVER logic SET WAVERSAVER 7 5HZ 1 000 r MOV I MOVE 00 Source N140 0 1 Destination N140 100 1 WAVERSAVER CHANGE PERMISSIVE N13 0 L SET WAVERSAVER 3 5HZ 3 1 000 MOV I MOVE L 01 Source 2 Destination N140 100 T WAVERSAVER CHANGE PERMISSIVE N13 0 L SET WAVERSAVER 1 00HZ 3 1 000 MOV f MOVE U 02 Sou
52. 13 0 L 3 Figure A 11 Changing zero tolerance CHANGE ZERO TOLERANCE PB 1 001 COP COPY FILE Source 3N140 6 Destination N140 106 Length 2 ENABLE BTW N13 0 L 3 Publication 1771 6 5 117 March 1998 A 16 Writing Custom Ladder Logic Publication 1771 6 5 117 March 1998 Figure A 12 Alarm points BTR TIME OUT BTR TIME OUT ALARM BIT N140 150 B3 L 1 1 INPUT OVER RANGE INPUT OVER RANGE ALARM N140 150 B3 1 3 2 INPUT UNDER RANGE INPUT UNDER RANGE ALARM N140 150 B3 1 4 3 ATTEMPTED TARE WHILE MOTION ATTEMPTED TARE WHILE IN MOTION ALARM N140 150 B3 L 5 4 ATTEMPTED ZERO WHILE IN MOTION ATTEMPTED ZERO WHILE IN MOTION ALARM N140 150 B3 1 6 5 MOTION TOLERANCE ENTRY ERROR MOTION TOLERANCE ENTRY ERROR ALARM N140 150 B3 L 12 6 ZERO TOLERANCE ENTRY ERROR ZERO TOLERANCE ENTRY ERROR ALARM N140 150 B3 L 13 1 WAVERSAVER ENTRY ERROR WAVERSAVER ENTRY ERROR ALARM N140 150 B3 L 15 8 SET ALARM IF TARE SUCCESSFUL BIT NOT RETURNED IN TWO SECONDS 1771WS TARE ERROR ALARM 74 0 B3 L DN 11 SET ALARM IF ZERO SUCCESSFUL BIT NOT RETURNED IN TWO SECONDS 1771WS ZERO ERROR ALARM T4 1 B3 1 DN 12 Writing Custom Ladder Logic A 17 Double Density Programming Examples This section lists and explains ladder logic programming examples for the module when it is configured for double density mode These are programming examples your ladder logic code
53. 13 0 EQU J H EQUAL Source A Source B N140 212 0 N140 106 10 Writing Custom Ladder Logic 25 EQU EQUAL Source Source B N140 213 1000 N140 107 0 ZERO TOLERANCE CHANGE PERMISSIVE N13 0 Figure A 28 Alarm points U 9 BTR TIME OUT BTR TIME OUT ALARM BIT N140 150 B3 L 1 1 INPUT OVER RANGE INPUT OVER RANGE ALARM N140 150 B3 L 3 2 INPUT UNDER RANGE INPUT UNDER RANGE ALARM N140 150 B3 L 4 3 ATTEMPTED TARE WHILE IN MOTION ATTEMPTED TARE WHILE IN MOTION ALARM N140 150 B3 L 5 4 ATTEMPTED ZERO WHILE IN MOTION ATTEMPTED ZERO WHILE IN MOTION ALARM N140 150 B3 L 6 5 MOTION TOLERANCE ENTRY ERROR MOTION TOLERANCE ENTRY ERROR ALARM N140 150 B3 L 12 6 ZERO TOLERANCE ENTRY ERROR ZERO TOLERANCE ENTRY ERROR ALARM N140 150 B3 L 13 7 WAVERSAVER ENTRY ERROR WAVERSAVER ENTRY ERROR ALARM N140 150 B3 L 15 8 SP WEIGHT DESCRIPTOR ERROR SP WEIGHT DESCRIPTOR ERROR ALARM N140 178 B3 je db L C 1 11 SP VALUE ERROR SP VALUE ERROR ALARM N140 178 B3 L 2 12 DEADBAND VALUE ERROR DEADBAND VALUE ERROR ALARM N140 178 B3 L 3 13 PREACT VALUE ERROR PREACT VALUE ERROR ALARM N140 178 B3 L 4 14 Publication 1771 6 5 117 March 1998 26 Writing Custom Ladder Logic Reading Floating point Values This rung unconditionally copies the gross weight from integer words N14
54. 15 Preact 1 MSW This is the most significant 16 bits of the 32 bit floating point format preact 1 value This data is used only when bit 0 of word 29 is on 39 0 15 Preact 1 LSW This is the least significant 16 bits of the 32 bit floating point format preact 1 value This data is used only when bit 0 of word 29 is on 40 0 15 Preact 2 MSW This is the most significant 16 bits of the 32 bit floating point format preact 2 value This data is used only when bit 0 of word 29 is on 41 0 15 Preact 2 LSW This is the least significant 16 bits of the 32 bit floating point format preact 2 value This data is used only when bit 0 of word 29 is on 42 0 15 SP Weight Description This word stores the unit of measure for weight in setpoint calculations e0 kilograms e1 pounds 43 0 15 RoC Time Units This word stores the rate of change in time units e0 seconds e minutes e2 hours 44 0 15 RoC Evaluation Period This word stores the value for time over which a rate of change calculation is made 1 millisecond 32 767 seconds 45 0 15 RoC Weight Description This word stores the unit of measure for weight in rate of change calculations e0 kilograms e pounds 46 0 15 RoC Calculation MSW This is the most significant 16 bits of the 32 bit floating point format RoC value This data is used only when bit 0 of word 29 is on 47 0 15 RoC Calculation LSW This is the least significant 16 bits of th
55. 1998 6 Monitoring Status Data description 15 16 17 18 19 20 21 22 23 Publication 1771 6 5 117 March 1998 Gross Weight 32 bit Floating Point Format MSW This is the most significant 16 bits of the current average gross weight value in 32 bit floating point format Gross Weight 32 bit Floating Point Format LSW This is the least significant 16 bits of the current average gross weight value in 32 bit floating point format Net Weight 32 bit Floating Point Format MSW This is the most significant 16 bits of the current average net weight value in 32 bit floating point format Net Weight 32 bit Floating Point Format LSW This is the least significant 16 bits of the current average net weight value in 32 bit floating point format Calibration Year This is the year in which the module was calibrated 1994 2100 Calibration Month This is the month of the year in which the module was calibrated 1 12 Calibration Day This is the day of the month in which the module was calibrated 1 31 Calibration Identification MSW The two most significant alpha numeric ASCII characters representing the ID of the person who last calibrated this module Calibration Identification LSW The two least significant alpha numeric AS Cll characters representing the ID of the person who last calibrated this module Calibration Low Weight MSW This word contai
56. 2 1 Set the J umper for Single Density or Double Density Mode 2 2 Calculate Backplane Current Load for the 1 0 Chassis 2 3 Determine 1 0 Chassis Addressing Mode 2 3 Determine Module Location in the 1 0 Chassis 2 4 Determine Remote Termination Panel Location 2 4 Plan for Sufficient Enclosure Depth 2 4 Key the 1 0 Chassis for Your Module 2 5 Installing the Module 2 6 European Union Directive 2 6 EMC DISCUS evitan did ua cn du q awa a Rr a 2 6 Low Voltage 2 6 Installing the Remote Termination 2 7 Connecting the Module to the Remote Termination Panel 2 8 Connecting the J unction Box to the Remote Termination Panel 2 9 Grounding the Shield 2 12 Interpreting the Indicator 0 5 2 12 What to do 2 13 Chapter 3 What s This Chapter 3 1 What is the Ladder Logic Utility 3 1 Using the Ladder Logic Utility 3 2 Using the Interface to MMI 3 4 Understanding the Data Table Layout 3 5 Understanding Symbolic Names Used by the Utility 3 6 Whatto UU
57. 6 Using WeighScale Configuration Software to Calibrate the Module Performing a C2 Calibration Be gui a Publication 1771 6 5 117 March 1998 to click on accept the sensitivity and output resistance values discard the values you entered 7 10 Place a low calibration weight the weight could be zero on the scale Enter the low calibration weight in the appropriate field Click on Accept After about 12 15 seconds you see a message telling you the low calibration weight has been accepted Click Next gt You see the Accept Values screen to click on store the values you entered in the Accept module s non volatile memory Accept discard the values you entered Follow this procedure to perform a C2 calibration 1 2 If you have not already done so access the Calibration screen In the ID field enter an ID you select The ID can be as many as four alpha numeric characters or spaces radio button Place a low calibration weight the weight could be zero on the scale Enter the low weight in the appropriate field Click on Nest After about 12 15 seconds you see the a message telling you the low calibration weigh has been accepted Clickon Next gt You see the Accept Values screen to click on store the values you entered in the Accept module s non volatile memory Accept discard the values you entered 8 W
58. COMPARE 7 Expression F141 1 lt 1 000000 USER TARE PB CHANGE ZERO TOLERANCE PERMISSIVE 1 000 N13 0 3t t 05 5 USER TARE PB CHANGE ZERO TOLERANCE PERMISSIVE 1 000 13 0 C 5 MODULE TARE REQUEST 5 E JE 05 5 MODULE TARE REQUEST N140 102 0 MODULE TARE REQUEST MODULE TARE SUCCESSFUL 140102 140 150 r TON E 1 0 P 0 TIMER ON DELAY EN Timer T4 0 Time base 1 0 pN Preset 2 Accum 0 Publication 1771 6 5 117 March 1998 A 12 Writing Custom Ladder Logic Figure A 7 Zeroing the module MODULE ZERO SUCCESSFUL UNLATCH ZERO REQUEST N140 150 CMP 4 N13 0 T H COMPARE 8 Expression 6 F141 0 1 000000 USER ZERO PB UNLATCH ZERO REQUEST 1 000 N13 0 111 06 6 USER ZERO PB UNLATCH ZERO REQUEST MODULE ZERO REQUEST 1 000 N13 0 N140 102 lf 1 Jt C 06 6 1 MODULE ZERO REQUEST N140 102 1 MODULE ZERO REQUEST MODULE ZERO SUCCESSFUL N140 100 N140 150 TON E JE TIMER ON DELAY EN 8 Timer TAO Time base 10 pN When a zero is requested a timer starts Preset 2 If the ZERO SUCCESSFUL bit is not re Accum 0 turned in two seconds the ALARM bit is set Publication 1771 6 5 117 March 1998 Figure A 8 Block transfer write permissive logic Writing Custom Ladder Logic A 13 USER TARE PB BTW PERMISSIVE 1 000 N13 0 1 C 05 0 MODULE TA
59. During this check the RUN FAULT indicator flashes green at a rate of 5 to 10 times a second This self diagnostic check lasts from 2 to 30 seconds depending on the WAVERSAVER selection the lower the frequency the longer the time When it completes this check satisfactorily the RUN FAULT indicator becomes a steady green However if the module does not have valid calibration data the RUN FAULT indicator will flash green at a rate of once a second If a fault is found initially or occurs later the RUN FLT indicator turns red The bottom indicator is the calibrate communication indicator This indicator flashes green when doing block transfers it flashes red during calibration Installing the Module 2 13 What to do Next To learn more about the laddder logic utility supplied with the WeighScale Module read Chapter 3 Using the Ladder Logic Utility Publication 1771 6 5 117 March 1998 2 14 Installing the Module Publication 1771 6 5 117 March 1998 What s in This Chapter What is the Ladder Logic Utility Series only Chapter 3 Using the Ladder Logic Utility This chapter tells you how to use the ladder logic utility and interface to your man machine interface MMI supplied with WeighScale Configuration software WeighScale Configuration software includes a ladder logic utility to minimize the programming you need to do to use the module The utility provides all the ladder logic co
60. LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit value that defines the acceptable tolerance for zero weight 0 through 999 Samples The number of weight samples used to calculate the average current weight Since an A D conversion takes 50ms the weight is sampled every 50ms After each sample the average is calculated based on the last number of samples as specified 1 through 200 word bits Editing the Configuration Calibration Block B 11 description N140 116 16 17 18 0 15 19 0 15 20 0 15 Real Time Sampling Period This value sets the period at which the module puts a new average weight value into the read block and turns on the new data bit bit 9 of word 0 If a real time sample period has passed without a block transfer read the real time sample period read block time out bit bit 1 of word 0 in the status block is turned on Enter the period value in milliseconds 50 through 10 000 in increment of 50 Sensitivity MSW Soft Cal Only This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit full scale voltage value as taken from the load cell calibration data sheet for the load cell being used Sensitivity LSW Soft Cal Only This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit full scale voltage value as taken from the load cel
61. Lights Publication 1771 6 5 117 March 1998 On the cable from the junction box to the RTP connect the shield drain wire to the 81 S2 S3 or S4 terminal on the RTP shield connections are internally connected together in the RTP so that only one wire is required to ground the entire remote termination panel In Figures 2 3 2 4 and 2 5 we show a connection to S2 for simplicity of illustration Ground the shield at only one end of the cable Because we don t know whether you have the ability to provide a good ground at the other end we recommend that you ground the by connecting a wire from the SH terminal on the RTP to a ground bus in the metal enclosure in which the remote termination panel is mounted The front panel of the 1771 WS module contains two bi color indicators a red green RUN FLT fault indicator and a red green CAL COM indicator See Figure 2 6 Figure 2 6 Diagnostic Indicators 1 Run Fault will flash green until the module has passed its self check and has been successfully calibrated at which time it becomes a steady green If a fault is found initially or occurs later it turns red RUN FLT cALICOM Calibrate Communication will flash green when doing block transfers It will flash red in 1 second intervals during calibration IF EEPROM fails O flashes red at intervals shorter than 1 second At power up the module runs through an initial self diagnostic check
62. RE REQUEST MODULE TARE SUCCESSFUL N140 102 N140 150 1 0 7 MODULE TARE REQUEST MODULE TARE SUCCESSFUL N140 102 N140 150 0 1 USER TARE PB 1 000 f 06 MODULE ZERO REQUEST MODULE ZERO SUCCESSFUL N140 102 N140 150 1 1 1 8 MODULE ZERO SUCCESSFUL N120 102 N140 150 m IE 0 CALIBRATE MODULE PERMISSIVE N13 0 8 1 GENERAL ENABLE FOR BTW f 11 are Publication 1771 6 5 117 March 1998 A 14 Publication 1771 6 5 117 March 1998 Writing Custom Ladder Logic Figure A 9 Changing WAVERSAVER logic SET WAVERSAVER 7 5HZ 1 000 r MOV I MOVE m9 Source 1 Destination N140 100 0 ENABLE BTW N13 0 SET WAVERSAVER 3 5HZ 3 1 000 r MOV t MOVE 01 Source 2 Destination N140 100 0 ENABLE BTW N13 0 SET WAVERSAVER 1 0082 1 000 r MOV 1 MOVE 02 Source 4 Destination N140 100 0 ENABLE BTW E SET WAVERSAVER 50HZ 1 000 r MOV 1 MOVE 03 Source 8 Destination N140 100 0 ENABLE BTW SET WAVERSAVER 25HZ 3 1 000 MOV I MOVE 04 Source 16 Destination N140 100 0 ENABLE BTW 3 Writing Custom Ladder Logic A 15 Figure A 10 Changing motion tolerance CHANGE MOTION TOLERANCE PB 1 001 COP COPY FILE al Source 3N140 4 Destination 3N140 104 Length 2 ENABLE BTW N
63. These variations may be caused by slight material buildup on the scale platform or vessel or by temperature fluctuations near the scale The auto zero function automatically sets the gross weight to zero when auto zero is on the scale is not in motion the weight on the scale is constant for a period of time and the weight on the scale is near the calibration zero point is in the active range For the scale to be considered not in motion the weight on the scale must be constant within the in motion tolerance for a period of 1 second moving average sample size 1 0 05 seconds For example if zero tolerance 5 Ib moving average sample size 10 auto zero tracking on weight is between 5 Ib and 5 Ib scale is motionless for 1 55 seconds then gross weight zero Publication 1771 6 5 117 March 1998 8 4 Using WeighScale Configuration Software to Configure the Module This diagram shows the range of weight over which auto zero tracking is active The calibration zero point determines the active range not the current gross weight zero point This prevents the scale zero from drifting from the true calibration zero point Calibration zero zero tolerance Auto zero tracking active Calibration zero within shaded area point Calibration zero zero tolerance Ma ai Load cate S Selecting the Number of Load Cells in this field do this No of Load Cel
64. To read on board resistance using either WeighScale software or bit 9 of word 32 in the write block select to connect the on board resistance across the sense and signal lines if the weight reading with this then resistance connected is not stable and repeatable replace the WeighScale Module with a spare stable and repeatable Publication 1771 6 5 117 March 1998 the input section of the module is functioning correctly try connecting a simulator To perform resistance checks with a simulator connected Remove all power from the remote termination panel by disconnecting the cable from the module Disconnect the load cell cable or junction box cable from the remote termination panel Troubleshooting the Module 12 3 Connect load cell simulator to the remote termination panel Follow the color code of the simulator and if possible connect it in the same configuration you used for the load cell See Figures 2 3 2 4 and 2 5 If the simulator cannot be connected in the same configuration as the load cell connect it in the configuration for which it is intended With all power removed and the cable from the module disconnected at the remote termination panel check the resistance from excitation to excitation and from signal to signal Compare these values with the resistance ratings of your simulator If the resistance values you read don t match the ratings of your simulat
65. WeighScale software to configure the Weigh Scale Module To install WeighScale Configuration software do one of the following install the program from the 5 installation diskettes you received by mail by executing setup exe on disk 1 or Double click on the executable file filename exe you downloaded to extract the installation program Then run setup exe The wizard guides you through the installation process After you ve rebooted your computer follow these steps to start the software Do not start a second copy of WeighScale Configuration software ro while one copy is already running on the same computer The software cannot prevent you from doing this However if you do communication conflicts or memory shortages can cause errors or other problems Windows 3 1 3 11 or NT 3 5 1 From the Allen Bradley program group double click on sie Windows 95 or NT 4 0 From the Start menu select Programs Allen Bradley WeighScale Configuration Software Publication 1771 6 5 117 March 1998 4 6 Getting Started With WeighScale Configuration Software Publication 1771 6 5 117 March 1998 When the software is loaded you see the Weigh Scale Module Project screen Dier ian To close WeighScale software from the File menu choose Exit Creating projects For more information on creating projects see Chapter 6 Configuring and calibrating the module Read Chapter 8 and Chapter 9 to learn how to us
66. Weight Gain W E G H 13 T ON The comparison result bit transitions to OFF when you drop to 7 Ib F OF Setpoint 10 Preact 2 Deadband 3 Writing Custom Ladder Logic A 31 In Figure A 31 the comparison result bit will transition to ON when the weight value is X 8 Ib i e setpoint preact where setpoint 10 lb preact 20 the comparison result bit will transition to OFF when the weight value is lt X 7 lb i e setpoint deadband where setpoint 10 Ib deadband 3 b When the weight value drops to 8 1b the comparison result bit turns ON If you have established alarms to notify you when the weight value reaches this value they will sound at this point The comparison result bit will remain ON until the weight value reaches 7 b Figure A 31 Setpoint Example Weight Loss Weight Loss W OFF The comparison result bit transitions G to OFF when you reach 7 Ib H l HoH T 77 The comparison result bit transition 0 to ON when you drop to 8 Ib 10 12 13 Setpoint 10 react 2 Deadband 3 The figures that follow provide examples of how you can create setpoints Publication 1771 6 5 117 March 1998 32 Writing Custom Ladder Logic In Figure A 32 we place setpoint parameters in a floating point file and copy the parameters to the module s block transfer write data
67. Windows 95 compatibility 4 1 workstation configuring 7 1 write block A 7 B 9 Publication 1771 6 5 117 March 1998 Index Publication 1771 6 5 117 March 1998 Z zero enable defined See gross weight net weight zero tolerance defined See auto zero gross weight net weight zero enable zero balance test 12 6 zero tolerance value selecting 8 6 zeroing the gross weight example programming A 28 Allen Bradley uy Publication Problem Report If you find a problem with our documentation please complete and return this form Pub Name _WeighScale Module User Manual Cat No N A Pub 1771 6 5 117 Pub Date March 1998 PartNo 955131 31 Check Problem s Type Describe Problem s Internal Use Only C Technical Accuracy tex illustration L Completeness C procedure step illustration definition info in manual What information is missing example guideline feature accessibility explanation other info notin manual C Clarity Whatis unclear Sequence Whatis not in the right order Other Comments Use back for more comments Your Name Location P hone Return to Marketing Communications Rockwell Automation 1 Allen Bradley Drive Mayfield Hts 44124 6118 Phone 440 646 3176 440 646 4320 Publication ICC G 5 21 August 1995 PN 955107 82
68. able and a byte in the output image table Determine Remote Termination Panel Location Place your 1771 RT44 remote termination panel in close proximity to the module so that the distance is within the length of the interconnect cables you choose The length of the 1771 NC6 cable is 1 8m 6 feet The length of the 1771 NC15 cable is 4 6m 15 feet Plan for Sufficient Enclosure Depth The cable connector sticks out from the front of the module The enclosure must provide room for a total of 215 mm 8 5 inches from the back panel to the connector ATTENTION Insert or remove keying bands with your fingers Installing the Module 2 5 Key the I O Chassis for Your Module To key the I O slot to accept only this type of module use the plastic keying clips shipped with each I O chassis ATTENTION Observe the following precautions when inserting or removing keying clips insert or remove keying clips with your fingers make sure that keying placement is correct Incorrect keying or the use of a tool can result in damage to the backplane connector and possible system faults I O modules are slotted in two places on the rear edge of the circuit board The position of the keys on the backplane connector must correspond to these slots to allow insertion of the module You can key any I O module slot connector in an I O chassis to receive this module Place keying clips between the following numbers labeled on the u
