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Very High Speed Counter Module

1. In This Chapter In this chapter you will learn about the input output data table of your 1734 VHSC24 and VHSC5 For more information about See page Data Table 3 1 Detailed Description of Data Table Information 3 2 Output Data 3 5 Configuration Data 3 6 Communicating Real Time Non real Time Information 3 11 Data Table The following table shows the complete format of the input output data 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0 Input Information Present Channel Data 32 bit Value of the present counter state Stored Channel Data 32 bit value of the stored accumulated count Status PE EF NR 0 FS FS OS OS O ZS BS AS C1 CO ZD 0 Programming Error Code PE 0 0 0 0 E10 E9 E8 E7 E6 E5 E4 E38 E2 El EO Output Information Counter Control 0 0 0 0 0 VR CP CR Output Control DS ES OE FO DS ES OE FO PWM Value 16 bit decimal value with range from 0 9500 0 95 00 Configuration Information Counter Configuration Z MD MD MD CF CF CF CF Filter Selection 0 ZF BF AF FS FS FS FS Decimal Position 8 bit value used to modify the present channel data display Active Output Assembly Assembly number 0 105 or 106 Time Base PWM Period 16 bit value used to set the time base or PWM period Gate Interval 8 bit value used to set the gate interval Publication 1734 UMO003A EN P August 2000 3 2 Very High Speed Count
2. Agency Certification when product is marked CE marked for all applicable directives C Tick marked for all applicable acts DeviceNet compatible as certified by ODVA Inc 1 Off on delay is time from a valid output on signal to output energization On off delay is time from a valid output off signal to outpu deenergization 2 Use this conductor category information for planning conductor routing as described in publication 1770 4 1 Industrial Automation Wiring and Grounding Guidelines A active features per mode 1 10 assembly selection 3 8 3 11 base assembly mounting 2 1 C CE directives P 2 checking I 0 defaults 4 6 class instance attribute editor 5 2 class instance editor 5 1 commissioning a node 4 2 compare window on off values 3 10 configuration data 3 6 configuration software 4 1 connecting an output to a compare window 1 12 connecting outputs to compare windows 3 9 continuous rate measurement mode 1 2 continuous rate mode operation 1 7 counter control 3 5 counter mode 1 2 counter mode operation 1 2 counter type selection 3 6 D data table complete format 3 1 decimal position frequency or counter display 3 7 derating curve 1734 VHSC24 A 3 directives European Union P 2 E encoder mode 1 2 encoder mode operation 1 3 F feedback 1 1 filter selection 3 7 filter settings 1 1 format data table 3 1 G gate interval setting 3 8 Index indi
3. 0 0 0 0 eee eee ee 1 7 Rate Measurement Mode 0 000 e eee ee 1 8 Pulse Width Modulation 0 0 0 0 0c e ences 1 8 New Data Indicator 2 9 408 ada tie he ead 4 052 1 9 Default ontisuration 25 2 o0 a4 Bes Su ee ao UN Baek 6 1 9 Operating Mode Features 0 0 0 00 e eee eee 1 10 Operating Mode Features 00 eee eee 1 10 Output Control sick aaa vee chewed dasae bhaeka ews 1 12 Chapter Summary i os eens Ste ate vee a ae en te eS 1 13 General 4 240023 tanoow eye cawyeteatas neta beau 2 1 Installing the Mounting Base Wiring Base Assembly 2 1 Installing an I O Module iacg lt coud pit ea oe ne BE eee en Fe we 2 2 Installing the Removable Terminal Block 2 4 Removing a Mounting Base 0 00 e ee eee eee 2 4 Wiring the 24V dc Very High Speed Counter Module 2 5 Chapter Summary 2 05 p2440 04 eee bi db rdaee Khdieeaens 2 6 In This Chapter decie ole olsen tydulaedieeedeax Aes 3 1 Date Lables 2a sti y a erates Tas eh eae oe 3 1 Detailed Description of Data Table Information 3 2 Present Channel Data Input Word 1 3 2 Stored Accumulated Channel Data Input Word 2 3 2 Module Channel Status and Programming Error Codes Input Words 3 and 4 e sonene mace bbad whats dean ekch bed ale 3 3 Output Data se ncn ce bik bab ti ERG bode S CAGE HERA aes 3 5 Counter Control Word 1 1 0 0 eee 3 5
4. Publication 1734 UM003A EN P August 2000 Preface 4 Publication 1734 UMO003A EN P August 2000 Operational Mode Zero Frequency Input Monitored Detection Counter No None Encoder No None Period Rate Yes Z Only Continuous Rate Yes Z Only Rate Measurement Y A Only PWM No None Preface About the Very High Speed Counter Modules Installing the Very High Speed Counter Module Very High Speed Counter Module Input and Output Data Table of Contents Important User Information 0 0 0 ee eee eee ee 2 Purpose of This Manual z o os Gute lene due dg eae attics P 1 Who Should Use This Manual 0 00000 P 1 Related Products and Documentation 4 P 1 European Communities EC Directive Compliance P 2 EMC DiTeCIVe 6d n AEE EEEE IE ERA EEA P 2 Low Voltage Directive ss a ett ath eet dara ooh cist p 2 Delimilions edryeh enara eines OeiG Ea E ER eet P 3 General errieta ides E At E E OE 1 1 Introducing the Very High Speed Counter Modules 1 1 Module Overview 0 0 cece eee eee eee 1 1 Functional Overview 2 28 2 peeiee ae olen P56 eee eas 1 1 Operating Modes vaccine ey ead cena Pea ae hee SS 1 2 Counter MOd6 450 0 asi a ed dae an aA 1 2 Enc der MOOS itn 0S ata td toe A te Beith ole Matt 1 3 Period Rate Moder retest etape 244 eee Pine soe eee 1 5 Operation Ol ocalar 24 5140 cue avee a hate tdadww ews 1 6 Continuous Rate Mode
5. Typically requires a shunt resistor across the load to detect 3 levels of current input states e Open Wire Off Device e Off Wire OK Device Off e On Wire OK Device On This method does not check the input against a time base only that the device wiring current loop is intact Missing Pulse Typically uses an input pulse to reset a watchdog timer fixed or programmable HW This method does detect Lead Breakage since a broken wire will time out the watchdog Zero Frequency Typically uses an input pulse to calculate an input frequency and verify it is above an error threshold This method does detect Lead Breakage since a broken wire will generate a OHz frequency Missing Pulse or Zero Frequency will also detect a customer device stuck high or low since the counter is monitoring for a change in the input state Currently the Counter Encoder Modes do not have Zero Frequency Detection the A amp B inputs are time independent only looking for input edge changes to increment decrement the count value The Period Rate and Continuous Rate modes do have Zero Frequency Detection since the Z input is monitored for Zero Frequency in Firmware A and B inputs not used and not monitored The Rate Measurement mode inherently has Zero Frequency Detection since no A pulses in any sample period are OHz B and Z inputs not used and not monitored
6. Reproduction of the contents of this copyrighted publication in whole or part without written permission of Rockwell Automation is prohibited Throughout this manual we use notes to make 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 e identify a hazard e avoid a hazard e recognize the consequences IMPORTANT Identifies information that is critical for successful application and understanding of the product Allen Bradley is a trademark of Rockwell Automation Preface Purpose of This Manual Who Should Use This Manual Related Products and Documentation This manual describes how to install configure and troubleshoot your Very High Speed Counter module For Information about See About the Very High Speed Counter Chapter 1 Modules Installing the Very High Speed Counter Chapter 2 Module Very High Speed Counter Module Input and Chapter 3 Output Data Configuring Your Very High Speed Counter Chapter 4 Module Accessing Instantiated Instances Chapter 5 Troubleshooting with the Indicators Chapter 6 Specifications Appendix A You must be able to use RSNetworx software or similar configuration software to set up and calibrate these modules You must have the capability to download and use Electro
7. 4 3 IMPORTANT down your system before the change takes place If you commission a node online you must power lt DeviceNet RSNetWorx for DeviceNet File Edit View Network Device Tools Help als S 4B alk rE es Hardware x B DeviceNet a LO Categoy BD AC Dive 8 Barcode Scanner 5 Commuricston Adapter j 1756 DNB A 1761 NET DNI Device Net H 1761 NET DNI Series B De 1747 SDN Scanner Module 1770KFD RS232 Interface f 1771 SDN Scanner Module Bt 1784 CPCIDS DeviceNet S IE 1784 PCD PCMCIA Intertac IE 1784 PCDS Scanner Bf 1784PCID DeviceNet Inter Bf 1784PCIDS DeviceNet Sc 1788 CN2DN Linking Devic 1 E 1794ADN DeviceNet Flex I E Modular DSA H DeviceNet to SCANport EDS Wizard LELI 1755 ao Do Current S MIA 1734 VHSC24 2 1734 VHSCS A Node Commissioning ul 1734 L A 1734 IK A Select a device by using the browsing service Go to the pulldown Tools Select Node Commissioning Click on Browse ettings Address Data Rate Device or Network Selection MAC ID E4 he Tass New Setting TT want to input the MAC ID for the selected network Select the module to change The node commissioning screen returns It disp node number and data rate on an active LIER fke effect unti power Soj Na te Messages Workstation M44737 Execute the Node Co
8. If you select Instance 101 polled connection the screen will look like this 38 Service Class Instance Attribute Editor Node 40 1 Type in the instance number here This is an example of assembly number 102 0x66 The class is always 4 and the attribute is always 3 2 Click on execute 3 Data received and status information is recorded here 4 Click on Close to finish Accessing Instantiated Instances 5 3 Assemblies Available assemblies are e Assembly 101 is produced for a polled connection e Assembly 102 is produced for a Change Of State COS connection e Assemblies 103 104 107 and 108 are by Explicit message only e Assemblies 105 and 106 are consumed in a polled connection as directed by parameter 4 Data may be read get or written set using an Explicit Message For example to read the Present Channel Data assembly 10149 6516 can be requested Data is ordered as followed byte 0 is the least significant byte 8 bit byte Byte 0 16 bit word Byte 0 byte 1 32 bit long word Byte 0 byte 1 byte 2 byte 3 In this example assembly 101 OE Get 04 Assembly 65 Present Data 03 Data Attribute Instances Services Field Bytes 101 0x65 Get Present Channel Data 4 Status 2 102 0x66 Get Stored Channel Data 4 Status 2 103 0x67 Get Present Channel Data 4 Stored Channel Data 4 Status 2 104 0x68 Get Pro