69. aded data appear on the right side of the status bar on the Module Configuration screen messages about uploaded data appear on the left side of the status bar on the Module Configuration screen Understanding Download Messages These download messages are displayed on the right side of the status bar on the Configuration screen this message means Values written to disk file you have successfully downloaded configuration data to a disk file Values written to PLC you have successfully downloaded configuration data to the PLC processor data table Values written to PLC and file you have successfully downloaded configuration data to the PLC processor data table and a disk file Using WeighScale Configuration Software to Configure the Module Understanding Upload Messages 8 11 These upload messages are displayed on the left side of the status bar on the Configuration screen this message Default values displayed means You see this message when you create a new module on the Module List screen then access the Configuration screen Default values are displayed on the Configuration screen until you perform an upload or download Values updated from PLC you have successfully uploaded configuration data from the PLC processor data table Values updated from disk file you have successfully uploaded from the disk file Corrupt data uploaded from PLC default values displayed the applicatio
70. ands e New Zealand Norway e Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico e Qatar e Romania e Russia CIS e Saudi Arabia e Singapore e Slovakia e Slovenia e South Africa Republic e Spain e Sweden e Switzerland e Taiwan e Thailand e Turkey e United Arab Emirates e United Kingdom e United States e Uruguay e Venezuela e Yugoslavia Allen Bradley Headquarters 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Publication 1771 6 5 117 March 1998 PN 955131 31 Supersedes Publication 1771 6 5 117 April 1996 Copyright 1998 Allen Bradley Company Inc Printed in USA
71. ark the following regulations apply EMC Directive The Series B module is tested to meet Council Directive 89 336 Electromagnetic Compatibility EMC using a technical construction file and the following standards in whole or in part e EN 50081 2 EMC Generic Emission Standard Part 2 Industrial Environment e EN 50082 2 EMC Generic Immunity Standard Part 2 Industrial Environment The product described in this manual is intended for use in an industrial environment Low Voltage Directive The Series B module is also designed to meet Council Directive 73 23 Low Voltage by applying the safety requirements of EN 61131 2 Programmable Controllers Part 2 Equipment Requirements and Tests Installing the Module 2 7 Installing the Remote Termination Panel RTP q 5 Millimeters 3 0 Inches QOOIOOOIOGOGO 2 ooo ooo ooo 3 59 Q3 m 5 For specific information that the above norm requires see the appropriate sections in this manual as well as the following Allen Bradley publications Industrial Automation Wiring and Grounding Guidelines publication 1770 4 1 Guidelines for Handling Lithium Batteries publication AG 5 4 Automation Systems Catalog publication B112 For the Weigh Scale Module you must use the 1771 RT44 remote termination panel The remote termination panels are designed for mounting on standard DIN 1 or DIN 3 mounting rails Mounting dimension
72. ata file 140 150 Length 64 Continuous N Figure A 16 Block transfer read error alarms BTR ERROR BIT BTR ERROR ALARM N155 0 B3 L 12 9 BTW ERROR BIT BTW ERROR ALARM N150 0 B3 L 12 10 Figure A 17 contains an example of how to start the block transfer write for calibration or configuration You can use the block transfer write trigger bit only for configuration changes such as WAVERSAVER settings Writing Custom Ladder Logic A 19 Figure A 17 Calibration logic BTW CALIBRATE CONFIGURE CALIBRATE MODULE REQUEST BIT N140 132 NIG f 0 1 MODULE IN CALIBRATE MODE BTW CALIBRATE PERMISSIVE N140 151 N13 0 1 1081 1 1 WEIGHSCALE SOFTWARE BTW TRIGGER N13 0 2 Figure A 18 Taring the module MODULE TARE SUCCESSFUL BIT MEINE N140 150 __ N13 0 m F COMPARE 7 Expression 5 141 1 1 000000 USER TARE PB UNLATCH TARE REQUEST BIT 1 000 13 0 1 05 5 MODULE TARE REQUEST USER TARE PB UNLATCH TARE REQUEST BIT 1 000 N13 0 N140 102 t IN 1 05 5 0 MODULE TARE REQUEST BIT N140 102 0 MODULE TARE REQUEST BIT MODULE TARE SUCCESSFUL BIT N140 102 140 150 p TON p 1 1 Jt TIMER ON DELAY EN 0 1 Timer T4 0 When a tare is requested a timer starts Time base 10 DN If the TARE SUCCESSFUL bit is not Preset 2 returned in two seconds the ALARM Accum 0 bit is set Publication 1771 6 5 117
73. ating point net weight value read from words N140 157 and ns N140 158 in the status block Programming the Module Writing Custom Ladder Logic A 9 On the pages that follow we included both single density and double density examples Single Density Series A Programming Examples This section lists and explains ladder logic programming examples for the module when it is configured for single density Series A mode These are programming examples your ladder logic code may be different to see an example of this block transfer write logic copying gross and net weight values to a floating point file block transfer read logic block transfer error alarms calibration logic taring the module zeroing the module block transfer write permissive logic changing WAVERSAVER logic changing motion tolerance changing zero tolerance alarm points refer to this figure on this page Al A 10 2 10 10 4 10 A 5 11 6 11 12 8 13 A 9 A 14 A 10 A 15 A 11 A 15 A 12 A 16 Publication 1771 6 5 117 March 1998 A 10 Writing Custom Ladder Logic Figure A 1 Block transfer write logic BIR BTW BTW ENABLED ENABLED PERMISSIVE N155 0 N150 0 N13 0 r BTW s BLOCK TRANSFER WRITE EN WEIGHSCALE SOFTWARE Rack 00 Group 1 NSA Module 0 m Control block N150 0 ER WeighScale software 2 Data
74. ation Low R ead bit was set on and the scale was in motion word Monitoring Status Data 5 description M Series only 14 Midpoint Linearization Attempted with Scale in Motion e0 Scale notin motion during midpoint linearization attempt e The calibration control Midpoint Linearization R ead bit was set on and the scale was in motion Calibration High Attempted with Scale in Motion e0 Scale not in motion during calibration high attempt e calibration control Calibration High R ead bit was set on and the scale was motion Midpoint Linearization to Low Difference Error e0 difference between the CAL LO and MID LIN reference points is OK greater than 100 e The difference between the CAL LO and MID LIN reference points is not greater than 100 Calibration High to Low Difference Error e0 The difference between the CAL LO and CAL HI reference points is OK greater than 100 e The difference between the CAL LO and CAL HI reference points is not greater than 100 CAL LO Successful e0 calibration low read bit is off or the the scale is in motion e The values for the CAL LO reference point have been successfully recorded MID LIN Successful e0 The midpoint linearization read bit is off or the the scale is in motion e The values for the MID LIN reference point have been successfully recorded CAL HI Successful e0 The calibra
75. binary format of the 6 digit weight value used for the MID LIN reference point Optional Set to 0 if not used Calibration High Weight MSW This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL HI reference point Calibration High Weight LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL HI reference point Calibration Low Volts MSW This is the most significant 16 bits of the 32 bit floating point format volts value calculated for the CAL LO reference point This data is used only when bit 1 of word 32 is on Calibration Low Volts LSW This is the least significant 16 bits of the 32 bit floating point format volts value calculated for the CAL LO reference point This data is used only when bit 1 of word 32 is on Publication 1771 6 5 117 March 1998 12 Editing the Configuration Calibration Block word description 21 22 23 24 25 26 27 28 29 30 Publication 1771 6 5 117 March 1998 Calibration Midpoint Linearization Volts MSW This is the most significant 16 bits of the 32 bit floating point format volts value calculated for the MID LIN reference point This data is used only when bit 1 of word 32 is on Optional Set to 0 if not used Calibration Midpoint Linearization Volts LSW This is t
76. brated in read block word 1 bit 0 is set to 1 If no errors occur in approximately 12 seconds read block word 1 bit 12 is set to 1 C2 Cal read complete Perform a CAL LO A With the low calibration weight or no weight on the scale in write block word 32 set bit 4 to 1 If no errors occur in approximately 12 seconds read block word 2 bit 8 is set to 1 CAL LO successful B In write block word 32 reset bit 4 to 0 Accept the calibration data A In write block word 32 set bit 7 to 1 If no errors occur in read block word 1 bit 4 is set to 1 write successful B In write block word 32 reset bit 7 to 0 To exit calibration mode in write block word 32 reset bit 0 to 0 In read block word 1 bit 1 and bit 5 are set to 0 Publication 1771 6 5 117 March 1998 B 8 Editing the Configuration Calibration Block Restoring the Module Publication 1771 6 5 117 March 1998 After you have calibrated the module you must copy the voltage values in the read block words 20 21 22 23 24 and 25 into the write block words 20 21 22 23 24 and 25 Note that the values in the read block are not in the same order as those in the write block If these values are not in the write block the restore function does not work All of these parameters must have valid values before the restore function can be completed low weight mid weight high weight low volts mid volts high volts calyear ca
77. can include underscores PLC Address the PLC processor Data Highway node address does not apply to serial connection but you must still specify a node address of 1 Series the module Series BTR Data Address the starting address for the PLC processor block transfer read data BTW Data Address the starting address for the the PLC processor block transfer write data Setpoint Achieved Address the address of the data table word where your ladder logic copies the setpoint status bits from the input image file BTW Trigger Bit Address the address of the PLC processor data table bit that triggers a block transfer write 3 Click on ox The module is added to the list To move a module from one project to another 1 by highlighting it Select Edit Cut Open the destination project On the Module List screen select the module you want to move Select Edit Paste Into New Use Utility or Edit Paste Into New Do Not Use Utility Complete the New Module dialog box as described previously Click on v The module is added to the list Modifying the Module List Screen Managing Modules 7 5 Once you have added modules to the Module List screen you can change the information you already entered Modifying an Existing Module To change the name PLC node data table address or port of an existing module follow these steps 1 On the Module List screen select the
78. ceived a block transfer write Real Time Sample Period BTR Time out e0 A block transfer read had been executed during the last real time sample period e1 A real time sample period has passed without a block transfer read In Motion based on the motion tolerance value e0 scale is not in motion el The scale is in motion Input Over Range e0 The input signal is not over range e The input signal differential is greater than can be measured accurately Input Under Range e0 The input signal is not under range e The input signal differential is more negative than can be measured accurately Attempt to Set Tare While in Motion e0 Either the tare function is not active or the scale is not in motion e tare function is active and the scale is in motion Attempt to Zero While in Motion e0 Either the zero function is not active or the scale is not in motion e zero function is active and the scale is in motion Tare Successful e0 Either the tare function is not active the scale is in motion or the tare function was not successfully completed e The tare function was successfully completed Zero Successful e0 Either the zero function is not active the scale is in motion or the zero function was not successfully completed e The zero function was successfully completed Publication 1771 6 5 117 March 1998 Monitoring Status Data C 3 description N
79. choose Sort By 2 From the Project Manager screen select File New The New File dialog box appears im lle New Open Chi 3 a name for the new project Rename Copy The filename cannot contain spaces You can use an underscore Create directory x however P tram list Delle Delete 4 Click on The Module List screen opens Exit Publication 1771 6 5 117 March 1998 6 2 Managing Projects 5 the Module List screen select Project Save as 6 Type the name you want to save the file as This saves the file to your computer s hard drive p Using the Module List screen We tell you how to use the Module List screen in chapter 7 gt Deleting the project file To delete a project file highlight the project file name in the project list Press the Delete key on your keyboard or from the File menu select Delete Confirm the delete by clicking on Opening an Existing File To open an existing file if then the directory containing the existing project 1 Click on the directory to select it is shown in the Previous Directories field 2 Double click on the project file or 1 Select the directory by highlighting it 2 From the Tools menu select Go to Selection the directory containing the existing project 1 From the File menu select Open is not shown on the Previous Directories 2 In the F
80. culates the rate at which the weight value is changing by measuring the weight at the beginning and end of a defined time period The difference in weight divided by the time interval is the rate of change This value can help control the rate at which an ingredient is added to a vessel for example Publication 1771 6 5 117 March 1998 8 8 Using WeighScale Configuration Software to Configure the Module Evatustion Pera a Selecting the Rate of Change Evaluation Period in this field do this RoC Time Period enter the rate of change of evaluation period in increments of 0 05 or use keys Set the time interval during which the module calculates weight change You can enter an interval between 0 05 and 32 750 in increments of 0 05 Rate of Change Evaluation Period scale response setting shorter evaluation period faster updates of rate of change value value less stable and less accurate longer evaluation period slower updates of rate of change value value more stable and more accurate Fiat Time Seconds Selecting the Rate of Change Time Period in this field do this RoC Evaluation Period select seconds minutes or hours The rate of weight change is expressed in Ib or kg per second minute or hour depending on your selections Select seconds minutes or hours Moving Peg Sagl Sle Am Selecting the Moving Average Sample Size in this field do this Moving Average Sample Size enter the m
81. d Editing the Configuration Calibration Block B 13 description N140 131 Calibration Diagnostic Control Use these bits to calibrate the module run diagnostics on the module and control data storage in the non volatile memory on the module Calibration Mode If you turn off this bit before you turn off the accept data bit bit 7 of word 32 the new calibration is lost e0 Disable calibration mode e Enable calibration mode Restore Calibration Data This bit determines whether to use the calibration data in this block to restore calibration values regardless of the state of the accept data bit bit 7 of word 32 Calibration data here refers to all calibration data including calibration volts reference points Using calibration data here refers to using old calibration data stored in the PLC data table to restore the calibration data on the module e0 Disable the writing of calibration restoration data into non volatile memory e1 Enable the writing of calibration restoration data into non volatile memory Hard Soft Calibration This bitis relevant only if bit 1 is off e0 Hard calibration mode e Soft calibration or C2 calibration mode Soft CalC2 Cal Mode This bitis relevant only if bit 1 is off and bit 2 is on e0 Set Soft Cal mode e SetC2 Cal mode The module will ignore the configuration block values for sensitivity and range Calibration Low Read e0 Disable calibration low r
82. d defined G 5 time units A 35 time units defined G 5 weight description A 35 weight description defined G 5 rate of change evaluation period selecting 8 8 rate of change time period selecting 8 8 read block C 2 reading 6 digit integer values C 1 reading floating point values A 26 C 1 reading resistance 9 8 real time sample period A 2 A 5 A 6 real time sampling period 1 2 defined G 5 selecting 8 9 related publications P 3 remote termination panel 2 4 2 7 requirements for your computer 4 4 resistance 12 2 12 5 12 7 reading 9 8 restoring the module B 8 restoring a calibration 9 7 restoring the module B 8 revision viewing 8 9 ROC See rate of change S sample period of BTR A 6 saving 7 7 saving configuration changes A 36 scale sensitivity defined G 5 security 5 1 accessing 5 2 add user 5 3 delete user 5 5 edit privileges 5 5 enable 5 6 list privileges 5 4 login 5 7 logout 5 7 password 5 6 security system control 5 1 security system supervision 5 1 sequence of communication A 7 setpoint A 29 deadband A 29 deadband defined G 5 defined G 5 example A 30 A 31 example values A 29 preact A 29 preact value defined G 5 setpoint value 29 setpoint value defined G 5 weight description A 29 weight description defined G 5 Setpoint value defined See setpoint setpoints example A 30 A 31 Setting the tare value
83. d in Chapter 8 Configuring the Module This appendix contains these sections Words 33 48 are shaded gray in this table to indicate that these words apply to double density Series B mode only To perform a hard calibration by editing the configuration block you must enter the configuration values for the appropriate words in the configuration calibration block then perform the hard calibration Publication 1771 6 5 117 March 1998 B 2 Editing the Configuration Calibration Block Enter Values in the Block Before performing a hard calibration enter the appropriate values for these words in the configuration calibration block word description WAVERSAVER setting weight units amp auto zero status decimal point location motion tolerance MSW motion tolerance LSW zero tolerance MSW zero tolerance LSW number of samples used for averaging 1 200 real time sample period 50 10 000ms OO C 9 LL c 14 calibration low weight MSW 15 calibration low weight LSW 16 calibration mid weight MSW 17 calibration mid weight LS W 18 calibration high weight MSW 19 calibration high weight LSW 26 calibration year 27 calibration month 0 12 28 calibration day 29 calibration identification MSW 30 calibration identification LSW gt Configuration calibration block For more on these configuration calibration block words refer to page 9 P
84. d resistance values for each load cell automatically uploading sensitivity and resistance values from Hardy Instruments load cells Before You Begin Before you can calibrate the module you must configure the module see Chapter 8 of this manual you will need the following to perform this type of you will need calibration ean accurate known weight near the maximum scale capacity to use as the hard high weight eoptional an accurate known weight between 0 and the high weight the sensitivity and output resistance values for each load cell in your scale from the Spit manufacturer s specifications or the load cell certificate Hardy Instruments load cells compatible with C2 calibration Which Type of Calibration You can accurately calibrate a scale using any of the three methods is Best for Your we describe in this chapter The three methods differ in ease of use Application and information and supplies required We describe the benefits of each type of calibration here C2 Calibration C2 calibration is the easiest of the three calibration types since only one test weight which can be zero is required C2 calibration requires that you use Hardy Instruments load cells however Publication 1771 6 5 117 March 1998 9 2 Using WeighScale Configuration Software to Calibrate the Module Accessing the Calibration Wizard Publication 1771 6 5 117 March 1998 Soft Calibration Soft calibratio
85. d values A 35 example A 9 A 17 example programming block transfer 7 9 selecting frequency rejection value 27 selecting WAVERSAVER value A 27 setting the tare value A 27 zeroing the gross weight A 28 examples alarms A 16 A 18 A 25 A 26 block transfer read A 17 A 18 block transfer read logic A 9 A 10 block transfer write A 17 A 18 block transfer write logic 9 calibration 9 A 11 error alarms A 10 floating point file A 10 A 18 A 36 gross weight A 10 A 18 net weight A 10 A 18 permissive 9 A 13 A 21 setpoint A 32 A 33 setpoint status A 35 tare A 11 A 19 WAVERSAVER A 14 A 23 A 24 zero A 12 20 motion tolerance A 15 A 24 zero tolerance A 15 A 24 A 25 F features 1 4 firmware series viewing 8 9 floating point values C 1 floating point values A 26 flow calculation A 6 functionality 1 2 G glossary G 1 gross weight C 1 defined See net weight grounding shields 2 12 H hard calibration 9 4 B 1 defined See C2 calibration calibration soft calibration hardware 4 4 help P 3 4 7 high calibration weight defined See hard calibration I O chassis 1 3 1 0 image 1 3 A 1 implied decimal point 1 in motion tolerance defined G 3 in motion tolerance value selecting 8 5 indicators 2 12 12 1 CAL COM 12 1 RUN FLT 12 1 input image table A 1 installation of module 2 6 of remo