9. Network 4 2 Setting the Counter s Parameters 4 4 Checking 1 0 Status and Viewing Editing 4 6 the EDS File You must use the RSNetworx for DeviceNet software to configure your module You can configure the module while it is online or o offline This chapter shows configuration in the online mode Configuration screens appear similar in both modes The primary difference is that if you make changes offline you must go online before the configuration changes take effect Adding the Adapter to Your Network Follow these steps 1 Start the RSNetworx for DeviceNet software Publication 1734 UM003A EN P August 2000 4 2 Configuring Your Very High Speed Counter Module 2 Add the communication device as shown below Cin this case the chosen device was a 1770 KFD RS232 Interface DeviceNet RSNetWorx for DeviceNet Eile Edit View Network Device Tools Help as A S smew e eik sma Hardware y z DeviceNet a 8 Category 1 Click here to expand the list The scanner appears of communication adapters Double click here to choose the scanner You can also click and drag the scanner 1771 SDN Scanner Module name onto the network 1784 CPCIDS DeviceNet S I 1784 PCD PCMCIA Interfac Make sure you choose the 1734 ADN Point I O Scanner e E AC Drive Barcode Scanner Communication Adapter 4 1747 SDN Scanner Module on the network 1756 DNB A 1761
10. Output Control Word 2 2 ee eee 3 5 Pulse Width Modulation PWM Value Output Word 3 3 6 Publication 1734 UM003A August 2000 Configuring Your Very High Speed Counter Module Accessing Instantiated Instances Troubleshooting with the Indicators Specifications Publication 1734 UM003A August 2000 Configuration Data 24 253 d ae ane ra keene biiiee bhava dees 3 6 Counter Configuration Configuration Word 1 3 6 Filter Selection Configuration Word 2 3 7 Decimal Position Configuration Word 3 3 7 Active Output Assembly Configuration Word 4 3 8 Time Base Pulse Width Modulation PWM Period Configuration Word 5 0 eee eee ee eee 3 8 Gate Interval Configuration Word 6 3 8 Scalar Configuration Word 7 0 0 0 0 eee eee 3 9 Scalar Selection e toes qek E es a aaa 4 eB ne he 3 9 Output 0 1 Ties Configuration Words 8 and 9 3 9 Rollover Configuration Word 10 4 3 10 Preset Configuration Word 11 4 3 10 Counter ON and OFF Windows Configuration Words IZ OTI BS Oe eta OS Net og ot ER ort a Baal as AM leg 3 10 Safe State Values Configuration Words 20 through 22 3 11 Communicating Real Time Non real Time Information 3 11 Configuration Overview 0 cece eee eee eee 4 Adding the Adapter to Your Network 4 Adding I O Modules to Your Netwo
11. a user specified number of input signal pulses Each output is turned on as soon as the turn on count is reached and turned off as soon as the turn off count is reached As the internal 5MHz clock is counted the outputs dynamically track the 5MHz count Example of Continuous Rate Mode A Not Used Input A B Not Used 7 Input B Input Z Gate Reset 4 Encoder Pulse Generator Scalar 5 MHz Clk 1734 VHSC Z Input Pulse Frequency 5 MHz Internal Updated Here Sampling Clock Accumulated Count Outputs Updated Continuously Assumes symmetrical pulse 50 duty cycle so Period Sample Time On X2 On amp Off Frequency 1 Period If Count 20 Scalar 1 and Clock Period 1 5 MHz Frequency 1 20 1 X 1 5MHz X2 125 kHz As the frequency of the incoming pulse train at the Z Gate Reset terminal increases the number of sampled pulses from the 5MHz clock decreases Since accuracy is related to the number of pulses received over the sample period the accuracy will decrease with increasing frequencies at the Gate Reset terminal Refer to the Operation of Scalar information and table in the Period Rate Mode Publication 1734 UM003A EN P August 2000 1 8 About the Very High Speed Counter Modules Publication 1734 UMO003A EN P August 2000 Rate Measurement Mode The Rate Measurement mode determines the frequency and total number of input pulses over a user specified sampl
12. chapter shows configuration in the online mode Changes set in this mode take effect when you download to the individual module 1 Configure the modules as shown below te 17 34 VHSC5 A 1734 IJ 4 a Counter Module Counter Pt i n You can also left click on the module or name 2 Click on Properties to E and the property screen will pop up Delete Del Upload from Device Download to Device Class Instance Editor configure your adapter Publication 1734 UM003A EN P August 2000 Properties You will see a pop up screen with a series of tabs Each tab provides options view or edit The tabs are shown below and on the following pages These screens are for the 1734 VHSC24 module Identical screens are used for the 1734 VHSC5 module EX 1734 YHSC24 A Counter Module ixl General Device Parameters 1 0 Defaults EDS File 2 1734VHSC24 A Counter Module Name 734 VH5C24 A Counter Module These are the tabs you click on to Description view the options Address 40 m Device Identity Primary Vendo Rockwell Automation Allen Bradley 1 Device Specialy ono Product 1734 VHSC24 A Counter Module 14 Catalog fi 734VHSC24 4 Revision fcr E gt Cancel Epp Help Refer to the screens below for an explanation of its features The module s name appears here hs Description Type a description here The module s address app
13. module select Configuration and modify the parameters as desired for your application When complete download to A B Z Input Filter eee Decimal Position 0 your module by clicking on the 4 Active Output Assembly 0 Download to Device button ee PWM Period x ate Interval You can download each 7 Scalar 0 change as you make it using 8 Output 0 Ties o uo 9 Output 1 Ties 0 Single or download all your 10 Alaa iere changes using All Preset 100 Compare Window 1 ON Value Click here when finished Checking 1 0 Status and You can view the I O defaults setup and the EDS file by clicking on Viewing Editing the EDS PS Propriate tab File lt 1734 VHSC24 A Counter Module eix General Device Parameter Defaults EDS File ji e default 1 0 characteristics for this device The values are Click on the 1 0 Defaults tab to display rareo ne EDS nie the default characteristics for this Strobed module J 1734 VHSC24 Produce size 6 a Output size 0 Outpu Polled This screen shows the input output a ean a ee defaults for the four modes These NESE al are ay 1734 VHSC24 Produce size 6 RE Strobe 1734VHSC24 Consume size 2 Quiput help Polled Cyclic Change of state and 1734 VHSC24 Produce size 6 Input help Cyclic 1734VHSC24 Consume szs 2 Outputhelp_ OK Cancel Apply Help Publication 1734 UM003A EN P August 2000 Configuring Your Very High
14. program the module accordingly e Tie Output 0 to Window 0 e Program Window 0 ON Value to 2000 Program Window 0 OFF Value to 5000 ON OFF Operation of Output 0 Output remains energized for 3000 additional counts Output turns ON at count value of 2000 Output turns OFF at count value of 5000 If the OFF value is greater than the ON value the output turns ON at 2000 and OFF at 5000 If the ON value is greater than the OFF value the output turns OFF at 2000 and ON at 5000 About the Very High Speed Counter Modules 1 13 Effect of ON OFF Value on Output Operation Effect of ON OFF Value on Output Operation Output remains Energized Output remains Deenergized for 3000 additional counts for 3000 additional counts Output turns ON Output turns OFF Output turns OFF Output turns ON at count of 2000 at count of 5000 at count of 2000 at count of 5000 TurnOff Value gt Turn On Value TurnOn Value gt Turn Off Value Chapter Summary In this chapter you learned about the kinds of very high speed counter modules and what modes they operate in Read chapter 2 to install your counter module Publication 1734 UMO003A EN P August 2000 1 14 About the Very High Speed Counter Modules Publication 1734 UMO003A EN P August 2000 General Installing the Mounting Base Wiring Base Assembly Chapter 2 Installing the Very High Speed Counter Module The 1734 VHSC is a two module set Module 1 houses the 1734 VHSC functio
15. when output is turned off Delay Time OFF to ON ON to OFF 25us load dependent 150us load dependent Publication 1734 UM003A EN P August 2000 A 2 Specifications Publication 1734 UM003A EN P August 2000 General Specifications Module Location 1734 TB TBS TB3 TB3S wiring base assembly Keyswitch Position 2 Pointbus Current 180mA maximum Power Dissipation 1 9W maximum rated load Thermal Dissipation 6 5 BTU hr maximum rated load Isolation Voltage minimum Prequalified for 1250V ac rms between Module 1 System side PointBus Chassis ground A B Z inputs 00 01 and user power supply Module 2 System side Chassis ground Vaux User power supply common External de Power does not represent power required to supply outputs No additional external power required to power module Field Power Bus 24V de nominal range 10 28 8V dc Inches Millimeters Dimensions 2 21H x 0 47W x 2 97L 56 0H x 12 0W x 75 5L Environmental Conditions Operational Temperature Storage Temperature Relative Humidity Shock Operating Non operating Vibration 20 to 55 C 4 to 131 F 40 to 85 C 40 to 185 F 5 to 95 noncondensing 30g peak acceleration 11 1 ms pulse width 50g peak acceleration 11 1 ms pulse width Tested 5g 10 500H7z per IEC 68 2 6 Conductors Wire Size Category 14 AWG 2 5mm 22 AWG 0 25mm_2
16. 0 01 1 0 11 00 Each time the stored accumulated count words are updated C 1 0 is incremented This feature assumes the host s sample rate including network delay and program scan is as fast or faster than the frequency of the event which updates C 1 0 Zero frequency Detected ZD This bit is operational when frequency configurations are programmed configurations period rate 5 continuous rate 6 rate measurement 7 In period rate 5 and continuous rate 6 configurations counts are acquired during the ON state of the Z input At very low frequencies the counter saturates indicating a zero frequency detect The time it takes to determine a zero frequency in these two configurations can be as long as 6 7 seconds 16 777 216 counts x 1 5MHz x 2 half cycles of Z In rate measurement 7 configuration pulses on the A input are counted over a sample interval specified by the time base The time it takes to determine a zero frequency in this configuration will be determined by the sample interval ex time base 0 300 second 300 milliseconds to determine ZF Output Data Very High Speed Counter Module Input and Output Data 3 5 Counter Control Word 1 VR Value Reset of stored accumulated count The transition of this bit from 0 to 1 clears the stored accumulated count word CP Counter Preset The transition of this bit from 0 to 1 sets the counter to the value specified by the Preset words Outputs
17. 00 will produce a count sequence of 998 999 0 1 2 while incrementing or 2 1 0 999 998 while decrementing Rollover is a 32 bit number with a useable range of 1 lt value lt 0x01000000 16 777 216 In PWM 3 configuration this value should be zero in count 0 x1 encoder 1 x2 encoder 2 and x4 encoder 4 configurations it should be specified to some non zero value and in period rate 5 continuous rate 6 and rate measurement 7 configurations is a don t care Preset Configuration Word 11 This long word sets the preset value the counter will be loaded with when a Counter Preset CP command is issued Preset is a 32 bit number with a range of 0 lt value lt OxOOFFFFFF 16 777 215 Counter ON and OFF Windows Configuration Words 12 to 19 These long words program the four compare window s ON and OFF values The first compare window for each counter is utilized in PWM 3 configuration and when PWM is programmed for a channel the associated compare window should remain at 0 The range of each entry is 0 lt value lt OxOOFFFFFF 16 777 215 When a tie is connected to a compare window that window must be specified i e ON value OFF value 0 These Windows are always interpreted as counts regardless of the configuration setting and may be computed as follows for frequency modes 5 6 amp 7 Period Rate 5 and Continuous Rate counts scalar x 2 5E6 desired_frequency Rate Measu
18. 101 0x65 Get Present Channel Data 4 Status 2 102 0x66 Get Stored Channel Data 4 Status 2 103 0x67 Get Present Channel Data 4 Stored Channel Data 4 Status 2 104 0x68 Get Programming Error Code 2 105 0x69 Set Get Counter Control 1 Output Control 1 106 0x6a Set Get PWM Value 2 107 0x6b Set Get PWM Value 2 Counter Control 1 Output Control 1 Table continued on next page Publication 1734 UM003A EN P August 2000 3 12 Very High Speed Counter Module Input and Output Data Publication 1734 UMO003A EN P August 2000 108 Ox6c Set Get Counter Configuration Filter Selection Decimal Position Active Output Assembly Time Base or PWM Period Gate Interval Scalar Output 0 Ties Output 1 Ties Rollover Value Preset Value N Value 1 FF Value 1 N Value 2 N Value 3 FF Value 3 0 0 0 OFF Value 2 0 0 0 N Value 4 OFF Value 4 PWM Safe State Value N e gt gt gt A A A A AJ AJ S Counter Control SSV Output Control SSV Configuration Overview Chapter 4 Configuring Your Very High Speed Counter Module This chapter describes how to configure your Very High Speed Counter modules with RSNetworx For more information about See page Configuration Overview 4 1 Adding the Adapter to Your Network 4 1 Adding 1 0 Modules to Your
19. Allen Bradley Very High Speed Counter Module Cat No 1734 VHSC5 and VHSC24 User Manual l f i if F ik I I a 4 i e j 3 n PP h a pE i eer is ba i 4 rer r Kit i 4 Afu Par L r a 4 4 3 T 3 5 rs bi f 7 r Ei f Rockwell Automation l 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
20. Gate Reset Pulse 2 5Hz 1M 5Hz 500k 10Hz 250k 20Hz 125k 50Hz 50k 100Hz 25k 200Hz 12 5k 500Hz 5k 1kHz 2 5k 2 Hz 1 25k 5kHz 500 10kHz 250 20kHz 125 50kHz 50 100kHz 25 Scaling the input frequency through the use of a scalar can lessen the decrease in accuracy A scalar value of 1 will only return an accurate input frequency if incoming input pulses have a 50 duty cycle Operation of Scalar In the Period Rate and Continuous Rate modes the scalar lets the incoming pulse train at the Z Gate Reset pin be divided by a user defined number There is one scalar value for each counter Acceptable values for the scalar are 1 2 4 8 16 32 64 and 128 The default value for each scalar is 1 Note that a 0 scalar is equivalent toa 1 The product of the Sample Period times the scalar should be less than 6 71 seconds in order to avoid a zero frequency detect indication 5 MHz sample time 200ns 16 777 216 counts x 200ns x 2 half cycles of Z 6 71 seconds About the Very High Speed Counter Modules 1 7 Continuous Rate Mode The Continuous Rate Mode will return an incoming frequency and a total accumulated count to PointBus by gating an internal 5MHz internal clock with an external signal Similar to the Period Rate mode except outputs in this mode are updated continuously This mode determines the frequency and total number of input pulses by counting the number of internal 5MHz clock pulses over
21. Hz clock pulses over a user specified number of input signal pulses At the end of the specified number of pulses the module returns the frequency 0 1MHz When the frequency is updated both outputs are checked against their associated presets Example of Period Rate Mode A Not Used gt Input A B Not Used Input B Z 7 Input Z Encoder Pulse Generator CAERE Scalar 5 MHz Clk 1734 VHSC Z Input Pulse 5 MHz Internal Sampling Clock 1 10 20 Frequency amp Outputs Updated Here HUUU UU Accumulated Count Assumes symmetrical pulse 50 duty cycle so Period Sample Time On X 2 On amp Off Frequency 1 Period If Count 20 Scalar 1 and Clock Period 1 5 MHz Frequency 1 20 1 X 1 5MHz X2 125 kHz Publication 1734 UM003A EN P August 2000 1 6 About the Very High Speed Counter Modules Publication 1734 UMO003A EN P August 2000 As the frequency of the incoming pulse train at the Z Gate Reset terminal increases the number of sampled pulses from the 5MHz clock decreases Since accuracy is related to the number of pulses received over the sample period the accuracy will decrease with increasing frequencies at the Gate Reset terminal Refer to the following Scaling table Relationship Between Sampled Pulses and Input Frequency Input Frequency at Z Gate Sample Pulses for 1 2 Cycle Reset Terminal of Z
22. Mode count internal clocks during the On period return a frequency Outputs updated only at the end of the period e Continuous Rate Mode count internal clocks during the On period return a frequency Outputs are updated continuously during the period e Rate Measurement Mode read pulses during the sample period return a frequency e PWM Mode pulse width modulation generate a pulse width modulated signal The operation of the counter and encoder modes is nearly identical The difference between the two modes is in the type of feedback 1 phase vs 2 phase for the count direction up or down In encoder mode a transition is expected on B for counting to proceed in a direction whereas in counter mode the B input may be left at a static level All operating modes are selected by writing appropriate configuration data to the module Counter Mode The counter mode reads incoming pulses and returns a binary number 0 16 777 215max to the PointBus The counter mode only accepts single phase inputs The module determines the Phase B input state and counts up or down accordingly Channel A input is used as the counting pulse while channel B is used to determine the direction About the Very High Speed Counter Modules 1 3 B High Count Down B Low or floating not connected Count Up The Channel B input may be tied high or low for unidirectional counting or toggled for bidirectional counting Exa
23. NET DNI Device Net E 1761 NET DNI Series B De 1770 KFD R 232 Interface IE 1784 PCDS Scanner f 1784 PCID DeviceNet Inter 4 1784 PCIDS DeviceNet Sc 1788 CN2DN Linking Devic J 1794 ADN DeviceNet Flex Modular DSA E fH DeviceNet to Sooo gt al IMPORTANT The scanner must always exist on the DeviceNet network at Node 00 Adding 1 0 Modules to Your Network After you add the communication device you must add the POINT I O modules connected to the scanner on the PointBus 1 Add modules as shown below DeviceNet RSNetWorx for DeviceNet AmE aS W 3 3 Saye File Edit View Network Device Tools Help Hardware 2 M44737 1734 VHSC24 2 1734 VHSC5 A J 1734 IK A EO DeviceNet Counter Module Counter Module B Counter Module B Category 1 Click here to expand the list of Specialty modules 2 Double click on the catalog number to choose the module You can also click and drag the module name onto the network j EMG Vendor H Rockwell Automation Allen Bradley je Am M 4 MN Graph Spreadsheet Master Sle Online Not Browsing Z The out of the box node setting for 1734 modules is 63 You can change the setting by using the node commissioning tool The node commissioning tool is available either online or offline Publication 1734 UM003A EN P August 2000 Configuring Your Very High Speed Counter Module
24. Rollover Y af N N N N Software Reset Y Y Y Y y y Store Count Y Y N N N N Z Gate Reset 4 modes Scale Input Count at N N Y Y N N Z Gate Reset Z Gate Reset Invert Bit Y Y y y N N Enable Force Outputs Ni Y Y Y Y Y Assign Outputs Y Y Y Y Y Y Operate Outputs Y y Y Y Y Y Based On Count Count Count Count Count PWM Value Sample Period N N N N Y Y Operating Mode Features The Z Gate Reset Terminal will operate in one of four modes when the Store Count feature is in use The four figures below detail the operation in each mode Store Count Mode 1 Store Continue In mode 1 the rising edge of a pulse input on the Z Gate Reset terminal will cause the current counter value to be read and stored in the Read Data file The counter will continue counting The stored count will be available in the Stored Accumulated Count word The stored count information will remain until it is overwritten with new data Store Continue Read Store Count and Continue Counting Publication 1734 UM003A EN P August 2000 About the Very High Speed Counter Modules 1 11 Store Count Mode 2 Store Wait Resume In mode 2 the rising edge of a pulse input on the Z Gate Reset terminal will read and store the current counter value in the Stored Accumulated Count word and inhibit counting while the Z Gate Reset terminal is high Counting resumes on the falling edge of the pulse at the Z Gate Reset terminal The stored co