86. ddressing selection We show the module s data table use in the following table Use of Data Table Compatibility Catalo Output 9 Series Image Addressing Chassis Number Bits 1 2 slot 2 slot A single densi 8 Yes B4 1771 WS BIG y B double density 8 8 64 49 vs RE No amp Yes Compatible without restriction R1 Restricted compatibility it cannot be in the same even odd pair of slots with a 32 bit module R2 Restricted compatibility it cannot be in the same even odd pair of slots 1 0 group with a 16 bit module B Compatible with 1771 A1B A2B A3B A3B1 A4B 1771 AM1 AM2 chassis You can place your 1771 WS module into any I O module slot of the I O chassis I O Chassis This module can only be used in 1771 A1B A2B A3B A3B1 A4B AMI and AM2 chassis Remote Termination Panel The 1771 WS module is compatible with the 1771 RT44 remote termination panel which you must purchase separately Processor The 1771 WS module is compatible with 1785 PLC 5 processors Publication 1771 6 5 117 March 1998 1 4 Overview of the Weigh Scale Module Features of the Weigh Scale Module What to do Next Publication 1771 6 5 117 March 1998 The 1771 WS module provides weight values in either pounds or kilograms weight values in both 16 bit integer and 32 bit floating point format the ability to tare or zero the scale compatibility with 3mV V and 2
87. de required for using the configuration software with your module logic and data table files to use another MMI with WeighScale Configuration software The ladder logic utility includes software that you can use with your own MMI such as RSView Panel View or any MMI that can read and write to a PLC 5 processor data table This software we provide functions as an interface to the MMI package you are using This MMI interface lets you program logic to enter values and set and clear bits to do certain functions The software we provide allows your MMI software and WeighScale Configuration software to work independently of one another So you can use WeighScale Configuration software to configure the module and your own MMI to calibrate the module or monitor your process Important This utility can be used only with Series B or later modules in double density mode on enhanced PLC 5 processors If you are using a Series A module a Series B module in single density mode or a Classic PLC 5 you must write your own ladder logic See Appendices A and B of this manual Important Do not use your MMI and WeighScale Configuration software to perform functions that access the same part of the data table Unpredictable system operation may result For example if you are using the WeighScale calibration wizard to perform a calibration do not try to calibrate the module at the same time with your own MMI Publication 1771 6 5 117
88. e enter a number as many as six digits that represents the maximum variation from the caibration zero point that you can compensate for with a manual or auto zero Using WeighScale Configuration Software to Configure the Module 8 7 AERE EVE Hin Nest Freq E He This diagram shows how the zero tolerance value affects the manual and auto zero operation Calibration zero N zero tolerance QNS N Calibration zero X Auto zero tracking and oint manual zero permitted 4 within shaded area SSS Calibration zero NN zero tolerance Selecting the WAVERSAVER Setting in this field select to get this WAVERSAVER 7 5 Hz faster response to weight changes Min Noise Freq less stable readings increased noise in weight signal 3 5 Hz 1 0 Hz 0 5 Hz 0 25 Hz slower response to weight changes more stable readings decreased noise in weight signal The WeighScale module includes a proprietary filter called WAVERSAVER that reduces the effect of noise or excess vibration in the weight signal The filter rejects all variations in the weight signal above the minimum or cutoff noise frequency you set for your application You can select one of five minimum noise frequency settings based on your application needs The chart above gives you an idea of the advantages and disadvantages of selecting a higher or lower minimum noise frequency Selecting Rate of Change Settings The WeighScale module Series B or later cal
89. e 32 bit floating point Publication 1771 6 5 117 March 1998 format RoC value This data is used only when bit 0 of word 29 is on word Monitoring Status Data C 9 description 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 Calibration Diagnostics Control This word stores calibration and diagnostic information that you view on the active window for configuration verification Decimal Point Location This word stores the number of digits to the right of the decimal point for all weight integer values Motion Tolerance MSW This word stores the 3 most significant decimal digits stored in natural binary format of the 6 digit value that defines the weight change that will trigger the in motion flag to be set You entered this value on the Configuration screen Motion Tolerance LSW This word stores the 3 least significant decimal digits stored in natural binary format of the 6 digit value that defines the weight change that will trigger the in motion flag to be set You entered this value on the Configuration screen Number of Averages This word stores the number of weight samples used to calculate the average current weight that you entered on the Configuration screen Number of Load Cells This word stores the number of load cells that you entered on the Calibration screen Reserved Reserved Real time Sample Period This word stores the period at wh
90. e WeighScale software to configure and calibrate your module Using the software with earlier versions of project files If you created project files using earlier versions of WeighScale software you can open them with this version of the software For example if you are using v2 0 of WeighScale software you can open project files that you created using v1 0 or 1 1 of the software After you have opened the file you can save the file in the same file format as that of the software version that you are using Once you have opened an older version of a project file and saved it to the current version you can no longer open it in the older version of the software You cannot open a project file that was created in a newer version of the WeighScale software in an older version of the software For example if you are using v1 1 of WeighScale software you cannot open project files that you created with newer versions of the software Using Online Help What to do Next Getting Started With WeighScale Configuration Software 4 7 To access the WeighScale software online help from the Help pull down menu select Contents if you are using you see so you should Windows 3 1 3 11 the help contents screen double click on a topic to view it or NT 3 5 1 Windows 95 or book icons double click on a book to open the topic NT 4 0 To view help for a particular screen click on a field for which you want help To help learn how to con
91. e spaces however you can use underscores PLC Address the PLC processor Data Highway node address does not apply to serial connection but you must still specify a node address Series the module series BTR Data Address the starting address for the PLC processor block transfer read data the starting address for the PLC block transfer write data BTW Data Address Setpoint Achieved the address of the PLC processor data table word where your Address ladder logic copies the setpoint status bits from the input image file BTW Trigger Bit the address of the PLC processor data table bit that triggers a Address block transfer write 5 Click on meom The module is added to the list 6 Access the Configuration screen for the destination module From the Configuration screen A View the pasted data B Make any required changes C Download configuration information to the PLC processor afile or both the processor and a file What to do Next To help learn about how to calibrate the WeighScale module read Chapter 9 Using WeighScale Configuration Software to Calibrate the Module Publication 1771 6 5 117 March 1998 Chapter 9 Using WeighScale Configuration Software to Calibrate the Module WeighScale Configuration Software provides you with three types of calibrations yet le Ud o to calibrate the scale by hard physically measuring low and high weights soft entering sensitivity an
92. e this information Name in this field type PLC Address 0 Name the name of the module cannot use Series spaces but can include underscores DTAddress PLC address the PLC processor Data Highway node address does not apply to serial connection but you must still specify a node address of 1 Series the module Series ladder logic utility supported by Series B or later DT Address the address of the first word of the data table block allocated to this module 3 Click on The module is added to the list Adding a Module When You Are Not Using the Ladder Logic Utility If you are using a method other than the ladder logic utility to perform block transfers to and from the module follow these steps 1 On the Module List screen select Module New Do Not Use Utility BE Weigh Scale Project scalel Addr BTW Addr Spt Ach BTW Trig Name H 000 Senes Data 00 ET Deia Addres Seipoini Achieved Addresa 7 OTA Trigger Address j 2 In the New Module dialog that appears type this information m Publication 1771 6 5 117 March 1998 7 4 Managing Modules Moving a Module From One Project to Another Cut Ctrlex Copy Ctrl C Paste mata 4 Paste inte Selection Publication 1771 6 5 117 March 1998 in this field Name type the name of the module cannot use spaces but
93. ead e1 Enable calibration low read The module sets the averages to 200 waits 12 seconds reads the value from the scale stores it as the calibration low value and uses it in conjunction with the calibration low weight for the CAL LO reference point As long as this bit is on and the scale is not in motion the module will read the calibration low value continually Midpoint Linearization Read Optional e0 Disable midpoint linearization read e1 Enable midpoint linearization read The module sets the averages to 200 waits 12 Seconds reads the value from the scale stores itas the midpoint linearization value and uses it in conjunction with the midpoint linearization weight for the MID LIN reference point As long as this bit is on and the scale is not in motion the module will read the midpoint linearization value continually Calibration High Read e0 Disable calibration high read e1 Enable calibration high read The module sets the averages to 200 waits 12 Seconds reads the value from the scale stores itas the calibration high value and uses itin conjunction with the calibration high weight for the CAL HI reference point As long as this bitis on and the scale is not in motion the module will read the calibration high value continually Publication 1771 6 5 117 March 1998 14 Editing the Configuration Calibration Block description word N140 131 RY 33 Series B only 34 35 36 37 38 39
94. earlier versions of the module To configure the jumper see Chapter 2 of this manual If you set the jumper for Series B double density operation you can now download setpoint preact and deadband values to the module the module compares weight data to the setpoint and preact values When the weight data reaches the preact value the module sets a discrete bit in the PLC input image table without a block transfer read we now return rate of change data in the block transfer read data block we also return all configuration data in the block transfer read data block A separate change to the real time sampling period affects both new and old versions of the Weigh Scale Module When the PLC processor requests a block transfer read the Weigh Scale Module responds only if the real time sampling period value has elapsed since the last block transfer read When the data transfer occurs the data in the PLC data table is the most recent information processed by the module Overview of the Weigh Scale Module 1 3 Data Table Use Communication between the module and the processor is bi directional using both block transfer reads BTRs and block transfer writes BTWs The module uses a byte in the output image table and a byte in the input image table The module also requires an area in the data table to store the block transfer read and write data image table use is an important factor in module placement and a
95. echeck the wiring to the simulator If the counts in words 26 and 27 changes as you change the output of the simulator the block transfer communication is OK for this simulator you will see a change of approximately 0 20mV V 656 000 counts as you adjust the simulator from 0 to 100 0 30mV V 985 000 counts as you adjust the simulator from 0 to 100 Once you have established communication between the PLC processor and the Weigh Scale Module calibrate the module to the simulator If you use the WeighScale software to configure the module check the status messages displayed on the calibration screen If you use ladder logic to directly manipulate the write block to configure the module check the status values in the read block If you cannot calibrate the module at this point replace the Weigh Scale Module with a spare If you can calibrate the module the module is probably OK reconnect the load cell Checking Resistance of the Scale System Checking Load cell Mounting Troubleshooting the Module 12 5 To perform resistance checks of the scale system 1 Remove all power from the remote termination panel by disconnecting the cable from the module 2 Disconnect the simulator from the remote termination panel 3 Reconnect the load cell or junction box to the remote termination panel 4 With all power removed and the cable from the module disconnected at the remote termination panel and the junction box check the resis
96. ed replace the a in these instructions with the appropriate drive designation Vocabulary In this document we often refer to e the Weigh Scale Module as the 771 WS Module or as the module the programmable controller processor as the PLC processor or the processor e transducer sensing element that measures an applied load by a change in its electrical output signal as a load cell An exception is our reference to a C2 Second Generation Calibration load point to reflect the term used by the manufacturer of that specific device Some manufacturers of load cells refer to them as load points or weigh modules e Data Highway Plus network as the DH network Publication 1771 6 5 117 March 1998 Overview of the WeighScale Module Installing the Module Using the Ladder Logic Utility Table of Contents Chapter 1 Whatls the Weigh Scale Module 1 1 Compatibility 55 5 1 2 Compatibility with Earlier Versions ofthe Module 1 2 Dita Table USE 12 us gen duh eee EP 1 3 Me c 1 3 Remote Termination Panel 1 3 PrOCES kamakasha Ga Walia 1 3 Features of the Weigh Scale Module 1 4 Whatto do 1 4 Chapter 2 Preventing Electrostatic Damage 2 1 Preparing to Install the Module
97. election Numbers 1771 NC15 2 4 2 8 1771 NC6 2 4 2 8 1771 RT44 2 4 2 7 1784 KL 4 4 1784 KT B 4 4 1784 PCMK 4 4 A access privileges 5 2 access the security system 5 2 add user 5 3 adding to a project modules 7 2 7 3 addressing 1 3 2 3 addressing the module A 1 audience P 1 auto zero defined See gross weight net weight zero tolerance auto zero tracking selecting 8 3 backplane current load 2 3 block transfer 12 4 A 7 defined G 1 block transfer read address defined G 1 block transfer write address defined G 1 block transfer programming A 7 A 9 bridge resistance 12 7 BTR period A 6 BTR sample period A 6 C2 calibration 9 6 B 6 defined See calibration hard calibration soft calibration cables 2 8 calculating flow A 6 calibrating using WeighScale Configuration software 9 1 calibration 12 4 12 6 C2 9 6 B 6 Index defined See C2 calibration hard calibration soft calibration hard 9 4 B 1 restoring 9 7 soft 9 5 B 4 which type is best for your application 9 1 calibration block B 1 B 9 Calibration screen defined G 2 Calibration Wizard accessing 9 2 categories privileges 5 2 CE mark 2 6 chassis 1 3 2 3 2 4 2 5 communication 4 4 12 4 block transfer A 7 discrete transfer A 7 setting up A 7 communication sequence A 7 compatibility 1 2 communication software 4 2 10 chassis 1 3 PLC processors 4 4 processor
98. ew Data e0 status block data has not been updated by the module since the last block transfer read e status block data has been updated by the module since the last block transfer read Decimal Point Location Error e0 The decimal point location value is valid e1 An invalid value was entered for the decimal point location Samples Entry Error e0 The Samples value is valid e invalid value was entered for the number of samples Motion Tolerance Entry Error e The motion tolerance value is valid e invalid value was entered for motion tolerance Zero Tolerance Entry Error e0 The zero tolerance value is valid e1 invalid value was entered for zero tolerance Real Time Sample Period Entry Error e0 The real time sample period value is valid e1 An invalid value was entered for the real time sample period WAVERSAVER Selection Error e0 Only WAVERSAVER selection bit is on e Multiple WAVERSAVER selection bits are on General and Soft Calibration Bits Not Calibrated e0 The current values in the non volatile memory are valid calibration values e The current values in the non volatile memory are not valid calibration values the module is new uncalibrated or has bad non volatile memory Calibration Mode e0 Not in a calibration mode e In a calibration mode Last Calibration Mode e module was last calibrated in Hard Cal mode
99. example programming A 27 Shield grounding 2 12 simulator 12 2 12 4 single density Series A 2 2 single transfer A 1 soft calibration 9 5 4 defined See calibration C2 calibration hard calibration software 4 5 help 4 7 installing 4 1 starting 4 5 software disks 4 4 software installation procedure 4 5 software starting 4 5 Specifications D 1 starting the software 4 5 status C 1 status block C 2 status data monitoring C 1 supervising the security system 5 1 system status block C 2 T tare enable defined See net weight Index 5 tare value defined See gross weight tare enable terminology G 1 time units defined See rate of change valid values A 35 troubleshooting 12 1 indicators 12 2 with indicators 12 2 U understanding 1771 WS terminology 6 1 unit of weight selecting 8 3 unit of weight defined 6 6 update of weight values A 2 upload defined 6 2 Using this Document P 1 V verifying configuration data A 36 vocabulary 4 W WAVERSAVER A 4 defined G 6 example programming A 27 WAVERSAVER setting selecting 8 7 WeighS cale Configuration software downloading from the Internet 4 3 getting started with 4 1 help 4 7 installing 4 1 obtaining 4 3 ordering 4 4 Starting 4 5 WeighS software 1 1 weight description defined See rate of change setpoint valid values A 29 A 35 weight values update 2
100. f e1 Reject all frequencies of 0 25 Hz and above Publication 1771 6 5 117 March 1998 10 Editing the Configuration Calibration Block description N140 103 Publication 1771 6 5 117 March 1998 1 1 15 0 0 15 0 15 0 15 0 15 15 Weight Modes These are modes that can be changed at any time If you save the data to non volatile memory these mode selections are saved Unit of Weight Lb Kg Set this bit to reflect the units of the calibration weight at the time of calibration e0 weight unit is Kg e1 The weight unit is Lb Default selection Auto Zero With auto zero enabled whenever the weight on the scale the absolute value of the zero offset from the calibration zero point is within zero tolerance and the scale is not in motion for 1s samples 1 0 05s the gross weight is set to zero Where samples is the number of weight samples used to calculate the average current weight You enter the Zsamples value in word 8 You enter the motion tolerance value in words 4 and 5 You enter the zero tolerance value in words 6 and 7 e0 Auto Zero disabled Default selection e1 Auto Zero enabled Weight Functions Use these functions to modify the module reference points Set Tare If this bit is on while the scale is in motion the attempt to set tare while in motion error bit is turned on e0 Leave the tare value unchanged e the scale is notin moti
101. f you want to revert to the unaltered settings do the following 1 Upload the configuration information from the file 2 Download the configuration information to the PLC processor 3 When you are done making changes download them to the file to save them Uploading Configuration When you first select a project to open configuration data you Values previously downloaded is uploaded automatically You can perform a manual upload at any time however This is useful for example when you want to transfer data stored in the file to the processor Follow these steps to upload configuration information Download gt PLC 1 On the Module Configuration screen select Calibrate File Module Upload PLC or EFI Module Upload File Close to upload configuration values from select the PLC processor data table block Module Upload PLC disk to be downloaded as needed Module Upload File 2 View the left hand side of the status bar to confirm that the values were uploaded When you perform an upload you see the destination here Publication 1771 6 5 117 March 1998 8 14 Using WeighScale Configuration Software to Configure the Module Copying Configuration Values Between Modules Cut Ctrl g Copy Ctrl C Paste Paste mto Selection Copying Configuration Values into a New Module When You Are Using the Ladder Logic Utility Cut Ctrlex Copy Ctrl C Paste inte