25. Speed Counter Module 4 7 1734 VHSC247A Counter Module Click on the EDS File tab to display the statistics of the EDS file used to configure this Click on View File to view the actual EDS file shown at the left DescText PointIO 1734 VHSC24 A CreateDate 04 06 2000 CreateTime 07 41 42 ModDate 06 09 2000 ModTime 14 17 25 Revision 1 1 Device VendCode 1 VYendName Allen Bradley Company Inc ProdType 109 ProdTypeStr Specialty 1 0 You can view the actual ProdCode 14 7 gt i MajRev 1 EDS file or edit the file Broaineme y 1734 VHSC24 A Counter Module Catalog 1734 VHSC24 A Parans Paraml 0 6 20 OF 24 01 30 01 Link Path Size Link Path Ox0000 Descriptor 8 1 Data Type Data Size Counter Configuration Publication 1734 UM003A EN P August 2000 4 8 Configuring Your Very High Speed Counter Module Publication 1734 UMO003A EN P August 2000 Chapter 5 In This Chapter Using Instantiated Instances Accessing Instantiated Instances In this chapter you will learn how to access imbedded Instantiated Instances assemblies in the software The Very High Speed Counter Module uses several words to communicate real time input and output data as well as non real time module information i e description revision etc and configuration These words have been preprogrammed into Instantiated Instances Click on the module to
26. Then lift the mounting base straight up to remove Wiring the 24V dc Very High Speed Counter Module Module Sta us Module Status etwork Status Network Status Status of Inpu Status of Inpu Status of Inpu Status of Outpu S atus of Outpu Installing the Very High Speed Counter Module 2 5 Input A Input A Chassis z hassis j RA Aii Ground M Ground Input B ore Input Bret RET 0 oye RET 1 Ar lalla Input Z Input Zret Vaux Vaux Outo Q Out Vaux Vaux e Ae 42016 Module 1 Module 2 0 1 0 A A h h Be 2 3 B Bret RET RET 0 1 4 5 4 5 Z Zret Vaux Vaux 6 7 6 7 Out Out Vaux Vaux 0 1 Module 1 Terminations Module 2 Terminations 0 A 0 Chassis ground 1 Aret 1 Chassis ground 2 B 2 Out 1 RET 3 Bret 3 Out 0 RET 4 Z 4 Vaux 5 Zret 5 Vaux 6 Out 0 6 Vaux 7 Out 1 7 Vaux Publication 1734 UM003A EN P August 2000 2 6 Installing the Very High Speed Counter Module Chapter Summary In this chapter you learned how to install your module and mounting base assembly You also learned how to wire your module Publication 1734 UMO003A EN P August 2000 Chapter 3 Very High Speed Counter Module Input and Output Data
27. and Z Zreturn nput Voltage 5V de nput Current 19 1mA 5V de 25 7mA 6V de nput OFF State Current lt 0 250mA max nput OFF State Voltage lt 1 25V de nput ON State Current gt 5mA nput ON State Voltage gt 2 6V de Maximum ON State Voltage 6V nput Filter Selections Off 10s 100s 1 0ms 10 0ms Maximum Input Frequency 1 0MHz counter and encoder X1 configurations 500kHz encoder X2 configuration no filter 250kHz encoder X4 configuration no filter Output Specifications Number of Outputs 1 isolated group of 2 capable of 0 54 24V de Output Control Outputs can be tied to any of 4 compare windows Output Supply Voltage Range 10 28 8V dc OFF State Leakage Current lt 0 5mA ON State Voltage Drop lt 0 3V dc 0 5A ON State Current 0 5A maximum Short Circuit Current 6A Outputs are short circuit protected and either cycle until the fault is corrected or latch off depending upon programming Short circuit detected when output is turned on Open Wire Detection Open wire detected when output is turned off Delay Time OFF to ON ON to OFF 25us load dependent 150us load dependent Publication 1734 UM003A EN P August 2000 A 4 Specifications Publication 1734 UM003A EN P August 2000 General Specifications Module Location 1734 TB TBS TB3 TB3S wiring base assembly Keyswitch Position 2 Pointbus Cu
28. are adjusted according to the window compare values CR Counter Reset The transition of this bit from 0 to 1 clears the counter Outputs are adjusted according to the window com pare values Output Control Word 2 Diagnostic speed DS When this bit is set 1 the short circuit and open wire diagnostics will be filtered 50ms to prevent nuisance trips caused by noisy environments When the bit is reset 0 diagnostics responds to a fault condition in less than 8ms Bits 7 and 3 report output 1 and 0 respectively Electronic fuse Select ES When this bit is set 1 outputs will be disabled upon the detection of a fault short circuit or open wire and the output fault status indicator FS will be latched Recovery from a faulted state is achieved by sending ES 0 and OE 1 for the afflicted output When ES equals zero a faulted output will continue to operate as instructed until the fault is removed In either case FS is asserted to indicate a fault Bits 6 and 2 report output 1 and 0 respectively Output Enable OE When this bit is set 1 outputs are permitted to turn on from either a force on FO a compare match or as directed by the PWM settings When OE equals zero the module turns the associated output OFF Bits 5 amp 1 represent outputs 1 amp 0 respectively Force Output FO When this bit is set to 1 outputs are turned on if OE is 1 When FO equals zero outputs may then be controlled by a compare match o
29. ase will snap into place 4 To remove the mounting base from the DIN rail remove any installed module and any module immediately to the right and use a small bladed screwdriver to rotate the DIN rail locking screw to a vertical position This releases the locking mechanism Then lift straight up to remove the mounting base 5 Repeat this procedure for the next mounting base assembly The module can be installed before or after base installation Make sure that the mounting base is correctly keyed before installing the module into the mounting base In addition make sure the mounting base locking screw is positioned horizontal referenced to the base Installing the Very High Speed Counter Module 2 3 1 Using a bladed screwdriver rotate the keyswitch on the mounting base clockwise till the number required for the type of module being installed aligns with the notch in the base Turn the keyswitch to align 1734 VHSC24 Position 2 the number with the notch 1734 VHSCS5 Position 2 Notch position 3 shown 2 Make certain the DIN rail locking screw is in the horizontal position You cannot insert the module if the locking mechanism is unlocked Make sure the DIN rail locking screw is in the horizontal position 3 Insert the module straight down into the mounting base and press to secure The module will lock into place Publication 1734 UM003A EN P August 2000 2 4 Installing the Very High Spe
30. cation Phone ReturateMarketing Communications Allen Bradley 1 Allen Bradley Drive Mayfield Hts OH 44124 6118Phone 440 646 3176 FAX 440 646 4320 Publication ICCG 5 21 August 1995 PN 955107 82 Other Comments PLEASE FOLD HERE BUSINESS REPLY MAIL FIRST CLASS MAIL PERMIT NO 18235 CLEVELAND OH POSTAGE WILL BE PAID BY THE ADDRESSEE AB Allen Bradley Eueernicle ROCKWELL SOFTWARE DODGE Rockwell Automation 1 ALLEN BRADLEY DR MAYFIELD HEIGHTS OH 44124 9705 NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES PLEASE REMOVE Reach us now at www rockwellautomation com Wherever you need us Rockwell Automation brings together leading brands in industrial automation including Allen Bradley controls Reliance Electric power transmission products Dodge mechanical power transmission components and Rockwell Software Rockwell Automation s unique flexible approach to helping customers achieve a competitive advantage is supported by thousands of authorized partners distributors and system integrators around the world Americas Headquarters 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 European Headquarters SA NV avenue Herrmann Debroux 46 1160 Brussels Belgium Tel 32 2 663 06 00 Fax 32 2 663 06 40 Asia Pacific Headquarters 27 F Citicorp Centre 18 Whitfield Road Causeway Bay Hong Kong Te
31. cator A two bit counter C1 amp CO is updated every time an event occurs indicating that new data is available in the Stored Accumulated Count words Events are defined as Any active gate transition in any of the Store Count Counter or Encoder modes The end of the gate sample period in either the Period Rate Continuous Rate or PWM modes The end of the programmed sample period in the Rate Measurement mode To use these bits reliably acquisition of data from the Counter Module must occur faster than the events which cause C1 CO to increment When C1 CO is updated a Change Of State COS message can be sent Default Configuration The module s default configuration on startup will be e Counter Mode e 50Hz filter on A B and Z e No time base Active Output Assembly 105 Rollover OxOOFFFFFF e Preset 0 No scalar Output 0 untied e Output 1 untied e Window comparators 0 e Counter Control Safe State 0 e Output Control Safe State 0 To modify the default settings to those required for your application refer to chapter 3 Publication 1734 UM003A EN P August 2000 1 10 About the Very High Speed Counter Modules Operating Mode Features The following table summarizes which features are active in each mode Operating Feature Counter Encoder Period Continuous Rate PWM Up Down X1 X2 amp X4 Rate Rate Measurement Preset Y Y N N N N
32. cators 6 1 input status indicator 6 2 input voltage range 1 1 input word present channel data 3 2 installation module 2 2 installation wiring base assembly 2 1 installation module 2 2 installation removable terminal block 2 4 K keyswitch position 2 3 modes of operation 1 2 module installation 2 2 module status indicator 6 1 module channel error bits 3 3 mounting base removal 2 4 mounting base assembly 2 1 network status indicator 6 2 new data indicator 1 9 node commissioning tool 4 2 node setting out of box 4 2 0 operating mode features 1 10 operation continuous rate mode 1 7 operation counter mode 1 2 operation encoder mode 1 3 operation pulse width modulation mode 1 8 operation rate measurement mode 1 8 operation scalar 1 6 output control 1 12 output data control word 3 5 output status indicator 6 2 output ties 3 9 outputs 1 2 P parameter setting 4 4 period rate mode operation 1 5 period rate mode 1 2 Publication 1734 UM003A EN P August 2000 2 Index positioning the keyswitch 2 3 present channel data 3 2 preset configuration 3 10 pulse width modulation mode 1 2 pulse width modulation mode operation 1 8 pulse width modulation output word 3 6 PWM mode 1 2 PWM timebase selection 3 3 rate measurement mode 1 2 rate measurement mode operation 1 3 rollover configuration 3 10 RTB installation and removal 2 4 S safe state configuration 3 11 scalar 3 9 scala
33. cessor Functional Overview The Counter Module accepts feedback from encoders either single ended or differential pulse generators mechanical limit switches frequencies up to 1MHz A filter is available with four settings e 50Hz e 500Hz e 5kHz e 50kHz The filter can be turned off to achieve the fastest counting rate The input voltage range is 5Vdc VHSC5 or 15 24Vdc VHSC24 The module returns the count or frequency in the form of a 24 bit binary number 0 16 777 215 expressed in a 32 bit long word Each counter has a user selectable preset and rollover value associated with it Publication 1734 UM003A EN P August 2000 1 2 About the Very High Speed Counter Modules Operating Modes Publication 1734 UMO003A EN P August 2000 The 1734 VHSC has 2 outputs that access customer power from the PointBus to facilitate various output device s voltage requirements The outputs are rated to source 0 5A at 10 to 28 8V dc The output may be tied to an input This lets you cascade counters of multiple 1734 VHSC modules The counter has 4 user selectable On Off values i e windows associated with it Either output may be tied to any or all of the window signals The very high speed counter modules operate in the following modes e Counter Mode read incoming single phase pulses return a binary count e Encoder Mode read incoming 2 phase quadrature pulses return a binary count Period Rate
34. e Publication 1734 UMO003A EN P August 2000 the European Union and EEA regions It has been designed and tested to meet the following directives EMC Directive This product is tested to meet the Council Directive 89 336 EC Electromagnetic Compatibility EMC by applying the following standards in whole or in part documented in a technical construction file e EN 50081 2 EMC Generic Emission Standard Part 2 Industrial Environment e EN 50082 2 EMC Generic Immunity Standard Part 2 Industrial Environment This product is intended for use in an industrial environment Low Voltage Directive This product is tested to meet Council Directive 73 23 EEC Low Voltage by applying the safety requirements of EN 61131 2 Programmable Controllers Part 2 Equipment Requirements and Tests For specific information required by EN 61131 2 see the appropriate sections in this publication as well as Allen Bradley publication 1770 4 1 Industrial Automation Wiring and Grounding Guidelines Open style devices must be provided with environmental and safety protection by proper mounting in enclosures designed for specific application conditions See NEMA Standards publication 250 and IEC publication 529 as applicable for explanations of the degrees of protection provided by different types of enclosures Definitions Preface 3 The following define the intended operation of the Very High Speed counter module Lead Breakage
35. e continue Mode 2 store wait resume CS ee OO 1 1 Mode 3 store reset wait start 0 Mode 4 store reset start Reserved Reserved Reserved 0 Z input 0 not inverted 1 Z input 1 inverted Very High Speed Counter Module Input and Output Data 3 7 Filter Selection Configuration Word 2 This byte sets the A B Z input filters Filter Selection 07 06 05 04 03 02 01 00 0 ZF BF AF FS 0 70 JO 0 J NoFilter 0 0 O 1 50kHz 10s 0us 1 6us 0 10 1 0 5kHz 100us Ous 13 2uUs 0 1 0 0 500Hz 1 0ms Ous 125us 1 0 0 0 50Hz 10ms Oms 1 25ms 0 A input not filtered 1 A input filtered 0 B input not filtered 1 B input filtered 0 Z input not filtered 1 Z input filtered Decimal Position Configuration Word 3 This byte changes the significant digits of the frequency or counter display In the frequency modes period rate 5 continuous rate 6 rate measurement 7 for example a 2 will move the decimal point left 2 places dividing the frequency value by 100 a 1 moves it right multiplying by 10 The firmware checks for placement to be in the range 4 lt value lt 2 A value outside the range will move the decimal point to the zero position and assert the programming error PE bit Moving the decimal point to the left i e negative allows high freq
36. e period At the end of the interval the module returns a value representing the sampled number of pulses and a value indicating the incoming frequency When the count and frequency are updated any associated outputs are checked against their associated presets Frequency is calculated by dividing the accumulated count by the user selected time period and is returned in the read data Allowable time periods are 10ms to 3s in 10ms increments with a default value of 1s Note that a 0 time period is equivalent to the 1s default Example of Rate Measurement Mode A Input A gt Input B Not Used P Input B Z Not Used Input Z Gate Reset Encoder Pulse Generator Time Base 1734 VHSC A Input Pulse Internal Sampling Gate Accumulated Count Frequency Calculated User Selectable Sample Period Outputs Updated Here 10ms to 2s in 10ms increments If Sample Period is 50ms and Count 3 then Frequency 3 50ms 60Hz Pulse Width Modulation PWM Mode The Pulse Width Modulation mode uses the counter to generate a continuous rolling sequence of numbers The real time PWM value written to the module is converted to a window edge so that a variable duty cycle signal can be generated The counter will reset to zero based upon the PWM Period programmed into the module Any output tied to Window 0 will transmit the PWM signal About the Very High Speed Counter Modules 1 9 New Data Indi
37. ears here This field is read only eS a This screen also shows the module s device identity These fields are read only Use this pulldown menu to edit or view the parameters Available choices are Jar parameters fi Status Configuration PointBus 7 Device Specialty 1 0 103 Configuring Your Very High Speed Counter Module 4 5 E 1734 VHSC24 A Counter Module 21 x General Device Para 1 0 Defaults EDS File Click on the Device parameters tab to get to the screen for setting the parameters 1734 VHSC24 4 Counter Module Device Identity Primary Vendor Rockwell Automation Allen Bradley 1 At any point you can click here to finish changing configuration parameters Product 1734 VHSC24 A Counter Module 14 Catalog 1734VHSC24 A Revision fo Cancel only Help IMPORTANT f configuration changes are made in offline mode they do not take effect until the system goes online EDS Editor x This screen appears after clicking on the Device parameters tab If you want the existing parameters uploaded from the module select Upload The following screen will then show the existing parameters set on the module Do you want to upload the configuration from the device updating the 4 software s configuration or download the software s configuration to the device updating the device For more information pres
38. ed Counter Module Installing the Removable Terminal Block Removing a Mounting Base Publication 1734 UMO003A EN P August 2000 A removable terminal block is supplied with your mounting base assembly To remove pull up on the RTB handle This allows the base to be removed and replaced as necessary without removing any of the wiring To reinsert the removable terminal block proceed as follows 1 Insert the RTB end opposite the handle into the base unit This end has a curved section that engages with the mounting base Se Hook the RTB end into the mounting base end gt and rotate until it locks into place Rotate the terminal block into the mounting base until it locks itself in place If an I O module is installed snap the RTB handle into place on the module To remove a mounting base you must remove any installed module and remove the removable terminal block Gf wired 1 2 Unlatch the RTB handle on the I O module Pull on the RTB handle to remove the removable terminal block Press in on the module lock on the top of the module and pull up on the I O module to remove from the base Remove the module to the right of the base you are removing The interlocking portion of the base sits under the adjacent module Use a small bladed screwdriver to rotate the orange DIN rail locking screw on the mounting base to a vertical position This releases the locking mechanism
39. encoder 4 or the frequency configurations period rate 5 continuous rate 6 rate measurement ZD The range of values is 0 lt value lt OxOOFFFFFF 16 777 215 Stored Accumulated Channel Data Input Word 2 This is a 32 bit unsigned long word value representing the stored count of the counter at the time of some specified event In counter configurations configurations count 0 x1 encoder 1 x2 encoder 2 x4 encoder 4 without store modes selected these words are not updated With store modes selected they are the stored value of the counter at the time of the specified event ex rising edge of Z input In PWM 3 configuration it is the counter value at the end of the period specified by the product of the time base x gate interval In period rate 5 and continuous rate 6 configurations it is the total accumulation of unscaled Z pulses i e if scaling is set to 128 after 128 Z pulses the accumulator will increase by 128 counts The maximum frequency that accumulation can follow in these two modes is 200Hz x scalar value ex 200Hz x 128 is 25kHz Finally in Very High Speed Counter Module Input and Output Data 3 3 rate measurement 7 configuration it is the total number of pulses seen at the A input accumulated over each period as specified by the product of the time base x gate interval The range of values occupy the entire 32 bit size from 0 lt value lt OxFFFFFFFF 4 294 967 295 Changing the configu