102. figuration Calibration Block Setting the Block Transfer Write Trigger Address Writing Custom Ladder Logic A 7 Comparison result bits 10 and 11 octal are returned by single transfers All other communication with the WeighScale Module is by block transfer Your ladder logic must provide the proper sequence of block transfer communication with the module 1 At initial start up write block transfer the configuration calibration block to the module from the processor 2 Read block transfer the status block from the module continuously at a rate based on the period of time it takes for the module to update the weight values and the real time sampling period you select 3 Whenever you need to recalibrate the module reconfigure the module reset the tare value or zero the gross weight write block transfer the configuration calibration block to the module Understanding how the module communicates The pages that follow use programming examples to show you how you can communicate with the module if you re using this mode the configuration calibration block contains single density Series A 33 words double density Series B 64 words In Chapter 8 and Chapter 9 we tell you how to enter the values for this block from the Configuration and Calibration screens Most of this block is transparent to you We list the entire block in Appendix B for reference However words 0 1 and 2 provide selections that you may
103. figure the security system read Chapter 5 Supervising the Security System Publication 1771 6 5 117 March 1998 4 8 Getting Started With WeighScale Configuration Software Notes Publication 1771 6 5 117 March 1998 Controlling Security Chapter 5 Supervising the Security System This chapter shows you how to supervise the security system for accessing WeighScale Configuration software WeighScale Configuration software provides optional security access You do not have to use security to access the system If you are the person who possesses the software disks you ultimately have control of security because you can always re install the software However the security system is set up for a user with the username of supervisor to control security The supervisor can set up usernames with passwords and privileges or change them at any time The supervisor can even set up another username with the privilege to set up usernames with passwords and privileges ATTENTION If the supervisor gives someone else edit users privileges that person then has the privilege to edit the supervisor s password When the software is first installed there are no security restrictions no usernames or passwords are needed Anyone can access any screen to do any task The security privilege selections take effect only after you enable security shut down return to Windows and then reenter WeighScale software Once secur
104. file N140 100 block transfer write trigger bit Length 33 Continuous N Figure A 2 Copying gross and net weight values to a floating point file BTR DONE BIT N155 0 COP Ted COPY FILE 13 Source N140 155 Destination 141 0 Length 2 Figure A 3 Block transfer read logic BTR BTW ENABLED ENABLED N155 0 N150 0 r BTR 3I BLOCK TRANSFER READ EN 5 Rack 00 Group 1 Module 0 Control block N155 0 Data file N140 150 Length 29 Continuous N Figure A 4 Block transfer error alarms BIR BIR ERROR BIT ERROR ALARM N155 0 B3 L 12 9 BTW BTW ERROR BIT ERROR ALARM N150 0 B3 L 12 10 Publication 1771 6 5 117 March 1998 Writing Custom Ladder Logic A 11 Figure A 5 contains an example of how to start the block transfer write for calibration or configuration You can use the block transfer write trigger bit only for configuration changes such as WAVERSAVER settings Figure A 5 Calibration logic MODULE CALIBRATE REQUEST BIT N140 132 1 BTW CALIBRATE CONFIGURE PERMISSIVE When a tare is requested a timer starts If the TARE SUCCESSFUL bit is not returned in two seconds the ALARM bit is set CALIBRATE MODULE PERMISSIVE MODULE IN CALIBRATE MODE N13 0 N140 151 t t 1 1 WEIGHSCALE SOFTWARE BTW TRIGGER N13 0 t 2 Figure A 6 Taring the module MODULE TARE SUCCESSFUL N140 150 CMP N13 0 C 1 CHANGE ZERO TOLERANCE PERMISSIVE N13 0 HT E
105. for a 1 shift in zero balance is 0 3mV This assumes 10V excitation on a load cell with 3mV V output sensitivity Full scale output with these conditions is 30mV One percent of 30mV is 0 3mV Troubleshooting the Module 12 7 Bridge Resistance Changes in bridge resistance are most often caused by a failure of a compensating element or by a broken or burned bridge wire usually caused by an electrical transient such as lightning Either type of failure must be repaired With an ohmmeter measure the resistance across each pair of input and output leads The values are the input and output resistance of the bridge The resistance is normally approximately 350Q for single ended beams and canisters 700Q for double ended beams Refer to the load cell drawing or data sheet for actual specified values Readings should be within 1 0 of specified values Reading outside of this tolerance suggest damage thoroughly inspect the load cell Resistance to Ground Electrical leakage is usually caused by water contamination within the load cell or cables Whether the leakage can be tolerated depends on the application and the electronic instrumentation being used An unstable output is most often caused by contamination With a megohmmeter measure the resistance between all 5 leads tied together 4 live leads plus the ground lead and the metal body of the load cell The reading should be 500 megohms or more If the cell fails this test remo
106. for more on WeighScale online help In addition you can refer to these documents for help on INTERCHANGE and RSLinx software and PLC processors publication name Enhanced and Ethernet PLC 5 Programmable Controllers User publication number 1785 6 5 12 Manual PLC 5 Programmable Controllers Quick Reference 1785 7 1 INTERCHANGE Software for Windows User Manual 5850 6 5 2 INTERCHANGE Software for Windows Release Note act E Doc ID RSLinx OEM User s Guide 9399 WABOUG Device Configuration Utility User Manual 5850 6 5 7 PLC 5 Programming Software Release 5 0 Instruction Set 1785 61 Reference Manual For a list of publications with information on Allen Bradley programmable controller products consult the Allen Bradley Publication Index publication 510499 Publication 1771 6 5 117 March 1998 4 Using this Document Conventions We use these conventions in this document this convention is used to p call attention to helpful information alert you to information that you should read or procedures that you should follow before proceeding E refer you to other Allen Bradley documents that might be useful Also we use these conventions to picture data entry and displays this convention represents emer keystroke commands ce abic run text that you need to type These instructions assume the 32 inch disk is to be inserted into drive a of your computer If drive is not us
107. gth 32 bit floating point words To copy the gross and net weight values together enter a length of 2 Writing Custom Ladder Logic A 27 Selecting the Frequency To illustrate how to select WAVERSAVER frequency rejection rejection Value level we use a 5 position selector switch and examine each switch position to directly control the corresponding frequency rejection bit in the write block To view examples of ladder logic code refer to Figures A 9 single density Series A example and A 22 double density Series B example Setting the Tare Value To illustrate how to set the tare value N140 150 CMP N13 0 1 1 COMPARE 7 1 Expression 5 F141 1 lt 1 000000 1 000 N13 0 Set Tare E 1 000 05 o 5 1 000 N13 0 N140 102 05 5 0 2 0 with this rung when the tare successful bit N140 150 7 is turned on and the net first weight F 141 1 is less than 1 000000 we turn on bit N13 0 5 until the pushbutton is released second we use a pushbutton switch input 1 000 05 to turn on the set tare bit N140 102 0 and hold it on through a hold in path In your application you may use other events to trigger a set tare For example it may be useful to use the event of the net weight reaching a certain level to trigger a set tare Publication 1771 6 5 117 March 1998 28 Writing Custom Ladder Logic Zeroing the G
108. guration Software to Configure the Module WeighScale Configuration software lets you download configuration information directly to the PLC processor data table in online mode or to a file on disk in offline mode The software also lets you upload information from the processor or from a file Once you have made your selections described in this chapter you should download the configuration information to the processor and to a file We tell you how in this chapter When you open the Configuration screen for a module you have just added to a project the screen displays default values for all configuration parameters The Module Status pane displays the message Offline Status is not available Once you have changed the values and dowloaded the data to a file or the PLC processor explained later in this chapter the software no longer displays the default values when you open the Configuration screen Instead the software tries to read configuration values from the PLC processor so that the screen will always display the current values If the configuration values are successfully read from the processor the Module Status pane shows real time status from the module This information is updated every second If the software is not successful in accessing the PLC processor for example if no communication link to the module exists the software uploads configuration information from the offline file The Module Status pane continue
109. guration data to the processor Important To use online mode to download configuration information you must have a Data Highway Plus serial or Ethernet connection to the PLC processor and INTERCHANGE or RSLinx software must be installed and running Use RSLinx with Ethernet connections Follow these steps to download configuration information 1 On the Module Configuration screen select Module Download PLC Module Download File or Module Download Both to download configuration values to select the PLC processor data table block to be transferred via ladder logic to the Module Download PLC WeighScale module disk to be uploaded as needed Module Download File both the PLC processor and a file Module Download Both You see the data source processor or file here a When you perform a m you see the destination here 2 View the right hand side of the status bar to confirm that the values were downloaded Using WeighScale Configuration Software to Configure the Module 8 13 gt Downloading tips Downloading to a file lets you perform configuration functions while your development computer is disconnected from the PLC processor When you connect your development computer to the processor you can transfer information between the file and the processor Downloading only to the PLC processor may be useful when you are testing changes The file will retain your unaltered settings I
110. h Scale Software Getting Started With WeighScale Configuration Software 4 3 WeighScale configuration software is longer supplied with the module You can obtain the software by downloading it from the Internet at http www ab com ordering diskettes by mailing the response card included with your module or ordering diskettes by calling the toll free number printed on the response card Downloading Software from the Internet To obtain WeighScale software over the World Wide Web your computer must have access to the Internet with web browser software such as Netscape Navigator or Microsoft Internet Explorer Follow these steps to download the software from the Internet 1 2 Connect to the Internet and launch your web browser Type the url or address of the Rockwell Automation web site The url is http www ab com Click Enter When the Rockwell Automation home page displays click on Search our Site Type Weigh Scale Module Configuration Software in the Search field Click Search Click on the link to WeighScale configuration software The WeighScale configuration software page displays 6 Download the required files Refer to the following table to download get a description of features the Help file only the WeighS cale configuration software file for download the software to the Windows 3 1 3 11 95 or NT systems same computer you will iton Important Do not copy this file to a disket
111. h a rate of change calculation is made 1 millisecond 32 767 seconds RoC Weight Description This word stores the unit of measure for weight in rate of change calculations e0 kilograms e pounds Publication 1771 6 5 117 March 1998 16 Editing the Configuration Calibration Block Notes Publication 1771 6 5 117 March 1998 Reading Floating Point Values Reading 6 Digit Integer Values Implied Decimal Point if you have selected the Appendix C Monitoring Status Data This chapter shows you how to monitor status data by reading information directly from the data table The gross weight and net weight values are available in 32 bit floating point format in words 5 through 8 Since the status block must be in an integer file each 32 bit floating point value takes up two 16 bit integer words To copy floating point values into a floating point file use a COPY FILE instruction for this value enter the address of the first integer word containing the 16 most significant bits of the floating point value destination address of the floating point word length of the destination block being written to in 32 bit floating point length words To copy the gross and net weight values together enter a length of 2 The status block contains 6 digit integer values However a 16 bit integer word has limits of 32 768 and 32 767 Therefore 2 words are used for each 6 digit integer value The 3 most
112. hScale Configuration software during calibration C2 calibration A calibration technique that uploads calibration data from Hardy Instruments C2 second generation load cells This calibration data lets the software automatically calibrate the module See also calibration hard calibration soft calibration Publication 1771 6 5 117 March 1998 G 2 Understanding 1771 WS Terminology Publication 1771 6 5 117 March 1998 calibration Sets gain range data in the module for a given load cell to convert input information to a weight You must configure the module before you can calibrate or use it The Weigh Scale module supports the three basic types of calibration e hard expects you to manually put weights on the scale to calibrate it e soft expects you to enter the scale sensitivity and output resistance for each load cell e C2 uploads calibration data from Hardy Instruments C2 second generation load cells See also C2 calibration hard calibration soft calibration Calibration screen Use this WeighScale Configuration software screen to interact with the module to calibrate your scale configuration Establishes basic module operation You must configure the module before you can calibrate or use it Your selections do not take effect until you download them to the PLC data table See also download upload Configuration screen Use this WeighScale Configuration software screen to interact with the
113. he least significant 16 bits of the 32 bit floating point format volts value calculated for the MID LIN reference point This data is used only when bit 1 of word 32 is on Optional Set to 0 if not used Calibration High Volts MSW This is the most significant 16 bits of the 32 bit floating point format volts value calculated for the CAL HI reference point This data is used only when bit 1 of word 32 is on Calibration High Volts LSW This is the least significant 16 bits of the 32 bit floating point format volts value calculated for the CAL HI reference point This data is used only when bit 1 of word 32 is on Calibration Year This is the year in which the module was calibrated 1994 2100 Calibration Month This is the month of the year in which the module was calibrated 1 12 Calibration Day This is the day of the month in which the module was calibrated 1 31 Calibration Identification MSW The two most significant upper case alpha numeric ASCII characters representing the ID of the person who last calibrated this module Calibration Identification LSW The two least significant upper case alpha numeric ASCII characters representing the ID of the person who last calibrated this module Number of Load points in C2 Cal This is the number of load points connected Itis used to verify that all of the load points were found during the automatic search for calibration data 0 through 8 wor
114. he required system response time and less than the BTR period If you do not configure the real time sampling period the module uses the default setting stored in its memory At the completion of each real time sampling period as newly calculated averages are entered into the status block the new data bit bit 9 of word in the status block is turned on As each block transfer read is executed the new data bit is turned off If your ladder logic causes a second block transfer read to be executed within a real time sampling period the module will not respond This tells you that the values you just read in that block transfer have not been updated since the previous block transfer read This is an indication that you are unnecessarily using up I O scan time without getting any new data The rate at which you need to execute block transfer reads is entirely dependent on how quickly a response is needed to a change in weight for your application Consider an application example in which you have determined that a total system response time of 1500ms is adequate and the module is in a remote I O chassis In this example the valve turn off time 15 200ms the I O scan time is 20ms the program scan time is 35ms the time it takes to do the block transfer read is 2 I O scans plus 1 program scan plus 10ms for 29 words for a total of 85ms the WAVERSAVER frequency rejection level selected is 7 5Hz and the number of samples se
115. he weight value is lt setpoint preact for example when we tare or zero the scale Figure A 35 Using comparison result bits SETPOINT 1 COMPARISON RESULT CLOSE VALVE PERMISSIVE 1 001 B3 1 10 100 SETPOINT 2 COMPARISON RESULT CLOSE VALVE PERMISSIVE 1 001 B3 1 11 101 The rate of change represents the rate of change in weight as measured by the module This calculation is based on three parameters weight description defines the unit of measure for weight in rate of change calculations Valid values for weight descriptions are 0 kilograms 1 pounds time units unit of measure for time in rate of change calculations Valid values for time units are 0 seconds 1 minutes 2 hours evaluation period the time over which a rate of change calculations are made Valid values for evaluation periods are 1 millisecond 32 767 seconds The figures that follow provide examples of how you can specify a rate of change value Publication 1771 6 5 117 March 1998 36 Writing Custom Ladder Logic time units O seconds 1 minutes 2 hours evaluation period 1 millisecond to 32 767 seconds weight description 0 kg 19 Saving Configuration Changes Verifying Configuration Data Publication 1771 6 5 117 March 1998 Figure A 36 Configuring rate of change ROC CONFIGURE PB 1 000 MOV i Pal E MOVE Source 0 Destination um MOV
116. hen calibration values have been stored you see a status message Click on Finish Using WeighScale Configuration Software to Calibrate the Module 9 7 Restoring a Calibration The WeighScale module always saves the last successful calibration to its non volatile memory When you want to replace an existing WeighScale module with a new one without calibrating the module you can restore a previously saved calibration You can also restore a calibration when you want to use the previously saved calibration instead of one you are currently working on or to replace calibration data from a failed module Important You should only restore a calibration as a short term solution for replacing a failed module Weight readings obtained from a module whose calibration was restored from another module may not be as accurate as readings from the original module After you have replaced the failed module recalibrate it as soon as possible To restore a calibration follow these steps 1 If you have not already done so access the Calibration screen 2 In the ID field enter an ID you select The ID can be as many as four alpha numeric characters or spaces 3 Select the Restore Calibration radio button 4 Clickon Next gt You see the Restore Calibration screen 5 Click 6 When calibration values have been stored click on Finish was NINE Li Male BENED ds Pee BER L Im makan coe m Heim 2 Whee
117. ich the module puts a new average weight value into the read block and turns on the new data bit You entered this value on the Configuration screen Reserved Reserved WAVERSAVER Selection This word stores the lowest frequency you want to reject You entered this value on the Configuration screen Weight Functions This word stores the tare enable and zero enable values you selected on the Configuration screen Weight Modes This word stores the value Ib or kg that you selected on the Configuration screen Zero Tolerance MSW This word stores the 3 most significant decimal digits stored in natural binary format of the 6 digit value that defines the acceptable tolerance for zero weight You entered this value on the Configuration screen Zero Tolerance LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit value that defines the acceptable tolerance for zero weight You entered this value on the Configuration screen Publication 1771 6 5 117 March 1998 C 10 Monitoring Status Data Notes Publication 1771 6 5 117 March 1998 Appendix D Specifications 1 0 Chassis Location any single 1 0 module slot Compatible I O Chassis 1771 A1B A2B A3B A3B1 A4B 1771 AM1 AM2 Number of Input Image Bits Single density Series A Double density Series 8 916 Number of Output Image Bits eSingle density Series A Do