40. er Module Input and Output Data 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0 Scalar 8 bit value used to divide the Z input by 2 Output Ties 0 0 0 0 0 13 12 T1 T0 Output Ties 1 0 0 0 0 13 T2 T1 T0 Rollover Value 32 bit value at which the counter is commanded to rollover Preset Value 32 bit value the counter is to be set to when CP is asserted On Value 1 32 bit value that sets the compare window Off Value 1 32 bit value that sets the compare window On Value 2 32 bit value that sets the compare window Off Value 2 32 bit value that sets the compare window On Value 3 32 bit value that sets the compare window Off Value 3 32 bit value that sets the compare window On Value 4 32 bit value that sets the compare window Off Value 4 32 bit value that sets the compare window PWM Safe State Value 16 bit safe state value for the PWM signal Counter Control SS Value 0 0 0 0 0 VR CP CR Output Control SS Value DS ES OE FO DS ES OE FO Detailed Description of Data Table Information Publication 1734 UMO003A EN P August 2000 Present Channel Data Input Word 1 This is a 32 bit unsigned long word value representing the current count of the 24 bit counter configurations count 0 x1 encoder 1 x2 encoder 2 PWM 3 x4
41. gramming Error Code 2 105 0x69 Set Get Counter Control 1 Output Control 1 106 0x6a Set Get PWM Value 2 107 0x6b Set Get PWM Value 2 Counter Control 1 Output Control 1 Publication 1734 UM003A EN P August 2000 5 4 Accessing Instantiated Instances Publication 1734 UMO003A EN P August 2000 108 Ox6c Set Get Counter Configuration Filter Selection Decimal Position Active Output Assembly Time Base or PWM Period Gate Interval Scalar Output 0 Ties Output 1 Ties Rollover Value Preset Value N Value 1 FF Value 1 N Value 2 N Value 3 FF Value 3 0 0 0 OFF Value 2 0 0 0 N Value 4 OFF Value 4 PWM Safe State Value ee ee Counter Control SSV Output Control SSV Chapter 6 Troubleshooting with the Indicators Using the Indicators for Each 1734 VHSC very high speed counter module has 7 indicators on H the frontplate Use these indicators for troubleshooting Troubleshooting rontplate Us indicators for troubleshooting Module Module Status Indication Module Status Network Network Status Status Status of Input A Status of Input B Status of Input Z Status of Output 0 Status of Output 1 EA Probable Cause Off No power applied to device Green Device operating normally Flashing Green Device need
42. ion is always known even if the system power is turned off Example of Multiplying Encoder Mode X1 X2 and X4 Gate Reset Quadrature Encoder 1734 VHSC Forward Rotation Reverse Rotation Aime OL B Input X1 Count X2 Count Outputs Updated X4 Count Continuously X1 Multiplying Encoder Mode Quadrature input signals are used to count on the leading up direction OR trailing down direction edge of A for a bidirectional count and channel B is used to determine the direction B leads A Count Down B follows A Count Up X2 Multiplying Encoder Mode Quadrature input signals are used to count on leading AND trailing edges of A for a bidirectional count and channel B is used to determine the direction B leads A Count Down B follows A Count Up About the Very High Speed Counter Modules 1 5 X4 Multiplying Encoder Mode Quadrature input signals are used to count on leading AND trailing edges of A AND B for a bidirectional count and channel B is used to determine the direction B leads A Count Down B follows A Count Up Period Rate Mode The Period Rate Mode will return an incoming frequency and a total accumulated count to the PointBus by gating an internal 5MHz internal clock with an external signal This mode determines the frequency and total number of input pulses by counting the number of internal 5M
43. l 852 2887 4788 Fax 852 2508 1846 Publication 1734 UMO003A EN P August 2000 Allen Bradley SEEMED DOQGE aan Automation PN 957293 30 2000 Rockwell International Corporation Printed in the U S A
44. mmissioning tool Messages Address Device Type PES 4 Node Commissioning 01 Workstation 40 1734VHSC24 A Counter Module J 42 1734VHSC5 A Counter Module 1734 N A Counter Module 1734 1K A Counter Module Change the node num Apply The screen will then identify the new setting Click on Close to continue iea Select a device by using the browsing service Current 1734 VHSC24 A Counter Module Settings Address 40 i y Data Rate 500KB New 1734 VHSC24 A Counter Module Settings J The network data rate should not be changed fe 7 network The new network data rate will not take erect until power is recycled Addess 40 Datarate 500kb M ays the ber and m 4 Node Commissioning Select a device by using the browsing service Browse Current 1734 VHSC24 A Counter Module Settings p Address 41 Data Rate 500 KB AN p New 1734 VHSC24 4 Counter Module Settings The network data rate should not be changed on an active network The new network data rate will not take effect until power is recycled Addess 41 Datarate 500kb gt Messages Node 41 commissioned Publication 1734 UM003A EN P August 2000 4 4 Configuring Your Very High Speed Counter Module Setting the Counter s Parameters 1 Right click on the module After adding the module to the network you must configure the modules for use IMPORTANT This
45. mple of Counter Mode A Input Input A B Direction Input B Z Store Count Input Z Gate Reset Single Phase Pulse Generator 1734 VHSC Count Up Count Down A Input B Input Outputs Count Updated Continuously s Encoder Modes The encoder mode reads incoming pulses and returns a binary number 0 16 777 215 to the PointBus The encoder mode only accepts 2 phase quadrature inputs The module senses the relationship between the 2 phases and counts up or down accordingly There are two basic encoder types absolute and incremental A single output incremental encoder is called a tachometer encoder A dual channel incremental encoder with one channel leading the other by 90 is called a quadrature encoder A system using a quadrature encoder may include an optional zero pulse or index serving as a reference mark for system reset The principal disadvantage of a system using incremental encoders is that a power interruption causes the loss of position reference so a system must be reinitialized or returned to a known zero position Publication 1734 UM003A EN P August 2000 1 4 About the Very High Speed Counter Modules Publication 1734 UMO003A EN P August 2000 Absolute encoders typically have higher speed requirements 200 KHz typical for motion control applications An absolute encoder has a unique code associated with each position so the exact posit
46. nality while module 2 provides screw terminals necessary to access chassis ground Chas Gnd and common C Module 2 also connects terminal 4 to 5 and terminal 6 to 7 for ease of wiring power to the input device Module 2 is not necessary for VHSC functionality but eases customer wiring Module 2 does not use a node address and it doesn t consume power from the PointBus To reduce loop area place module 2 adjacent either side to module 1 The wiring base assembly 1734 TB or TBS consists of a mounting base cat no 1734 MB and a removable terminal block cat no 1734 RTB or RTBS You can install the assembly or just the mounting base To install the mounting base wiring base assembly on the DIN rail proceed as follows 1 Position the mounting base wiring base assembly vertically above the installed units adapter power supply or existing module 2 Slide the mounting base down allowing the interlocking side pieces to engage the adjacent module or adapter Publication 1734 UM003A EN P August 2000 2 2 Installing the Very High Speed Counter Module Installing an 1 0 Module Publication 1734 UMO003A EN P August 2000 Slide in Writable Label Module Locking Mechanism Insertable 1 0 Module Mechanical Keying orange RTB Removing Handle DIN Rail Locking Screw orange Z Interlocking Side Pieces Mounting Base 3 Press firmly to seat the mounting base on the DIN rail The mounting b
47. nic Data Sheet files We assume you know how to do this in this manual If you do not refer to your software user manuals or online help before attempting to use these modules The following table lists related 1734 products and documentation Description Cat No Publication POINT 1 0 Technical Data 1734 Series 1734 2 1 Sink Input Module Installation Instructions 1734 B2 IB4 1734 IN051 Source Output Module Installation Instructions 1734 IV2 IV4 1734 IN052 Analog Input Module Installation Instructions 1734 IE2C 1734 IN053 Analog Output Module Installation Instructions 1734 OE2C 1734 IN054 Relay Output Module Installation Instructions 1734 OW2 1734 IN055 Protected Output Module Installation Instructions 1734 OB2E OB4E 1734 INO56 Publication 1734 UM003A EN P August 2000 Preface 2 Description Cat No Publication DeviceNet Communication Interface Installation Instructions 1734 PDN 1734 IN057A POINT 1 0 24V dc Expansion Power Supply Installation Instructions 1734 EP24DC 1734 IN058A Field Potential Distributor Installation Instructions 1734 FPD 1734 INO59A General Installation Instructions All 1734 1734 5 10 Wiring Base Assembly Installation Instructions 1734 TB TBS 1734 5 11 Wiring Base Assembly Installation Instructions 1734 TB3 TB3S 1734 IN013A European Communities EC If this product has the CE mark it is approved for installation within Directive Complianc
48. o filter was programmed OR Multiple filters were selected EO A reserved configuration mode was programmed Publication 1734 UM003A EN P August 2000 3 4 Very High Speed Counter Module Input and Output Data Publication 1734 UMO003A EN P August 2000 EEPROM Fault status bit EF If a fault is detected with the EEPROM during power up tests this bit is asserted to 1 It indicates that the content of the EEPROM has been corrupted most likely caused by loss of power during an executing write Not Ready status bit NR Whenever power is applied to the module the hardware must be initialized During this time the NR bit will be asserted and the green module status indicator will flash Output Fault Status indicators FS where bit 11 is output 1 and bit 10 is output 0 A 1 indicates the output is either shorted or open Output Status indicators OS where bit 9 is output 1 and bit 8 is output 0 A 1 indicates the output is ON 0 it is OFF Z input Status ZS This bit indicates the present status of the Z input 1 indicates Z is ON 0 indicates Z is OFF This bit is unaffected by Z Invert ZI in the Counter Configuration word B input Status BS This bit indicates the present status of the B input 1 indicates B is ON 0 indicates B is OFF A input Status AS This bit indicates the present status of the A input 1 indicates A is ON 0 indicates A is OFF C 1 0 Stored data count This count cycles through 0