118. ighScale Configuration software interacting directly with the PLC processor However we recommend that you use the software to set up and maintain the module You install WeighScale software on a personal computer in a DH network with the PLC 5 processor If you are using RSLinx software as a man machine interface MMI you can connect the personal computer to the PLC processor with an Ethernet link You can then enter configuration and calibration values on easy to use screens PLC 5 Processor Data Table Junction 1 0 Image Table Box gt Configuration C libration Y Block transfer Weigh Scale Write Block Module Series 233 words 1771 WS Series B 249 words Status Read Block Series 229 words Series B 264 words Publication 1771 6 5 117 March 1998 1 2 Overview of the Weigh Scale Module Compatibility Issues Publication 1771 6 5 117 March 1998 Compatibility involves previous releases of the module data table use as well as compatibility with I O chassis remote termination panels and processors Compatibility with Earlier Versions of the Module A jumper setting J1 you can change lets you configure the module for Series A single density or Series B double density operation Functional modifications made to the Weigh Scale Module for Series B do not affect how the module operates in Series A mode You can complete any tasks you performed using
119. ile Open dialog select the field desired directory and file Single click on the project file name in the you are not sure which project to open Files field You see the full filename and description Publication 1771 6 5 117 March 1998 Managing Projects 6 3 Specifying Files to Be Displayed To specify the files to be displayed in the File field to do this display only files with a wsc extension From the View menu select Project List display all files in the selected directory From the View menu select All Files 1 From the View menu select Select 2 Type a selection filter in the dialog box You can use the wildcard to specify any characters and the wildcard to specify a single character 3 Click on display files based on a filter you specify PESE Specifying How Files are Sorted All Files f You can sort files by name type size or date To specify how files Select are sorted 5 ort by 1 Select View Sort by 2 Select Name Type Size or Date Renaming an Existing File To rename an existing file File a CUN 1 Select the file to be renamed 2 Select File Rename Copy NESSES 3 In the dialog box that appears type the new filename Create directory a Remove directory from list 4 Click on E gt Delete Delete Exit Publication 1771 6 5 117 March 1998 6 4 Managing Projects Copying an Existing To cop
120. ing the Module if you use the modules excitation voltage and a sense loop is not needed connect to Excitation to junction box Shield N Not Used Not Used ing C2 Second Generation Calibration load points A sense loop is 2 11 if you use an external power supply for an excitation voltage connect to Not Used Shield ot Used ot Used Not Used Shield Not Used Ground ot Used When selecting a cable to connect between the junction box and the remote termination panel follow the load cell manufacturer s specifications Route this cable in a separate conduit and follow all guidelines for category 2 conductors as described in the PLC 5 user manual publication 1785 6 5 12 To connect the cable wiring from the junction box at the remote termination panel 1 Strip 9 mm 3 8 inch of insulation from the wire 2 Insert the wire into the open connector slot 3 Tighten the screw to clamp the wire Important The cable from the load cell to the remote termination panel can be connected through intrinsic safety barriers of class I II div 1 and 2 groups through However if you install the cable that is connected through any other type of intrinsic safety barrier the signals may be distorted such that the module will not meet the performance specifications Publication 1771 6 5 117 March 1998 2 12 Installing the Module Grounding the Shield Interpreting the Indicator
121. iption EAHA You see the Change Project Description dialog with the current Print settings displayed Print Preview r Printer Setup Close 3 Make the desired changes 4 Click on What to do Next To help learn how to manage modules in your project read Chapter 7 Managing Modules Publication 1771 6 5 117 March 1998 6 6 Managing Projects Notes Publication 1771 6 5 117 March 1998 Configuring a Workstation Chapter 7 Managing Modules Before you can use WeighScale Configuration software to configure or control a module you must add the module to a project with the Module List screen When you create a new project or open an existing one the Module List screen displays On this screen you can enter descriptive information such as module name PLC processor Data Highway node address module Series data table address block transfer read address block transfer write address setpoint achieved address block transfer write trigger address Before you can communicate with the modules you add you must configure your development computer workstation We tell you how in this chapter Also we show you how to use the Module List screen to manage the modules in your project Accessing commands on the Module menu You can access all of the commands on the Module menu by placing the mouse pointer on the Module List screen and right clicking Follow these steps to
122. iption pounds Setpoint 100 lb Preact 10 lb Deadband 15 Ib The module sets the comparison result bit to ON when the weight value is gt greater than or equal to 90 Ib i e 100 Ib 10 Ib gt 90 Ib preact When the weight value is x less than or equal to 85 Ib i e 100 Ib 15 Ib lt 85 Ib deadband then the module sets the comparison result bit to OFF In addition taring the module zeroing the module emptying the vessel or reducing the weight below the deadband value resets these bits to OFF Figures A 30 and A 31 provide additional setpoint examples Publication 1771 6 5 117 March 1998 A 30 Writing Custom Ladder Logic The comparison result bit transitions to ON when you reach 8 Ib Publication 1771 6 5 117 March 1998 In Figure A 30 the comparison result bit will transition to ON when the weight value is gt X8 lb i e setpoint preact where setpoint 1010 preact 2 Ib the comparison result bit will transition to OFF when the weight value is lt X 7 lb i e setpoint deadband where setpoint 101 deadband 3 bb When the weight value reaches 8 Ib the comparison result bit is turned ON If you have established alarms to notify you when the weight value reaches this value they will sound at this point The comparison result bit will remain ON until the weight value drops to 7 Ib Figure A 30 Setpoint Example Weight Gain
123. is taken every 50ms Time gt 50 5 100 5 150ms 200ms 250ms 300ms A D cn Use the value of this sample together with the specified number of preceding samples to calculate the average weight The module places a new average weight value into the status block each real time sampling period You specify this sampling period 50ms through 10 000ms in increments of 50ms when you configure the module See Chapter 8 Using WeighScale Configuration Software to Configure the Module or Appendix B Editing the Configuration Calibration Block Publication 1771 6 5 117 March 1998 Writing Custom Ladder Logic A 3 Although the module can place a new average weight value into the status block every 50ms the amount of time it takes in the worst case before a change of weight at the load cell is fully reflected in the average weight reported in the status block is expressed by the formula 5 50 R Where e T the amount of time it takes before a change of weight at the load cell is fully reflected in the average weight reported in the status block e S the number of samples specified for the average e the time delay based on the WAVERSAVER frequency rejection level you select as indicated in the following table if the WAVERSAVER frequency rejection level is then 7 50Hz R 0 15 3 50Hz 0 4s 1 00Hz R 0 8s 0
124. ith the Indicators Troubleshooting the Module Table 12 A shows indications probable causes and recommended actions to correct common faults which may occur Table 12 A Troubleshooting Chart indication Both indicators are OF F probable cause No power to module recommended action Check power to 1 0 chassis Recycle as necessary Possible short on the module LED driver failure Replace module RUN FLT indicator ON red icroprocessor oscillator or EPROM failure Replace module f immediately after power up indicates RAM or EPROM failure Replace module f during operation indicates possible microprocessor or backplane interface failure Replace module RUN FLT indicator is flashing green at 5 10Hz Power up diagnostics in progress Normal operation for the first 2 to 30 seconds RUN FLT indicator is flashing green at 1Hz but CAL COM indicator is off Power up diagnostics successfully completed but no valid calibration data Calibrate the module RUN FLT indicator is solid green Power up diagnostics successfully completed and valid calibration data on board Normal operation CAL COM indicator is flashing green Block transfer in progress Normal operation Reading On board Resistance Checking Resistance with a Simulator Connected 1 CAL COM indicator is flashing red Calibration in progress Normal operation
125. ithin the real time sampling period the BTR time out bit bit 1 of word 0 in the status block is turned on If a second BTR is executed within a real time sampling period the new data bit bit 9 of word 0 in the status block turns off This tells you that the values you just read in the block transfer have not been updated since the previous BTR Viewing the Module s Firmware Series and Revision in this field do this Firmware Series view the firmware series when uploaded from processor Revision view the firmware revision level when uploaded from processor Viewing the Module Density in this field do this Module Density view whether the module uses single or double density mode You can configure Series and later WeighScale modules to use single or double density mode by setting a jumper within the module We tell you how in Chapter 2 of this manual Viewing the Module Status in this field do this Module Status view real time status information On line status information displays when the Configuration screen is opened unless the module has not been previously configured or nocommunication link to the processor is available Publication 1771 6 5 117 March 1998 8 10 Using WeighScale Configuration Software to Configure the Module Publication 1771 6 5 117 March 1998 WeighScale Configuration software displays messages about the status of the module calibration and configuration messages about downlo
126. ity is enabled you need a username password and the appropriate privilege to use the software Also once security is enabled only the supervisor or someone who has the privilege can disable security Publication 1771 6 5 117 March 1998 5 2 Supervising the Security System We list privilege categories in the following table if you select this category and this privilege View users can view the calibration selections Calibrate calibrate the module Read On board read module resistance for Calibrate Resistance testing Calibration restore a previously saved calibration View view monitor selections Monitor Perform Tare or Zero tare or zero the scale Update S etpoints update setpoints view the configuration View selections nfigurer update the configuration Update selections Module List View view the module list i 7 SOUE TIS Update update the module list eadd users edelete users Edit Users eadd privileges for users Security System eremove privileges for users echange passwords Disable S ecurity disable the security system Accessing the Security System Security Esabled Sele ot Lina r zl To access the security system You see the Security System screen Add User EL M 1 If itis not already started start the software You see the Weigh Scale Module Project screen
127. k Performing a C2 Calibration To perform a C2 calibration by editing the configuration calibration block you must enter the appropriate values for these words in the configuration calibration block e perform the C2 calibration Enter Values in the Block Before performing a C2 calibration enter the appropriate values for these words in the configuration calibration block word Cc 9 U CO N N N NY Lr Lr e lt co Noun A description WAVERSAVER setting weight units amp auto zero status decimal point location motion tolerance MSW motion tolerance LSW zero tolerance MSW zero tolerance LSW number of samples used for averaging 1 200 real time sample period 50 10 000ms calibration low weight MSW calibration low weight LSW calibration year calibration month 0 12 calibration day calibration identification MSW calibration identification LSW number of load points Configuration calibration block For more on these configuration calibration block words refer to page 9 Publication 1771 6 5 117 March 1998 Editing the Configuration Calibration Block B 7 Perform the C2 Calibration To perform a C2 calibration 1 To place the module in calibration mode in write block word 32 set bit 0 bit 2 bit 3 and bit 8 to 1 In read block word 1 bits 1 5 and 6 are set to 1 If the module has not previously been cali
128. l 2 Try to calibrate the module and test your calibration with weights e If you are still unable to calibrate your module recheck the load cell mounting e If you are able to calibrate the module continue 3 Reconnect one pipe 4 Try to calibrate the module and test your calibration with weights 5 Continue reconnecting one pipe at a time and trying to recalibrate each time until you find any point that may be binding on your vessel Inspect each load cell for physical damage Look for distortion or cracks in all metal parts Excessive rippling of the diaphragm on a canister may indicate damage All welds should be free of cracks and deep pox marks Cables should also be free of cuts crimps and excessive abrasion Make note of anything that looks out of the ordinary The following three electrical tests can be useful in troubleshooting potential load cell problems Zero Balance Test Changes in zero balance can be caused by overloading the load cell Some changes may be tolerated in some applications With a milli voltmeter measure the load cell output under no load conditions It should be less than 1 the typical tolerance for zero balance of the full scale output Check the specification for zero balance tolerance and output sensitivity Cells can shift as much as approximately 10 of full scale and still be correctly functioning Re gaging may be recommended if the output has shifted more than 10 A typical value
129. l calibration data sheet for the load cell being used Range MSW Soft Cal Only This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit weight capacity value as taken from the load cell calibration data sheet for the load cell being used For multiple load cells this is the range value generated by the calibration program Range LSW Soft Cal Only This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit weight capacity value as taken from the load cell calibration data sheet for the load cell being used For multiple load cells this is the range value generated by the calibration program Calibration Low Weight MSW This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL LO reference point Calibration Low Weight LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL LO reference point Calibration Midpoint Linearization Weight MSW This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit weight value used for the MID LIN reference point Optional Set to 0 if not used Calibration Midpoint Linearization Weight LSW This word contains the 3 least significant decimal digits stored in natural
130. l month e cal day calID first byte calID next bite To restore the module 1 To place the module in calibration mode in write block word 32 set bit O to 1 2 Wait for the module to enter calibration mode read block word 1 bit 1 is set to 1 and the Cal Com LED flashes red 3 Set bit 1 the restore bit to 1 In read block word 1 bit 1 is set to 1 If the module has not previously been calibrated in read block word 1 bit 0 is set to 1 When the restore is complete in read block word 1 bit 14 is set to 1 restore data complete 4 In write block word 32 set bit 7 to 1 5 Wait for read block word 1 bit 4 to be set to 0 6 To exit calibration mode in write block word 32 reset bit O bit 1 and bit 7 to 0 In read block word 1 bit 1 and bit 14 are set to 0 Editing the Configuration Calibration Block 9 Saving the Tare and Zero By default the WeighScale module typically stores the tare and zero Values in Non volatile values in internal memory These values are not included in read or Memory write block transfer data so they are not stored in the PLC processor data table This means that any time the module loses power the tare and zero values are reset You must repeat the tare and zero functions to restore the tare and zero values in use before power to the module was lost To avoid having to repeat the tare and zero functions you can store the current tare and zero values in non volatile memory
131. lected for the weight averaging is 4 which generates a total time delay on the module of 250ms For this example if a block transfer read were executed every I O scan the system response time would be T 250 85 35 20 200 690ms Therefore for this application example you could set a real time sample period of 900ms and use an 850ms timer to trigger the block transfer read instruction to save I O scan time and still meet the total system response time of 1500ms Publication 1771 6 5 117 March 1998 A 6 Writing Custom Ladder Logic Use this formula r _We We Are you using single density Series A mode Where F flow Wc weight from current sampling period Wp weight from previous You don t sampling period need to P real time sampling period calculate the flow In double density Series B mode the module auto matically calculates the rate of change value Publication 1771 6 5 117 March 1998 Real Time Sample Period BTR Time out Once the module enters new data into the status block at the end of real time sample period it checks to see whether a block transfer read occurs during the following real time sample period If none occurs the module turns on the real time sample period BTR time out bit bit 1 of word in the status block If you find that the BTR time out bit in the status block is turned on you should either lengthen the real time sample period or shorten the
132. libration A method of calibration that eliminates the use of weights This method expects you to enter the scale sensitivity and output resistance for each load cell You get these values from the load cell supplier typically from the load cell certificate For an accurate calibration the scale sensitivity value must be to four digits to the right of the decimal point and the output resistance value must be to digit to the right of the decimal point See also calibration C2 calibration hard calibration tare Equal to the gross weight when you tare the scale See also gross weight display tare enable selection tare enable selection Sets or resets the net weight equal to zero See also net weight display unit of weight selection Tells you whether the weight is currently displayed in pounds or kilograms WAVERSAVER setting Sets the input noise frequencies to reject Only noise at frequencies below this value will be rejected This helps minimize process noise and give you a more stable weight reading zero enable selection Sets the gross and net weight values to zero See also gross weight display net weight display zero tolerance selection If the current weight is less than this value and the in motion tolerance is turned off you can set the gross weight and net weight to zero using the auto zero function or the zero enable function See also auto zero gross weight display net weight display zero enable s
133. ls enter the number of load cells used in the scale Digits ie Hight at Docs Paint Selecting the Decimal Point Location in this field do this Digits to Right of Decimal Point enter the number of digits 0 6 to the right of the decimal point you want to be displayed on all weight display and entry fields When you select a decimal point location you specify the number of digits 0 6 to be located to the right of the decimal point in weight display and entry fields When you enter calibration or setpoint weights you can enter only as many digits to the right of the decimal point as this setting specifies Publication 1771 6 5 117 March 1998 Using WeighScale Configuration Software to Configure the Module 8 5 braten Tab Eg For example if gross weight as measured by the scale 90 7725765 and decimal point location 2 then gross weight displayed 90 77 Important When you change the decimal point location calibration weight values are not automatically adjusted You must recalibrate the scale Failure to recalibrate the scale will result in gross and net weight displays being incorrect by a factor of whatever you changed the decimal point location to Determining the decimal point loacation To determine the correct decimal point location consider the following Weight values are limited to six digits regardless of the decimal point location This means that if you specify 2 places to the right
134. lues 1 Reading 6 DigitInteger Values C 1 Implied Decimal Point 1 Status BOCK aasan saqsa ka hac C 2 Publication 1771 6 5 117 March 1998 toc vi Table of Contents Specifications Appendix D Glossary Index Publication 1771 6 5 117 March 1998 What Is the Weigh Scale Module WeighScale configuration software 4 is NOT included with the module Series YOU must obtain it separately We tell you how in Chapter 4 Getting Started with WeighS cale Configuration S oftware Personal Computer with WeighScale Configuration Software y Chapter 1 Overview of the Weigh Scale Module This chapter provides an overview of the WeighScale module The Weigh Scale module 1771 WS is an intelligent I O module that reads values from industry standard strain gage load cells The module accepts analog weight values directly from a single load cell or the sum of the values from two three or four load cells connected through a junction box You can use as many as eight load cells with the module You will need an external power supply for five or more load cells The module receives block transferred configuration and calibration values from the PLC 5 data table The module block transfers the weight values and other status values to a PLC 5 processor The WeighScale module can work without We
135. m one project to another 7 4 Monitor screen accessing 10 1 entering data 10 2 using 10 1 viewing data 10 2 monitoring status data C 1 mounting 12 5 mounting positions 2 7 moving average sample size selecting 8 8 moving from one project to another modules 7 4 net weight C 1 defined See gross weight tare value Publication 1771 6 5 117 March 1998 Index Publication 1771 6 5 117 March 1998 new data A 5 number of digits defined 6 4 number of samples defined 6 4 0 on board resistance 12 2 defined G 4 online help 4 7 output image table A 1 overview 1 1 P password changing 5 6 piping 12 6 PLC address defined G 4 PLC processors 4 4 power requirements 2 3 pre installation considerations 2 1 preact A 29 defined G 4 preact value defined See setpoint privilege categories 5 2 privileges 5 4 5 5 process weighing 1 1 processor 1 3 programming block transfer A 7 A 9 programming example A 9 A 17 project copying an existing 6 4 documenting 11 1 entering or modifying description 6 5 printing 11 2 viewing 11 1 project file 6 1 creating a new 6 1 deleting 6 2 opening an existing 6 2 project files displaying 6 3 renaming 6 3 Sorting 6 3 Project screen defined G 4 projects managing 6 1 purpose P 1 R rate of change settings selecting 8 7 rate of change 35 A 36 defined See ROC evaluation period A 35 evaluation perio
136. mV V industry standard load cells and C2 Second Generation Calibration load points 20 bit A D conversion providing 985 000 counts of displayed resolution over the 0 30mV range 50ms A D conversion period a weight in motion status indication Hardy Instruments WAVERSAVER technology to filter out mechanical vibrations and noise from the weight values 3 ways to calibrate the module hard calibration soft calibration to minimize the need for test weights when used with load cells of known sensitivity and range e C2 calibration to minimize the need for test weights and eliminate the need for manual entry of values when used with C2 Second Generation Calibration load points non volatile on board flash memory to store calibration values restoration of calibration values from PLC data table to non volatile on board memory lets you to quickly switch the calibration values to those of another scale or to restore them after replacing a module stand alone Windows based v3 1 v3 11 NT and 95 WeighScale Configuration software to provide configuration and calibration without ladder logic programming software on board diagnostics setpoints deadbands and preacts let you download values to the module so that the module can compare the scale to the setpoints without waiting for the PLC processor to cycle through ladder logic that depends on block transfers rate of change in weight data based on use
137. may be different to see an example of this refer to this figure on this page block transferwritelogic AB AM i block transfer read logic A 15 A 18 block transfer error alarms A 16 A 18 calibration logic A 17 A 19 taring the module A 18 A 19 zeroing the module A 19 A 20 block transfer write permissive logic 20 A 21 calibration logic A 21 A 22 changing WAVERSAVER logic A 22 A 23 verifying WAVERSAVER logic A 23 A 24 changing motion tolerance A 24 A 24 verifying motion tolerance A 25 A 24 changing zero tolerance A 26 A 24 verifying zero tolerance 27 25 alarm points 28 25 Publication 1771 6 5 117 March 1998 A 18 Writing Custom Ladder Logic Publication 1771 6 5 117 March 1998 Figure A 13 Block transfer write logic BTR ENABLED BTW ENABLED PLC PROGRAM BTW TRIGGER N155 0 N150 0 13 0 BTW 3I m BLOCK TRANSFER WRITE EN zs p 0 Rack 00 WEIGHSCALE SOFTWARE BTW TRIGGER Group 1 N13 0 Module 0 J ml Control block N150 0 ER 2 Data file N140 100 Length 49 Continuous N Figure A 14 Copying gross and net weight values to a floating point file BTR DONE BIT N155 0 COP COPY FILE Source N140 155 Destination 141 0 Length 2 Figure A 15 Block transfer read logic BTR ENABLED BTW ENABLED N155 0 N150 0 r BTR 111 BLOCK TRANSFER READ EN x 5 Rack 00 Group 1 0 Module 0 Control block N155 0 ER D
138. n like C2 calibration requires only one test weight You can use soft calibration on any manufacturer s load cells You need to know the sensitivity and output resistance for all your load cells You can get this information from the manufacturer s specifications or the load cell certificate Hard Calibration Hard calibration requires two or three accurate known test weights You can use hard calibration on any manufacturer s load cells You do not need to know the sensitivity and output resistance for your load cells Achieving calibration accuracy If you are using only a portion of your scale s range you can achieve the greatest calibration accuracy by performing a hard calibration choosing low middle and high test weights that cover the operating portion of your scale s range For example if you are using a 10 000 Ib scale but use it in the range of 2 000 5 000 Ib you could use test weights of 2 000 3 500 and 5 000 Ib Follow theses steps to access the Calibration Wizard from do this the Module List screen 1 Select the module you want to calibrate by highlighting it 2 Select Module Calibrate or click the right mouse button then select Calibrate the Configuration screen select Module Calibrate Using WeighScale Configuration Software to Calibrate the Module 9 3 gt Gross and net weight displays The Calibration Wizard displays the gross and net weight in real time values
139. n has found invalid configuration information in the PLC processor data table and is displaying default values for corrupt data Values updated from clipboard you have cut or copied configuration values from a module to the clipboard then pasted the values into a selected module on the Module List screen Understanding Configuration Messages You see these pop up messages on the Configuration screen if you have made configuration changes and try to close the Configuration screen then you are prompted to download your changes you performed an upload from the PLC processor and the PLC data table contains invalid configuration values When you click default values will replace corrupt values on the Configuration screen Verify configuration data and download it to the PLC processor Publication 1771 6 5 117 March 1998 8 12 Using WeighScale Configuration Software to Configure the Module Downloading Configuration Values Download gt Upload Calibrate Monitor Close Publication 1771 6 5 117 March 1998 PLC All configuration settings you make take effect only when you download to a file or to the PLC processor Important We recommend that you download configuration information to the processor and to a project file When you download to a project file configuration information is stored with the project file You can use the file to restore lost or damaged confi
140. nd lets you modify already existing modules or add new modules to the list Publication 1771 6 5 117 March 1998 G 4 Understanding 1771 WS Terminology Publication 1771 6 5 117 March 1998 net weight display Tells you the difference between the gross weight and the tare value See also gross weight display tare value number of digits selection Number of digits displayed to the right of the decimal point number of samples selection Number of weight samples module uses to calculate the average current weight on board resistance Disconnects the module input i e stops the module from reading weight values from the scale and forces the internal millivolt signal to 0 millivolts This is used to detect drift in the module preact Used to account for delay in shutting of feeders in the weighing system due to mechanical delays material in flight or other system delays PLC address Node number on the DH link of the PLC 5 processor for the module Project screen This screen is the first screen you see when you start WeighScale Configuration software From this screen you can create new projects open rename copy delete and print files view a list of files and projects change the order in which files are listed access the Security System screen goto the Module List screen login and logout of the system Understanding 1771 WS Terminology G 5 rate of change value The rate of cha
141. nge represents the rate of change in weight as measured by the module over a defined time period Can be used to track material flow This calculation is based on three parameters weight description defines the unit of measure for weight in rate of change calculations time units unit of measure for time in rate of change calculations evaluation period the time over which a rate of change calculations are made real time sampling period Tells the PLC processor how often to read the weight value from the module Used to provide a consistent change over time A T n the weight sample scale sensitivity Voltage value You get this value from the load cell supplier typically from the load cell certificate This value is used to calibrate the module setpoint The value or target value for turning feeders on and off The WeighScale Module supports two setpoints Each setpoint is made up of weight description defines the unit of measure for weight in setpoint calculations setpoint value target weight value e deadband used to separate the turn off weight At the actual switching point the deadband also prevents switching chatter preact value accounts for delay in the weighing system due to mechanical delays material in flight or other system delays Publication 1771 6 5 117 March 1998 G 6 Understanding 1771 WS Terminology Publication 1771 6 5 117 March 1998 soft ca
142. nnect the conductors and the shield to terminals on the remote termination panel as shown in Figure 2 3 Figure 2 3 Connecting Wires from the Junction Box to the Remote Termination Panel Using the Module generated Excitation and a Sense Loop t _ 10V Excitation _ 1 Sense 7 J Box s bi To Load Cell _ 0 30mV Weight Signal 1 C2 Cal T 1 S4 O4 S3 O3 82 O2 81 01 rH RTP A ATTENTION The C2 Cal connections apply only to those applications using C2 Second Generation Calibration load points The load cell manufacturer may specify a cable length under which a sense loop is not needed In that case and if you are not using an external power supply jumper the excitation signal to the sense signal at the termination panel as shown in Figure 2 4 When using C2 load cells connect the sense lines between the junction box and the remote termination panel Figure 2 4 Connecting Wires from the Junction Box to the Remote Termination Panel with the Module generated Excitation Voltage Jumpered to the Sense Input E 10V Excitation _ 01 Junction Box gt 0 30mV Weight Signal To Load Cell C2 Cal wa
143. nnection points Connect the sense conductors from the RTP directly to the connection points where the excitation voltage is connected at the load cell Use Table 2 A to determine connection points Table 2 A Connection Points RTP terminal if you use the modules if you use the modules if you use an external power designation excitation voltage and a excitation voltage and a supply for an excitation sense loop is needed sense loop is not needed voltage connect to connect to connect to 11 Excitation to junction box Excitation to junction box lon RTP Rl Sense from junction box I1 on RTP Sense from junction box 51 Shield Shield Shield 01 C2 Cal from junction box C2 Cal from junction box C2 Cal from junction box 1 2 Signal from junction box Signal from junction box Signal from junction box R2 Signal from junction box Signal from junction box Signal from junction box 52 Shield Shield Shield 02 C2 Cal from junction box C2 Cal from junction box 2 from junction box 1 13 Sense from junction box R3 on RTP Sense from junction box Publication 1771 6 5 117 March 1998 RTP terminal designation 1 These connection required when usi if you use the modules excitation voltage and a sense loop is needed connect to Excitation to junction box Shield ot Used ot Used Not Used Not Used round Not Used 5 apply only to those applications us ng C2 Second Generation Calibration Install
144. ns the 3 most significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL LO reference point Calibration Low Weight LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL LO reference point Calibration High Weight MSW This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL HI reference point Calibration High Weight LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit weight value used for the CAL HI reference point Calibration Midpoint Linearization Weigh MSW This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit weight value used for the MOD LIN reference point Optional Calibration Midpoint Linearization Weigh LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit weight value used for the MOD LIN reference point Optional Calibration Low Volts MSW This is the most significant 16 bits of the 32 bit floating point format volts value calculated for the CAL LO reference point Calibration Low Volts LSW This is the least significant 16 bits of the 32 bit floating point format volts value calculated for the CAL LO refe
145. nsity Series A mode e The module is in double density Series B mode Setpoint Weight Descriptor Error e0 Valid value entered for setpoint weight description e Value entered for setpoint weight description is invalid Valid values are 0 kilograms and 1 pounds Setpoint Value Error e0 Valid value entered for setpoint e1 Value entered for setpoint is invalid Valid values are 999999 through 999999 Deadband Value Error e0 Valid value entered for deadband e Value entered for deadband is invalid Valid values are 999999 through 999999 Preact Value Error e0 Valid value entered for preact e Value entered for preactis invalid Valid values are 999999 through 999999 Setpoint Setup Error e0 Valid setpoint setup e Improper configuration of setpoint preact and deadband RoC Weight Descriptor Error e0 Valid value entered for RoC weight description e Value entered for RoC weight description is invalid Valid values are 0 kilograms and 1 pounds RoC Evaluation Period Error e0 Valid value entered for RoC evaluation period e Value entered for RoC evaluation period is invalid Valid values are 1 millisecond through 32 767 seconds RoC Units Error e0 Valid value entered for RoC units e Value entered for RoC unit is invalid Valid values are 0 seconds 1 minutes and 2 hours Reserved Publication 1771 6 5 117 March 1998 C 8 Monitoring Status Data
146. on Software This chapter shows you how to install WeighScale Configuration software for the 1771 WS module WeighScale configuration software version 2 0 lets you configure calibrate and monitor your WeighScale modules 1771 WS Series B and higher Version 2 0 is compatible with versions 1 0 and 1 1 However You cannot open a project file that was created in a newer version of the WeighScale software in an older version of the software For example if you are using 1 1 of WeighScale software you cannot open project files that you created with newer versions of the software The software provides simple screens for viewing and modifying configuration parameters e operator screen for monitoring module operation and changing operating parameters such as setpoints e a ladder logic utility to minimize programming e installation over a network tips for using the software on all input fields not available in Windows 3 1 a Wizard to guide you through the calibration process Windows Compatibility WeighScale Configuration software is compatible with Microsoft Windows 3 1 and 3 11 Windows 95 and Windows NT 3 51 and 4 0 See page 4 4 for more on system requirements Publication 1771 6 5 117 March 1998 4 2 Getting Started With WeighScale Configuration Software Publication 1771 6 5 117 March 1998 Communication Software Compatibility WeighScale configuration software version 2 0 is
147. on continually set the tare value equal to the gross weight resulting in a zero value for the net weight Zero If this bitis on while the scale is in motion the attempt to zero while in motion error bit is turned on e0 Leave the gross weight value unchanged e Ifthe scale is notin motion and the gross weight the absolute value of the zero offset from the calibration zero point is within zero tolerance continually set the gross weight value to zero Decimal Point Location Enter this value to set the number of digits to the right of the decimal point for all weight integer values 0 through 6 Motion Tolerance MSW This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit value that defines the weight change that will trigger the in motion flag to be set The weight change is measured as the difference between the current average weight value and the average weight value sampled one second earlier 0 through 999 Motion Tolerance LSW This word contains the 3 least significant decimal digits stored in natural binary format of the 6 digit value that defines the weight change that will trigger the in motion flag to be set 0 through 999 Zero Tolerance MSW This word contains the 3 most significant decimal digits stored in natural binary format of the 6 digit value that defines the acceptable tolerance for zero weight 0 through 999 Zero Tolerance
148. ontrol bits address the low byte 0 and deadband 1 1 weight matches setpoint 2 within tolerance of preact 2 and deadband 2 11 HighByte 1007 LowByte 00 Input Image Table Publication 1771 6 5 117 March 1998 Writing Custom Ladder Logic The low byte of the input and output image word is used exclusively for block transfer address the WeighScale Module through byte 0 of the low I O group used for addressing the slot containing the module byte 0 of the 1 0 group used for addressing the slot containing the module if you configure the I O chassis for Ve slot addressing 1 slot addressing The high byte of the output image word is not used The high byte of the input image word is used exclusively for single transfer read this bit for bit 10 comparison result for setpoint 1 bit 11 comparison result for setpoint 2 Updating Weight Values The module s A D conversion period 1 50ms After each A D conversion the value of that sample is used together with the value of each of a specified number of preceding samples to calculate an average weight value to place into the status block The number of samples used to calculate the average weight is a value you specify 1 through 200 when you configure the module Important Although a number of samples is used to calculate an average before a weight value is put into the status block a new average is calculated after each sample
149. or re check your wiring If you are satisfied that your wiring is OK and the resistance values you read don t match the ratings of your simulator replace the simulator If the resistance values you read match the ratings of your simulator reconnect the cable from the module to the remote termination panel and check the block transfer communication with the PLC processor Publication 1771 6 5 117 March 1998 12 4 Troubleshooting the Module Checking Block transfer Communication Calibrating the Module to the Simulator Publication 1771 6 5 117 March 1998 To check the block transfer communication with the PLC processor 1 Check to see that the block transfer addressing is consistent with the addressing mode slot 1 slot or 2 slot on the I O chassis containing the Weigh Scale Module Ensure that the words in the block transfer control structures and read and write blocks in the data table are not being written over by some other ladder logic Check for errors reported in the block transfer control structures If you are addressing the module correctly and are receiving block transfer error indications replace the Weigh Scale Module with a spare Read the value in read block words 26 and 27 as you change the output of the simulator If this value does not change check the status of bits 3 and 4 in word 0 of the read block If either of these bits is on indicating over range of under range r
150. or serial network e WeighScale Configuration software communicates with PLC 5 processors over a network using a 1784 KT B 1784 KL 1784 KTX 1784 KTXD or 1784 PCMK communication adapter If you are using DF1 protocol you can also communicate with the processor through a serial port e You can use RSLinx for Ethernet communication with the PLC 5 processor WeighScale Configuration software communicates through a DH port on an Ethernet PLC 5 processor To use WeighScale Configuration software your system must meet these requirements Hardware computer with an 80486 or greater microprocessor atleast 16 Mbytes of RAM Hard drive with adequate free disk space 15 Mbytes or greater 1 44 Mbyte floppy disk drive or Internet connection for installing the software VGA or higher resolution adapter monitor with small fonts 640x480 800x600 1024x786 modes supported We recommend a Super resolution adapter monitor mouse e DH port on KT or KL type module serial port Ethernet port with RSLinx only Installing the Software Starting the Software Getting Started With WeighScale Configuration Software 4 5 Software Microsoft Windows 95 or NT 3 51 or 4 0 Microsoft Windows v3 1 running in 386 enhanced mode a permanent swap file of at least 20 Mbytes in size is recommended You can also use Microsoft Windows for Workgroups v3 11 WeighScale Configuration software Install