49. or the counter Its resolution is in milliseconds with minimum 10ms intervals G e an interval of 10 milliseconds is a value of 10 1 second is 1000 The maximum value that may be programmed is 3 seconds 3000 The time base must be entered when the PWM 3 and rate measurement 7 configurations are used Gate Interval Configuration Word 6 This byte sets the counter s gate interval using the time base setting as its time unit i e its resolution is determined by the time base The actual gate interval is the product of the time base and the gate interval ex 50ms gate interval may be produced with a time base of 10 and a gate interval of 5 or a time base of 50 and a gate interval of 1 The maximum value of the product of time base x gate interval is 3 seconds The gate interval must be entered when the PWM 3 and rate measurement 7 configurations are used The maximum value is 200 Very High Speed Counter Module Input and Output Data 3 9 Scalar Configuration Word 7 This byte scales the Z signal in the period rate 5 and continuous rate 6 configurations If the filter is applied then the filtered Z is scaled Only one bit of the scalar should be set Selecting a scalar will cause accumulated counts to be adjusted accordingly i e selecting a scalar of 128 will increase the accumulated count by 128 after 128 Z pulses have been received It is highly recommended that anytime Z is scaled divide by 2 4 8 etc the Z inpu
50. r as directed by the PWM settings Bits 4 amp 0 represent outputs 1 amp 0 respectively Publication 1734 UM003A EN P August 2000 3 6 Very High Speed Counter Module Input and Output Data Configuration Data Publication 1734 UMO003A EN P August 2000 Pulse Width Modulation PWM Value Output Word 3 When the module is programmed for a PWM 3 configuration the time base is enabled the counter rollover the 1 ON and 1 OFF value for the respective channel are used Ties can be used to direct the PWM signal to any or both outputs The range of PWM values is 0 lt value lt 9500 decimal i e 0 00 lt value lt 95 00 Entering a value below 0 will result in a PWM of 0 a value greater than 9500 will result in a PWM of 95 00 The actual duty cycle observed at the output will depend on the turn on and turn off times of the MOSFET the energy storage capability of the cable load and the resistance from output to return The following represents the configuration data used by the 1734 VHSC24 module Counter Configuration Configuration Word 1 Use this byte to select the type of counter desired 07 06 05 04 03 02 01 00 ZI MD CF 0 0 Counter 0 1 Encoder X1 Encoder X2 PWM 0 Encoder X4 Period Rate Continuous Rate Counter 0 oO oO OLG cS Ea oO oOo oO ojl CO ojojo Rate Measurement Store Count Disabled 0 1 Mode 1 stor
51. r operation 1 6 scalar selection 3 9 selecting a filter 3 7 selecting counter type 3 6 Publication 1734 UM003A EN P August 2000 selecting the scalar setting 3 9 setting module parameters 4 4 setting rollover counts 3 10 setting safe state values 3 11 setting the compare windows 3 10 setting the counter gate interval 3 8 setting the preset value 3 10 specifications 1734 VHSC5 A 3 specifications for the 1734 VHSC24 A 1 stored accumulated channel data 3 2 V viewing EDS files 4 6 Ww wiring base assembly 2 1 Z Z gate reset terminal modes of operation 1 10 Z gate reset terminal operation 1 10 AB Allen Bradley Ny Publication Problem Report If you find a problem with our documentation please complete and return this form Pub Title Type Very High Speed Counter Module User Manual Cat No 1734 VHSC24 Pub No 1734 UM003A Pub Date August 2000 PartNo 957293 30 1734 VHSC5 Check Problem s Type Describe Problem s Internal Use Only Technical Accuracy eal text illustration Completeness F procedure step illustration F definition O info in manual What information is missing F example F guideline feature accessibility explanation other info not in manual Clarity What is unclear C Sequence What is not in the right order Other Comments Use back for more comments Your Name Lo
52. ration does not clear these words Module Channel Status and Programming Error Codes Input Words 3 and 4 Programming Error bit PE If an incomplete incorrect or conflicting set of configuration parameters are sent to the module the PE bit will be asserted and an error code will be placed in the Programming Error Code word assembly 6816 The module will not enter a normal operational state Bit definitions for the error code are E10 An invalid assembly was chosen for poll consumption 0 105 or 106 are valid E9 The decimal point position is outside of acceptable range E8 Counter 0 window ON amp OFF values are equal and not zero OR Counter 0 window ON or OFF value greater than OxOOFFFFFF E7 A tie has been connected to an unprogrammed window E6 A configuration was selected that requires the scalar and none was programmed OR Multiple scalars were selected E5 The preset is out of range gt OxOOFFFFFF E4 A rollover of zero was programmed though PWM was not selected OR A rollover was programmed and PWM was selected OR Rollover is out of range gt 0x01000000 E3 A configuration requiring time base was selected and no gate interval was set OR Gate interval is out of range gt 200 OR Product of time base and gate interval is greater than 3 seconds E2 A time base was entered that is not a multiple of 10 OR Time base is out of range gt 3000 i e 3 seconds E1 ZF BF AF were selected and n
53. rement counts time_base sec x gate_interval x desired_frequency Communicating Real Time Non real Time Information Very High Speed Counter Module Input and Output Data 3 11 Safe State Values Configuration Words 20 through 22 When either the host transitions to PROGRAM mode or a communication fault G e broken network cable occurs the module copies these safe state words counter control output control and PWM value into its real time working buffer The definitions are identical to those described under Real time Output Data with the following exception entering a PWM Safe State value outside of the range 0 9500 will result in a Hold Last State to be executed The Very High Speed Counter Module uses several words to communicate real time input and output data as well as non real time module information i e description revision etc and configuration Assembly 101 is produced for a polled connection Assembly 102 is produced for a Change Of State COS connection Assemblies 103 104 107 and 108 are by Explicit message only Assemblies 105 and 106 are consumed in a polled connection as directed by parameter 4 Data may be read get or written set using an Explicit Message For example to read the Present Channel Data assembly 10119 6516 can be requested The following table shows the words which can be exchanged Instances Services Field Bytes
54. rk 4 2 Setting the Counter s Parameters 0000 5 4 4 Checking I O Status and Viewing Editing the EDS File 4 6 Ty This Chapt r Teei 5i4 a cd orev hag he a a ace Sealy Rea kas 5 1 Using Instantiated Instances 0 0 0 0 5 1 Assemblies es i ae tee ede eee tue eee ates 5 3 Using the Indicators for Troubleshooting 6 1 Specifications for the Very High Speed Counter Module cat no 1734 VHSC2 4o 6 5 cooley Sout nt ee pagans Bhat sy ROBES VO nd es A 1 Input Derating Curve for 1734 VHSC24 A 3 Specifications for the Very High Speed Counter Module cat no 1734 VHS Ces sce sw a a assy Do aed Sew gine en ca a a aas a DA A 3 General Introducing the Very High Speed Counter Modules Chapter 1 About the Very High Speed Counter Modules In this chapter you will learn about the types of very high speed counters their features and capabilities Module Overview The counter modules install into the Point I O terminal base 1734 TB or TBS and interface with the Point I O DeviceNet Pass through 1734 PDN or the Point I O DeviceNet Adapter 1734 ADN The Counter Module serves as a signal conditioner and function block G e a counter between the customer process signals on the terminal base and the PointBus containing the command information The three main functional blocks are the customer digital I O interface the counter ASIC and the micropro
55. rrent 180mA maximum Power Dissipation 1 5W maximum rated load Thermal Dissipation 5 1 BTU hr maximum rated load Isolation Voltage minimum Prequalified at 1250V ac rms between Module 1 System side Chassis ground A B Z inputs 00 01 and user power supply Module 2 System side Chassis ground Vaux User power supply common External dc Power does not represent power required for outputs No additional external power required to power module Field Power Bus 24V de nominal range 10 28 8V dc Inches Millimeters Dimensions 2 21H x 0 47W x 2 97L 56 0H x 12 0W x 75 5L Environmental Conditions Operational Temperature Storage Temperature Relative Humidity Shock Operating Non operating Vibration 20 to 55 C 4 to 131 F 40 to 85 C 40 to 185 F 5 to 95 noncondensing 30g peak acceleration 11 1 ms pulse width 50g peak acceleration 11 1 ms pulse width Tested 5g 10 500H7z per IEC 68 2 6 Conductors Wire Size Category 14 AWG 2 5mm 22 AWG 0 25mm_2 solid or stranded wire rated at 75 C or higher 3 64 inch 1 2mm insulation maximum 22 Terminal Base Screw Torque 7 pound inches 0 6Nm Field Wiring Terminations Module 1 0 A 1 Aret 2 B 3 Bret 4 Z 5 Zret 6 Output 0 7 Output 1 Module 2 0 Chassis ground 1 Chassis ground 2 Return 0 3 Return 1 4 V 5 V 6 4 V 7 4 V Mass 1 15 02 32 60 grams