151. orming and likelihood of helping you isolate the problem At power up the module checks for correct RAM operation e EPROM operation e EEPROM operation During this self diagnostic check the RUN FLT fault indicator flashes green at a rate of 5 to 10 times a second We show the indicators in Figure 12 1 This self diagnostic check lasts from 2 to 30 seconds depending on the WAVERSAVER selection the lower the frequency the longer the time When it completes this check satisfactorily the RUN FAULT indicator stops this rapid flashing However if the module does not have valid calibration data the RUN FAULT indicator flashes green at a rate of once a second When it completes this check satisfactorily and the module has valid calibration data the RUN FAULT indicator becomes a steady green If a fault is found initially or occurs later the RUN FAULT indicator turns red The bottom indicator is the calibrate communication indicator This indicator flashes green when doing block transfers It flashes red during calibration Figure 12 1 Indicators indicator when green when red flashes 5HZ during self check at power up RUN FAULT flashes 1HZ after self check until valid solid a fault is calibration found solid after self check and valid calibration flashes during CAL COM flashes during block transfer Pais calibration Publication 1771 6 5 117 March 1998 12 2 Troubleshooting w
152. osoft Windows 3 1 95 or NT and are familiar with terms that describe what you should be doing when working in Windows e g double click radio checkbox Publication 1771 6 5 117 March 1998 2 Using this Document g What this Document Contains Publication 1771 6 5 117 March 1998 to learn about process weighing and module features This document contains 11 chapters and 4 appendices see this chapter 1 Overview of the Weigh Scale Module install the module and learn about emodule power requirements ekeying 2 Installing the Module echassis location ewiring of module and remote termination panel euse the ladder logic utility to minimize programming 3 Using the Ladder Logic Utility euse the interface to the MMI einstall WeighScale software elearn about hardware requirements for your computer Getting Started with elearn about software requirements for your 4 WeighS cale Configuration computer Software estartthe software euse online help learn about control of security eselect privilege categories eadd and delete users eedit privileges 5 the Security echange passwords pen eenable security elogin and logout create project files I ework with project files 6 Managing Projects eadd modules to a project e move a module from one project to another 7 Managing Modules e modify the Module List screen ing WeighScal euse the Module Configuration screen
153. oving average sample rate in increments of 1 or use the 2 keys The WeighScale module reads the signal from the load cell and calculates weight every 50 milliseconds To provide a more stable reading the module can calculate a moving average using a sample size from 1 200 you specify For example if you set the moving average sample size to 10 each reading is added to the previous 9 readings and the sum divided by 10 to determine the current weight Moving Average Sample Size setting scale response larger sample size slower response to weight changes more accurate reading noise and variation may be reduced when more samples averaged shorter sample size faster response to weight changes less accurate reading noise and variation may increase when less samples averaged Publication 1771 6 5 117 March 1998 Using WeighScale Configuration Software to Configure the Module 8 9 Sampling Perleit is Series E Hedale Denby binbir lanes kw Tiaa Selecting the Real time Sampling Period in this field do this Real time Sampling Period enter the real time sampling period in milliseconds from 50 to 10000 in increments of 0 5 or use the keys Enter a real time sampling period in milliseconds to control the period during which the module places new weight values into the block transfer read block If a block transfer read is not executed w
154. pper backplane connector See Figure 2 1 e Between 24 and 26 e Between 32 and 34 You can change the position of these keys if subsequent system design and rewiring makes insertion of a different type of module necessary Figure 2 1 Keying Positions Keying Positions Between 24 and 26 Between 32 and 34 1 0 chassis Upper Connector Publication 1771 6 5 117 March 1998 2 6 Installing the Module Installing the Module European Union Directive Compliance Publication 1771 6 5 117 March 1998 When installing your module in an I O chassis 1 Turn off power to the I O chassis ATTENTION Remove power from the 1771 I O chassis backplane and disconnect the cable from the module before removing or installing an I O module Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation Failure to remove power from the backplane could cause module damage degradation of performance or injury 2 Place the module in the plastic tracks on the top and bottom of the slot that guides the module into position 3 Do not force the module into its backplane connector Apply firm even pressure on the module to seat it properly 4 Snap the chassis latch over the top of the module to secure it If this product is installed within the European Union or EEA regions and has the CE m
155. prompt tells you that you must shut down and re start the application for security to be enabled Click on The security privilege selections take effect only after you enable security exit WeighScale software and return to Windows restart WeighScale software After security is enabled ausername password and the appropriate privileges are needed to use the software only the supervisor or someone delegated the privilege can disable security Once security is enabled you access WeighScale software functions by logging into the software 1 If itis not already started start the software You see the Weigh Scale Module Project screen 2 On the Weigh Scale Module Project screen from the Access pull down menu select Login You see the User Login dialog box genie 3 Enter your username and password 4 Click on To log out of the WeighScale software 1 Bring up the Weigh Scale Module Project screen 2 From the Access pull down menu select Logout 3 When the software prompts you if you are sure you want to log out click on Yes Publication 1771 6 5 117 March 1998 5 8 Supervising the Security System What to do Next To help learn how to create projects read Chapter 6 Managing Projects Publication 1771 6 5 117 March 1998 Chapter 6 Managing Projects Before you can begin using Weigh Scale Configuration software to configure and operate you
156. r Logic Utility 8 15 Mar OHIO EXP cio d ex aed VE EE DE ER Eq RP Red 8 16 Publication 1771 6 5 117 March 1998 toc iv Table of Contents Using WeighScale Configuration Software to Calibrate the Module Using the Module Monitor Screen Documenting Projects Troubleshooting the Module Publication 1771 6 5 117 March 1998 Chapter 9 Before You 9 1 Which Type of Calibration is Best for Your Application 9 1 C2 Callbfall l eke su hese HEC 9 1 Soft Calibralion 9 2 Hard u cbr RR wed wa ex e wean 9 2 Accessing the Calibration Wizard 9 2 Performing a Hard Calibration 9 4 Performing a Soft Calibration 9 5 Performing a C2 Calibration 4 1 9 6 Restorng a ux crt bp OU RR eS 9 7 Reading Ress aM B cua Qd vw bx te ib Oa ie d 9 8 Whatto do ed e Pared id en d Eee ade 9 8 Chapter 10 Accessing the 5 10 1 Viewing or Entering Data 10 2 What to do NER a vn dete emcee id deta 10 3 Chapter 11 Viewing 11 1 Printing P IO eC iussa decns tss nu pu E ate p haha 4 11 2 Whatto do MN us cid dob XR UR dope ER 11 2 Chapter
157. r defined time units evaluation period and unit of measure configuration data lets you view configuration data in the block transfer read data block To help learn how to install the Weigh Scale Module read Chapter 2 Installing the Module Preventing Electrostatic Damage Preparing to Install the Module Chapter 2 Installing the Module This chapter tells you how to install the WeighScale module Electrostatic discharge can damage semiconductor devices inside this module if you touch backplane connector pins or jumper pins Guard against electrostatic damage by observing the following warning ATTENTION Electrostatic discharge can degrade performance or cause permanent damage Handle the module as stated below Wear an approved wrist strap grounding device when handling the module Touch a grounded object to rid yourself of electrostatic charge before handling the module e Handle the module from the front away from the backplane connector Do not touch backplane connector pins Before installing your module in the I O chassis you must to see page set the jumper for single or double density mode 2 2 calculate power requirements for the I O chassis 2 3 determine module location in the 1 0 Chassis 2 3 determine remote termination panel location 2 4 plan for sufficient enclosure depth 2 4 key the 1 0 chassis for your module 2 5 Publication 1771 6 5 117 March 1998 2 2 Installing the Module P
158. r modules you must set up a project file and add your module s to the project This chapter shows you how to set up the project file What is Project File You can use a project file to organize or group modules for example all modules on a manufacturing line could be grouped in a project file The project file stores configuration information about the module s you added to the project The file can include any number of modules WeighScale Configuration software supports an unlimited number of project files gt Project files have a wsc extension Creating a New Project Follow these steps to create a new project file File 1 Start WeighScale Configuration Software You see the Project Manager screen rz w lists the project files in the D Yes Jools bp lists directories where gt Previeus Directaries selected directory empty project files are stored sam SS when the software is first empty when the software started is first started t Hl indicates the types of files by displayed in the file list Dus To change the selection from d i E the View menu choose All Files Project List or Select lists the full name and Deserigtian description of the project empty when the soft indicates the sort order of ware is first started the files in the file list by name type size or date To change the selection from the View menu
159. r the value in F 10 20 4 Toggle MMI ACCEPT LOW N9 1 6 on then off Important Step 5 below is optional and can be skipped 5 When MOD STS LOW GOOD N9 72 8 is set place the midpoint linearization weight on the scale and enter the value F 10 21 6 Toggle MMI ACCEPT MID N9 1 7 on then off 7 When MOD STS MID GOOD N9 72 9 is set place the high weight on the scale and enter the value in F10 22 8 Toggle ACCEPT HIGH N9 1 8 on then off 9 When MOD STS HIGH GOOD N9 72 10 is set toggle MMI ACCEPT CAL N9 1 9 on then off To cancel the calibration set MMI CANCEL CAL N9 1 10 soft calibration 1 Configure the module by using WeighS cale Configuration software or manually setting configuration parameters 2 Enter the sensitivity value in F 10 23 3 Toggle SOFT CAL N9 1 4 on then off 4 When MOD STS CAL MODE N9 71 1 is set place the low weight on the scale and enter the value in F 10 20 5 Toggle ACCEPT LOW N9 1 6 on then off 6 When MOD STS LOW GOOD N9 72 8 is set toggle MMI ACCEPT CAL N9 1 9 on then off C2 calibration Publication 1771 6 5 117 March 1998 1 Configure the module by using WeighS cale Configuration software or manually setting configuration parameters 2 Toggle MMI C2 CAL N9 1 5 on then off 3 When MOD STS C2 READ GOOD N9 71 12 is set place the low weight on the scale and enter the value in F 10 20
160. rce 4 Destination N140 100 1 WAVERSAVER CHANGE PERMISSIVE N13 0 L SET WAVERSAVER 50HZ 3 1 000 r MOV I MOVE 03 Source 8 Destination N140 100 1 WAVERSAVER CHANGE PERMISSIVE N13 0 127 SET WAVERSAVER 250HZ 3 1 000 1 I MOVE Lis 04 Source 16 Destination N140 100 1 WAVERSAVER CHANGE PERMISSIVE N13 0 L 3 Publication 1771 6 5 117 March 1998 24 Publication 1771 6 5 117 March 1998 Writing Custom Ladder Logic Figure A 23 Verifying WAVERSAVER changes WAVERSAVER CHANGE PERMISSIVE WAVERSAVER CHANGE PERMISSIVE 13 0 EQU N13 0 EQUAL 0 Source A N140 209 3 8 Source 140 100 1 Figure A 24 Changing motion tolerance CHANGE MOTION TOLERANCE PB 1 000 COP 1 COPY FILE 07 Source 3N140 4 Destination N140 104 Length 2 MOTION TOLERANCE CHANGE PERMISSIVE N13 0 1 10 Figure 25 Verifying motion tolerance changes MOTION TOLERANCE CHANGE PERMISSIVE MOTION TOLERANCE CHANGE PERMISSIVE 13 0 EQU EQU N130 1 H EQUAL EQUAL U 10 Source A N140 200 Source A N140 201 u 0 3 Source B N140 104 Source B N140 105 1 200 Figure A 26 Changing zero tolerance CHANGE ZERO TOLERANCE PB 1 000 COP 1 COPY FILE Hm Source 3N140 6 Destination N140 106 Length 2 ZERO TOLERANCE CHANGE PERMISSIVE N13 0 1 9 Figure A 27 Verifying zero tolerance changes ZERO TOLERANCE CHANGE PERMISSIVE N
161. rence point 5 Calibration High Volts MSW This is the most significant 16 bits of the 32 bit floating point format volts value calculated for the CAL HI reference point Calibration High Volts LSW This is the least significant 16 bits of the 32 bit floating point format volts value calculated for the CAL HI reference point word Monitoring Status Data C 7 description 24 25 26 27 28 29 29 9 15 Calibration Midpoint Linearization Volts MSW This is the most significant 16 bits of the 32 bit floating point format volts value calculated for the MID LIN reference point Optional Calibration Midpoint Linearization Volts LSW This is the least significant 16 bits of the 32 bit floating point format volts value calculated for the MID LIN reference point Optional Test Resistance Values MSW This word contains the 3 most significant decimal digits stored in natural binary format of a 6 digit raw input value for testing the module and troubleshooting the system Test Resistance Values LSW This word contains the 3 least significant decimal digits stored in natural binary format of a 6 digit raw input value for testing the module and troubleshooting the system Firmware Revision In ASCII A through 2 Firmware Series ASCII A through 2 Double Density Mode This word stores the jumper J 1 location e0 The module is in single de
162. ries as appropriate for the particular user 4 Select the privileges under each category as appropriate for the particular user Selecting privileges Clicking on All selects all listed privileges clicking on Select Nune deselects previous selections 5 Click on Publication 1771 6 5 117 March 1998 5 6 Supervising the Security System Changing a Password To change the password assigned for a user 1 At the Security System screen cursor to the username 2 Click on You see the Change Password dialog box JE Change Password MACHINE SETUP Ea Password Verify 1 3 Enter the new password 4 Re enter the password to verify it 5 Click on ox You can change your own password However if security is enabled and you try to change a password and if you are not the supervisor or do not have the Edit Users privilege you cannot change the password Enabling Security To enable security 1 At the Security System screen select the Security Enabled Disabled checkbox This is a toggle selection Security Seleri rer Click on the Security Enabled checkbox MACHINE SETUP Publication 1771 6 5 117 March 1998 Logging in Yee Hm Previas hka massa Hi De etree Logging out Supervising the Security System 5 7 2 The Information
163. ross Weight To illustrate how to zero the gross weight N140 150 CMP N13 0 I L COMPARE 77 8 Expression 6 F141 0 1 000000 Zero Es 2 5 1 000 06 06 6 1 000 N13 0 N140 102 Z 06 6 1 1 with this rung when the zero successful bit N140 150 8 is turned on and the first gross weight F 141 0 is less than 1 000000 we turn on bit N13 0 6 until the pushbutton is released we use a pushbutton switch input 1 000 06 to turn on the zero bit second N140 102 1 and hold it on through a hold in path Publication 1771 6 5 117 March 1998 Creating Setpoints Writing Custom Ladder Logic A 29 If you set the module for double density Series B mode it supports two setpoints Each setpoint is made up of weight description defines the unit of measure for weight in setpoint calculations Valid values for weight descriptions are 0 1 pounds e setpoint value target weight value Valid values for setpoint values are 999999 through 999999 e deadband used to separate the turn off weight At the actual switching point the deadband prevents switching chatter Valid values for deadband values are 999999 through 999999 preact value accounts for delay in the weighing system due to mechanical delays material in flight or other system delays Valid values for deadband values are 999999 through 999999 Example values are shown below Weight Descr
164. s are shown in Figure 2 2 Figure 2 2 Mounting Dimensions for the 1771 RT44 Remote Termination Panels 1771 RT 44 o 990000000000l5 L Publication 1771 6 5 117 March 1998 2 8 Installing the Module Connecting the Module to Use the 1771 NC6 or NC15 cable to connect the module to the Remote Termination the RTP Panel Step 1 Step 2 Step 3 n Insert connector into mating connector on Slide the locking bar down over the Place locking bar in up position the processor front panel mating pins on the module Locking bar To lock slide locking bar down 11 1 4 Connect the other end of the cable to the remote termination panel Use the thumbscrews on the 1771 RT44 panel to lock the connector in place odule End of 1771 NC cable DIN Rail RTP End of 1771 NC cable To Load Cell Publication 1771 6 5 117 March 1998 Installing the Module 2 9 Connecting the Junction You must provide a cable from the junction box to the RTP For this Box to the Remote cable if you are not using an external power supply and if the sense Termination Panel loop is needed you must co
165. s is the least significant 16 bits of the 32 bit floating point format setpoint 2 value Deadband 1 MSW This is the most significant 16 bits of the 32 bit floating point format deadband 1 value Deadband 1 LSW This is the least significant 16 bits of the 32 bit floating point format deadband 1 value Deadband 2 MSW This is the most significant 16 bits of 32 bit floating point format deadband 2 value Deadband 2 LSW This is the least significant 16 bits of the 32 bit floating point format deadband 2 value 1 MSW This is the most significant 16 bits of the 32 bit floating point format preact 1 value Preact 1 LSW This is the least significant 16 bits of the 32 bit floating point format preact 1 value Preact 2 MSW This is the most significant 16 bits of the 32 bit floating point format preact 2 value Preact 2 LSW This is the least significant 16 bits of the 32 bit floating point format preact 2 value word Editing the Configuration Calibration Block B 15 description N140 145 46 0 15 SP Weight Description This word stores the unit of measure for weight in setpoint calculations e0 kilograms e pounds RoC Time Units This word stores the unit of measure for time in rate of change calculations e0 seconds e minutes e2 hours RoC Evaluation Period This word stores the value for time over whic
166. s to report that status is not available While the software uploads information from the processor or the file it checks that each value is within the allowable range for that particular parameter If you are uploading data from a module that has never been configured the data table will contain random data Some values may be outside of the normal range If the value is outside allowable limits it is reset to the default value and you see a warning message The status bar at the bottom of the window indicates whether the values displayed on the screen are defaults uploaded from the processor or uploaded from a file Publication 1771 6 5 117 March 1998 8 2 Using WeighScale Configuration Software to Configure the Module Using the Module Configuration Screen Publication 1771 6 5 117 March 1998 Important ModuleMonitor screen theCalibration Wizard help you configure the module by interacting with an operating module In offline mode these tools will not work nor will they access configuration information from a file If you try to open the Monitor screen or Calibration Wizard without being connected to the processor you see an error message and the screen or wizard closes Use the Module Configuration screen to enter and view configuration data for the WeighScale module 1 On the Module List screen select the module you want to configure by highlighting it 2 Select Module Configure Or with
167. security is enabled and you try to view someone else s privileges and if you are not the supervisor or do not have the Edit Users privilege you cannot access the List Privileges screen You see the List Privileges screen Canary Ka Bad On Hood Firewre Lalibew nr From this screen you can view your own privileges For example the user Calibration Wizard can view calibration data calibrate a module read on board resistance and restore calibration data 3 When you are done viewing the privileges click on o Supervising the Security System 5 5 Deleting a User To delete a user from the security system 1 At the Security System screen cursor to the username 2 Click on Gelete Umer You see Please Confirm 9 Are you sure you want to delete user MACHINE SETUP 3 Click on Yes If security is enabled and you try to delete a user and if you are not the supervisor or do not have the Edit Users privilege you cannot delete a user Editing Privileges To edit privileges assigned for a user 1 At the Security System screen cursor to the username 2 Click on If security is enabled and you try to edit privileges and if you are not the supervisor or have the Edit Users privilege you cannot access the Edit Privileges screen You see the Edit Privileges screen 3 Select the privilege catego