56. s F1 Upload Download EY 1734 VHSC24 A Counter Module ae General Device Parameters 0 Defaults EDS File roups Online Upload From Device Restore Default Values Download To Device All Parameter Help __ Stet Monitors f Configuration Parameter Current Value Poi ntB us Sequential uta ddress Do Nothing PA CANNA Broadcast Baud Rate 125 kHz z Broadcast AutoB aud Enable 1 Counter Conhawation g 2 4 B Z Input Filter 120 3 Decimal Position 0 4 Active Dutput Assembly 0 5 Time Base or PWM Period 0 6 Gate Interval 0 7 Scalar 0 8 Output 0 Ties 0 9 Output 1 Ties 0 10 Rollover 16777215 11 Preset 100 _12 Compare talist TON Value 0 xl ca bemm repe 13 Compare Window 1 OFF Yalue 0 14 Compare Window 2 ON Value 0 Status 15 Compare Window 2 OFF Value 0 16 Compare Window 3 ON Value 0 a J 17 Compare Window 3 OFF Value 0 ID Parameter Current Value 18 Compare Window 4 ON Value 0 27 Programming Enor 0 19 Compare Window 4 OFF Value 0 20 PWM Safe State Value 0 21 Counter Control Safe State 0 22 Dutput Control Safe State 0 Autobaud D v Publication 1734 UM003A EN P August 2000 4 6 Configuring Your Very High Speed Counter Module EX 1734 VHSC24 A Counter Module 2 x General Device Parameters 1 0 Defaults EDS File Upload From Device Download To Device Start Monitor Current Value Online To configure your
57. s commissioning due to configuration missing incomplete or incorrect Flashing Red Recoverable fault Red Unrecoverable fault may require device replacement Flashing Red Green Device is in self test Publication 1734 UM003A EN P August 2000 6 2 Troubleshooting with the Indicators Publication 1734 UMO003A EN P August 2000 Indication Probable Cause Network Status Off Device is not on line Device has not completed dup_MAC_id test Device not powered check module status indicator Flashing Green Device is on line but has no connections in the established state Green Device on line and has connections in the established state Flashing Red One or more 1 0 connections in timed out state Red Critical link failure failed communication device Device detected error that prevents it communicating on the network Flashing Communication faulted device the device has detected a Red Green network access error and is in communication faulted state Device has received and accepted an Identify Communication Faulted Request long protocol message Indication Probable Cause Input Status Off Input inactive Yellow Input is active and under control Indication Probable Cause Output Status Off Output inactive Yellow Output is active and under control Flashing Yellow Output is toggling Flashing Red Output is faulted open short or no outp
58. select the Class Instance Editor TTA 5 Module Coui le Counter Module a or Cut 43 63 e Cy el Del M44737 HSCS A 1734 M A dule Counter Modul H 1734VHSCS A Ce EE Vendor a Rockwell Automation AllenBradley LT fil 4v1 W Graph Speadhes y Maser lt om Execute the Class Instance Edtor tool forthe selected device Drine Net Browsing Service Class Instance Attribute Editor x WARNING This editor provides direct access to the i i d device using the native DeviceNet object addressing C lick on Yes when this model Therefore there are no names labels or help screen appears prompts to assist you in identifying retrieving and or modifying any device data You assume full responsibility for understanding the impact of your requested action on the device Do you want to continue Publication 1734 UM003A EN P August 2000 5 2 Accessing Instantiated Instances 1 Select the service code Get Single Attribute 2 Select the Receive Data size and radix Bute Word 2 bytes Double 4 bytes Decimal Hexadecimal Binar Publication 1734 UM003A EN P August 2000 The Class Instance Attribute editor screen will appear 22 Service Class Instance Attribute Editor Node 40 i 3 Enter the class Get Single Attribute FF Send the attibute 1D instance and attribute here 4 Click on Execute to initiate the action For example
59. solid or stranded wire rated at 75 C or higher 3 64 inch 1 2mm insulation maximum 22 Terminal Base Screw Torque 7 pound inches 0 6Nm Field Wiring Terminations Module 1 0 A 1 Aret 2 B 3 Bret 4 Z 5 Zret 6 Output 0 7 Output 1 Module 2 0 Chassis ground 1 Chassis ground 2 Return 0 3 Return 1 4 V 5 V 6 4 V 7 4 V Mass 1 15 02 32 60 grams Agency Certification when product is marked CE marked for all applicable directives C Tick marked for all applicable acts DeviceNet compatible as certified by ODVA Inc 1 Off on delay is time from a valid output on signal to output energization On off delay is time from a valid output off signal to outpu deenergization 2 Use this conductor category information for planning conductor routing as described in publication 1770 4 1 Industrial Automation Wiring and Grounding Guidelines Specifications for the Very High Speed Counter Module cat no 1734 VHSC5 Specifications A 3 Input Derating Curve for 1734 VHSC24 2 A Input Voltage S 2534 Input 20 Voltage Moa 10 L pas es 10 20 30 40 45 55 Module Ambient Still Air Temperature C Note Exceeding the maximum input voltage can cause permanent damage to the input Specifications 1734 VHSC5 Very High Speed Counter Module Input Specifications Number of Inputs 1 1 group of A Areturn B Breturn
60. t should be filtered otherwise noise could cause erroneous frequency readings Scalar Selection o7 06 los o4 03 o2 01 00 scalar o lo fo lo fo lo Jo 1 Z Fiin 0 149Hz o lo fo lo fo lo Jt fo 2 2 Fri 0 298Hz o lo fo lo fo l1 Jo fo 2 4 Fin 0 596Hz o lo fo lo 1 lo Jo 0 2 8 Fmin 1 192Hz o lo fo l1 fo lo Jo fo 2 16 Fmin 2 384Hz o lo 1 lo fo lo Jo fo 2 32 Fmin 4 768Hz o l lo lo fo lo Jo fo 2 64 Fmin 9 537Hz 1 lo fo lo fo Jo fo Jo 7 128 Fmin 19 073Hz 1 Where Fmin indicates the frequency at which the zero frequency detect is asserted due to counter overflow Output 0 1 Ties Configuration Words 8 and 9 The bits in these two bytes connect the specified output to the appropriate compare window There are 4 windows associated with the counter Each output may be connected to any number of windows from 1 to all 4 The bits are defined as follows TO Tie Output to 1 Compare Window also the PWM signal in PWM 3 configuration T1 Tie Output to 2 Compare Window T2 Tie Output to 3 Compare Window T3 Tie Output to 4 Compare Window Publication 1734 UM003A EN P August 2000 3 10 Very High Speed Counter Module Input and Output Data Publication 1734 UMO003A EN P August 2000 Rollover Configuration Word 10 This long word sets the number of counts the counter will accumulate before rolling over For example a value of 10
61. uencies commonly present in rate measurement mode to fit within a single 16 bit word Moving the decimal point to the right i e positive allows low frequencies commonly present in period and continuous rate modes to have resolution displayed to 0 1Hz and 0 01Hz Frequencies should be kept below 3 2kHz for 0 1Hz resolution and below 320Hz for 0 01Hz Scalars of Z 128 Z 64 Z 32 and Z 16 should not be used when positioning is applied 0 is the default setting Publication 1734 UM003A EN P August 2000 3 8 Very High Speed Counter Module Input and Output Data Publication 1734 UMO003A EN P August 2000 In the counter modes counter 0 x1 encoder 1 x2 encoder 2 pwm 3 x4 encoder 4 it attenuates the counter display for example 20 divides count 1 by 20 The value may be in the range 0 lt value lt 255 The result of requesting a number other than 1 performs the function COUNT 1 ATTENUATION This is useful for scaling a large counter value to a smaller 16 bit value or a percentage 1 is the default setting and zero reverts to 1 to prevent a divide by zero Active Output Assembly Configuration Word 4 This byte permits selection of either assembly 105 0x69 Counter Output Control or 106 Ox6A PWM Value for poll consumption Entering a zero will cause the default assembly 105 to be selected Time Base Pulse Width Modulation PWM Period Configuration Word 5 This word sets the fundamental time base f
62. unt information will remain until it is overwritten with new data Store Wait Resume Stop Counting Store Count Resume Counting NI IZ Store Count Mode 3 Store Reset Wait Start In mode 3 the rising edge of a pulse input on the Z Gate Reset terminal will stop counting read and store the current counter value in the Stored Accumulated Count word and reset the counter to zero The counter does not count while the input pulse on the Z Gate Reset terminal is high Counting resumes from zero on the falling edge of the pulse at the Gate Reset terminal The stored count information will remain until it is overwritten with new data Store Reset Wait Start Counter has stopped Counting Stop Count Store Start Counting and Reset to zero from zero Publication 1734 UM003A EN P August 2000 1 12 About the Very High Speed Counter Modules Publication 1734 UMO003A EN P August 2000 Store Count Mode 4 Store Reset Start In mode 4 the rising edge of a pulse input on the Z Gate Reset terminal will store the current counter value in the Stored Accumulated Count word and reset the counter to zero The counter will continue counting while the Z Gate Reset terminal is high The stored count information will remain until it is overwritten with new data Store Reset Start Start Counting Store Count Ry and Reset to zero Continue Counting Nf Z Output Control To connect an output to a compare window the user could
63. ut power Flashing Output is toggling and faulted possibly open Red Yellow Appendix A Specifications for the Very High Speed Counter Module cat no 1734 VHSC24 Specifications Specifications 1734 VHSC24 Very High Speed Counter Module Input Specifications Number of Inputs 1 1 group of A Areturn B Breturn and Z Zreturn nput Voltage 15 24V de nput Current 6 1mA 15V de 10 2mA 24V de nput OFF State Current lt 0 250mA max nput OFF State Voltage lt 1 8V de nput ON State Current gt 5mA nput ON State Voltage gt 12 5V de Maximum ON State Voltage Refer to derating curve below nput Filter Selections Off 10s 100s 1 0ms 10 0ms Maximum Input Frequency 1 0MHz counter and encoder X1 configurations 500kHz encoder X2 configuration no filter 250kHz encoder X4 configuration no filter Output Specifications Number of Outputs 1 isolated group of 2 capable of 0 54 24V de Output Control Outputs can be tied to any of 4 compare windows Output Supply Voltage Range 10 28 8V dc OFF State Leakage Current lt 0 5mA ON State Voltage Drop lt 0 3V dc 0 5A ON State Current 0 5A maximum Short Circuit Current 6A Outputs are short circuit protected and either cycle until the fault is corrected or latch off depending upon programming Short circuit detected when output is turned on Open Wire Detection Open wire detected

Very High Speed Counter Module

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