168. t Preview Offline File Values 3 On the print dialog box that appears click on one of the following to click on include all modules in the project in the report All include only the selected module in the report Selection 4 Click on The is displayed on the screen Publication 1771 6 5 117 March 1998 11 2 Documenting Projects Printing a Project To print a project 1 On the Project Manager screen select the project you want to print by highlighting it Save 2 Print the project on line or offline Save as Description A To print values from the PLC processor select Configure Workstation Project Print Online PLC Values ET a B To print values from a file select m Aa Project Print Offline File Values Close AlF4 3 On the print dialog box that appears click on one of the following to click on include all modules in the project in the report All include only the selected module in the report 4 Check that all printer information is correct and click on What to do Next To help learn how to troubleshoot the module read Chapter 12 Troubleshooting the Module Publication 1771 6 5 117 March 1998 Diagnostics Reported by the Module RUNFLT O CALICOM Chapter 1 2 Troubleshooting the Module This chapter gives you information for troubleshooting your system We list these in order of ease of perf
169. tance from excitation to excitation and from signal to signal 5 Compare these values with the resistance ratings of your load cells Remember that if you have multiple load cells connected through a junction box they are connected in parallel therefore the total resistance would be RL Where R Rr the total resistance R the resistance per load cell N the number of load cells For example if 4 load cells are each rated at 350 00 the total resistance would be 87 50 at the junction box If the distance between the junction box and the remote termination panel is significant the resistance measured at the remote termination panel because of resistance in the wiring If the resistance doesn t match the rating and the wiring is OK replace load cells until you find the one that is faulty If the resistance does match check the load cell mounting Check to see that none of the load cells are mounted upside down By load cell we mean specifically the device in which the strain gageis mounted not the mounting assembly Also check to see that the load cells are free from any binding If the mounting seems to be OK try disconnecting the piping Publication 1771 6 5 117 March 1998 12 6 Troubleshooting the Module Calibrating with Piping Disconnected Troubleshooting Load Cells Publication 1771 6 5 117 March 1998 Try calibrating the module with piping disconnected 1 Disconnect all piping from your vesse
170. te The file is too large for a single diskette download the software to the computer you will access over a network the WeighS cale configuration software file for Windows 3 1 3 11 95 or NT systems Important Do not copy this file to a diskette The file is too large for a single diskette install the software from diskettes diskette image files Important For Windows 3 1 or 3 11 installations you will need the Win32s utility included with 3 1 and 3 11 files Publication 1771 6 5 117 March 1998 4 4 Getting Started With WeighScale Configuration Software Communicating with PLC 5 and ControlNet Processors over the DH and Ethernet Networks System Requirements Publication 1771 6 5 117 March 1998 Ordering Software by Mail or Telephone The WeighScale module ships with a reply card you can use to order configuration software on diskettes You do not need to specify the operating system when you order diskettes The diskettes can be used with any of the supported operating systems To order diskettes complete the card and mail it to the address show or call the toll free number shown on the card When using WeighScale Configuration software remember e WeighScale Configuration software is compatible with 1785 PLC 5 processors It is not compatible with PLC 5 250 processors Weigh Scale Configuration software is compatible with ControlNet processors over a DH
171. te termination panel 2 7 software 4 1 installation procedure software 4 5 installing cables 2 8 installing the module 2 1 installing the utility software 4 1 integer values C 1 J jumper 1 2 2 2 junction box connections 2 9 K keying 2 5 keying positions 2 5 L ladder logic writing custom A 1 ladder logic utility changing defaults 3 3 data table layout 3 5 symbolic names used by 3 6 using 3 2 leakage 12 7 list privileges 5 4 load cells 12 5 repairing 12 7 selecting the number of 8 4 troubleshooting 12 6 ocation for the module 2 4 ogin 5 7 ogout 5 7 ow calibration weight defined See C2 calibration hard calibration soft calibration ow voltage 2 6 Index 1 3 managing projects 6 1 manual organization P 2 messages configuration 8 11 download 8 10 upload 8 11 midpoint linearization weight defined See hard calibration MMI supplied with WeighScale software 3 4 using interface to 3 4 modifying Module List screen 7 5 module configuring 8 1 8 3 restoring B 8 module configuration screen using 8 2 module density viewing 8 9 module installation 2 1 2 6 module list 6 1 module list configuration 6 1 Module List screen defined G 3 modifying 7 5 module location 2 4 module status viewing 8 9 modules adding to a project 7 2 7 3 deleting from Module List screen 7 7 entering or modifying description 7 6 managing 7 1 moving fro
172. ted report for you project or module read Chapter 11 Documenting Projects Publication 1771 6 5 117 March 1998 10 4 Using the Module Monitor Screen Notes Publication 1771 6 5 117 March 1998 Viewing a Project Gaye ltl Save as Description Configure Workstation Print Print Preview Online PLC values Printer Setup Ofline File values Close Al F4 Chapter 1 1 Documenting Projects This chapter shows you how to use WeighScale Configuration software to view or print descriptive reports for each project or module as well as the values of all configuration parameters Each section of the report includes e a header showing the name of each item and its descriptive information e alist of all parameters e the current value of each parameter The reports can display data values on line from the PLC processor or offline from a file to do this use the print preview option select view reports on screen f Project Print Preview print reports to a printer attached to your computer use the print option select Project Print To view a project 1 On the Project Manager screen select the project you want to view by highlighting it 2 View the project on line or offline A To view values from the PLC processor select Project Print Preview Online PLC Values B To view values from a file select Project Prin
173. tion high read bit is off or the the scale is in motion e The values for CAL HI reference point have been successfully recorded Calibration Low Volts Error e0 A calibration low value was entered within the range of 1 0mV V through 5 0V V e A calibration low value of less than 1 0mV V or greater than 5 0V V was entered Midpoint linearization Volts Error e0 A midpoint linearization value was entered within the range of 1 0mV V through 5 0V V e A midpoint linearization value of less than 1 0mV V or greater than 5 0V V was entered Calibration High Volts Error e0 A calibration low value was entered within the range of 1 0mV V through 5 0V V e A calibration low value of less than 1 0mV V or greater than 45 0V V was entered Reserved Configuration in Change Forthe first seven seconds after the module is powered up or when you change WAVERSAVER settings the module reports a busy state Do not attempt BTRs BTWs or try to access values Gross Weight 16 bit Integer Format This is the current average gross weight value It can be in the range of 32 768 through 32 767 Use this value in applications for which 16 bit resolution is adequate Net Weight 16 bit Integer Format This is the current average gross weight value It can be in the range of 32 768 through 32 767 Use this value in applications for which 16 bit resolution is adequate Publication 1771 6 5 117 March
174. uble density Series 8 916 Number of Read Block Words eSingle density Series A 29 Double density Series 64 Number of Write Block Words eSingle density Series A 033 Double density Series 949 Inputs esense 5 dc 4 596 10V dc 5 differential esignal 0 3mV through 30 3mV dc eC2 Cal Outputs eexcitation 10V dc 5 1 5W maximum A D Conversion Period 50 ms Resolution Reported e nternal 91 985 000 for 3mV V load cell 91 656 000 for 2mV V load cell 91 1 048 576 Non Linearity 0 0040 of full scale maximum Common Mode Rejection 100dB at or below 60Hz minimum Common Mode Voltage Range E2 5V dc Continuous Input Voltage 40 0V dc maximum Typical 100nV C Offset Drift Maximum 300nV C A Typical 3 ppm C Maximum 13 ppm C Electrical Isolation between I O 1 000V circuits and backplane logic circuitry Max Backplane Current Load 15 Publication 1771 6 5 117 March 1998 D 2 Specifications Publication 1771 6 5 117 March 1998 Conductors Wire Size Category per load cell manufacturer s specification in a stranded conductor shielded cable 1 Environmental Conditions eOperating Temperature eStorage Temperature eRelative Humidity e to 60 C 32 to 140 F e 40 to 85 C 40 to 185 F 5 to 95 without condensation Keying Between 24 and 26 Between 32 and 34
175. ublication 1771 6 5 117 March 1998 Editing the Configuration Calibration Block 3 Perform the Hard Calibration To perform a hard calibration 1 To place the module in calibration mode in write block word 32 set bit 0 to 1 In read block word 1 bit 1 is set to 1 to indicate the calibration mode If the module has not previously been calibrated in read block word 1 bit O is set to 1 2 Perform a CAL LO A Place the calibration low weight value in words 14 and 15 Be sure to observe the correct decimal point location CAL LO read B With the low calibration weight or no weight on the scale in write block word 32 set bit 4 to 1 If no errors occur in approximately 12 seconds read block word 2 bit 8 is set to 1 CAL LO successful C In write block word 32 reset bit 4 to 0 3 Optionally perform a MID LIN A Place the calibration low weight value in words 16 and 17 Be sure to observe the correct decimal point location B With the midpoint linearization calibration weight on the scale in write block word 32 set bit 5 to 1 If no errors occur in approximately 12 seconds in read block word 2 bit 9 is set to 1 MID LIN successful C In write block word 32 reset bit 5 to 0 4 Perform a CAL HI A Place the calibration high weight value in words 18 and 19 Be sure to observe the correct decimal point location B With the high calibration weight on the scale in write block word 32 set bit
176. ublication 1771 6 5 117 March 1998 Set the Jumper for Single Density or Double Density Mode When you received the module the J1 jumper was configured for Series B or double density mode The Series B module has a label on its side You can set the jumper for single Series A or double density Series B mode if you select then single density Series A the module has Series A functionality double density Series B you can e use setpoint parameters e retrieve rate of change values e verify configuration data Remove the module cover to access the J1 jumper Top View Rear ll Front Double Density Rear Front Single Density Then set the jumper as shown in the following illustration to set the module for this mode set the J1 jumper to look like this single density Series A double density Series Installing the Module 2 3 Calculate Backplane Current Load for the I O Chassis Your module receives its power through the 1771 I O chassis backplane from the chassis power supply The maximum backplane current load of the module is 1 5A Add this load to the loads of all other modules in the I O chassis This total must not exceed the chassis backplane or backplane power supply load specification Determine I O Chassis Addressing Mode Your J1 jumper selection determines the addressing mode of the Weigh Scale Module If the jumper is set for this The mod
177. ule is compatible with this addressing mode slot 1 slot 2 slot single density Yes rack 1 Yes double density Yes Yes No 1 Ifthe jumper is not present the module is compatible with slot 1 slot and 2 slot addressing and defaults to Series A functionality When the J1 jumper is set for double density Series B operation the module is not compatible with two slot addressing Publication 1771 6 5 117 March 1998 2 4 Installing the Module Publication 1771 6 5 117 March 1998 Determine Module Location the I O Chassis The extreme left slot is not an I O module slot it is reserved for processors or adapter modules If you are using 1 2 slot addressing you can place your module into any I O module slot of the I O chassis e If you are using 1 slot addressing do not place the 1771 WS module into the same even odd module slot pair with a 32 bit density module This module uses the input image table and the output image table To minimize electrical noise interference group analog and low voltage dc digital modules away from ac modules or high voltage dc digital modules Using earlier versions of the module If you are using a version of the module earlier than Series B ora Series B module set for Series mode and are using 2 slot addressing do not place the 1771 WS module into the same I O group even odd module slot pair with a 16 bit density module This module uses a byte in the input image t
178. value failure occurs status block word 1 bit 13 is set The value is out of tolerance You see an error message in the status window on the screen The module is not operating properly Contact your Rockwell Automation representative 5 When you are finished reading resistance click on Finish To help learn how to interpret status information returned by the WeighScale module read Chapter 10 Using the Module Monitor Screen Accessing the Monitor Screen Chapter 1 0 Using the Module Monitor Screen This chapter tells you how to monitor and control WeighScale module operation using the Monitor screen You can also view status data directly from the data table See Appendix C of this manual for more information on monitoring status data from the data table monitor and control a module access the Monitor screen 1 On the Module List screen select the module you want to monitor by highlighting it 2 Select Module Monitor 1 With the mouse pointer over the module list click the right button to display the pop up Module menu 2 Select Monitor You see the Monitor screen Heii Hum Caren Brew Bewinifo Genes Weight Fa Deadar 1 00 82 Fate ol charage 0 kg d Bee Psst fo rr kd m jn n T Kg Dretara 2 10 Zero Tee
179. ve the ground wire and test with only the 4 live leads If it tests OK with the ground wire removed after failing with the ground wire included the cable probably has an insulation problem Repairing failed load cells If the load cell needs to be returned to the factory for further examination or repair be as detailed in the description of the failure as possible As an example if the load cell has drifted mention the circumstances Does it drift with load without load under temperature variation etc Only factory technicians should perform any additional tests and make repairs Publication 1771 6 5 117 March 1998 12 8 Troubleshooting the Module Notes Publication 1771 6 5 117 March 1998 Writing Custom Ladder Logic In this chapter we describe what you need to know to write custom ladder logic for the WeighScale module gt Also refer to Appendix B Editing the Configuration Calibration Block Addressing the In double density Series B mode I O data is both single and block WeighScale Module transferred between the WeighScale Module and the PLC processor The module uses a word of input image table and a word of output image table Output Image Table 17 High Byte 1007 LowByte 00 17 Reserved Reserved Is Ae canes For single transfer control read from block transfer instructions tpl OE an ae ad the high input byte c
180. want to change on the fly through your ladder logic from operator panel switch inputs You can generate block transfers to and from the WeighScale Module To generate a block transfer to the 1771 WS module your ladder logic must execute a block transfer write instruction To generate blocktransfer from the 1771 WS module your ladder logic must execute a block transfer read instruction After you have edited your ladder logic file you can use WeighScale Configuration software to specify the block transfer write trigger address and enable the bit Publication 1771 6 5 117 March 1998 A 8 Writing Custom Ladder Logic Publication 1771 6 5 117 March 1998 These examples apply to a WeighScale Module located in the 0 slot of I O group 1 of I O rack 0 the processor resident local I O chassis with a configuration and calibration block starting at N140 100 and a status block starting at N140 150 Therefore with these arbitrarily chosen starting addresses for these blocks and arbitrarily chosen addresses for digital I O we use the following addresses in these examples this is the address of N140 100 the first word of the configuration and calibration write block N140 100 0 the write block bit to select a frequency rejection level of 7 50 Hz N140 100 1 the write block bit to select a frequency rejection level of 3 50 Hz N140 100 2 the write block bit to select a frequency rejection level of 1 00 Hz
181. when it is labeled Cancel you see a message warning you that setpoint deadband and preact values have been changed but not downloaded What to do Next Using the Module Monitor Screen 10 3 1 om These field are active only with Series B or later modules eries only in this field do this Current Setpoint 1 view the current values for setpoints 1 and 2 Current Setpoint 2 Setpoint 1 indicator Setpoint 2 indicator View the indicator glows red when the corresponding setpoint status output from the module is on This occurs when the net weight is greater than the setpoint plus the preact value Current Deadband 1 Current Deadband 2 view the weight value in use for deadbands 1 and 2 Current Preact 1 Current Preact 2 view the weight value in use for preacts 1 and 2 New Setpoint 1 New Setpoint 2 enter a new value for setpoint 1 or 2 takes effect after it has been downloaded to the module New Deadband 1 New Deadband 2 enter a new value for deadband 1 or 2 takes effect after it has been downloaded to the module New Preact 1 New Preact 2 enter a new value for preact 1 or 2 takes effect after ithas been downloaded to the module Download Press the button to download new setpoints deadbands or preacts to the PLC processor If security is enabled you must have the Update Setpoints privilege to perform this operation To help learn how to produce a prin
182. y an existing project Project 1 Select the file to be copied New CuhN 2 Select File Copy Open Cth IU 3 In the dialog box that appears select the directory to which you Con Chis want to copy the file Create directory Remove directory from list 4 Type a filename for the copy of the project Delete Delete 5 5 5 Click Exit Creating a New Directo ry To create a new directory either use Windows Explorer or File Manager or follow these steps 1 Select File Create Directory New CN DRESDEN 2 In the dialog box that appears enter the directory pathname Rename Chive 3 Click on ox The new directory is automatically added Create directory I Remove directory from list to the Previous Directories list Delete Delete Exit p Removing a directory from the Previous Directories list To remove a directory from the the Previous Directories list highlight the directory From the File menu select Remove Directory from List Publication 1771 6 5 117 March 1998 Managing Projects 6 5 Entering or Modifying the You can enter descriptive information for a project to be used when Project Description you print reports To modify the project description 1 On the Module List screen select the project you want to modify Save CWhS by using your cursor to highlight it Save as 2 Select Project Description Descr
183. you aware of safety considerations ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death property damage or economic loss Attention statements help you to identify a hazard avoid the hazard recognize the consequences Important Identifies information that is critical for successful application and understanding of the product The following are trademarks of Rockwell Automation PLC PLC 5 WeighScale DH Control View PanelView PLC 5 250 and INTERCHANGE RSLinx and RSLogix are trademarks of Rockwell Software Inc The following are registered trademarks of Microsoft Corporation Microsoft and MS DOS The following are trademarks of Microsoft Corporation Windows and NT WAVERSAVER is a registered trademark of Hardy Instruments Inc C2 is a trademark of Hardy Instruments Inc Ethernet is a registered trademark of Digital Equipment Corporation Intel and Xerox Corporation is a trademark of International Business Machines Corporation All other trademarks are property of their respective owners Summary of Changes New Information Summary of Changes The information below summarizes the changes to WeighScale Configuration software since the last release Revision bars in the page margins indicate updated information The table below lists new features and shows where to find this new information for this

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