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MVI94-MCM User Manual

1. 5 4 Modbus Protocol Specification The following pages give additional reference information regarding the Modbus protocol commands supported by the MVI94 MCM 5 4 1 Commands Supported by the Module The format of each command in the list depends on the MODBUS Function Code being executed The following table lists the functions supported by the module Function Definition Supported in Supported in Code Master Slave 1 Read Coil Status Xx Xx 2 Read Input Status Xx Xx 3 Read Holding Registers X X 4 Read Input Registers X X 5 Set Single Coil Xx Xx 6 Single Register Write X X 8 Diagnostics X 15 Multiple Coil Write X X 16 Multiple Register Write X X 17 Report Slave ID X 22 Mask Write 4X X 23 Read Write X Each command list record has the same general format The first part of the record contains the information relating to the communication module and the second part contains information required to interface to the MODBUS slave device ProSoft Technology Inc Page 83 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 5 4 2 Read Coil Status Function Code 01 Query This function allows the user to obtain the ON OFF status of logic coils used to control discrete outputs from the addressed Slave only Broadcast mode is not supported with this function code In addition to the Slave address and fun
2. to display the main menu MODULE MENU Display Menu A Data Analyzer B Block Transfer Statistics C Hodule Configuration D Database View R Receive Module Configuration S Module Configuration V Version Information Warm Boot Module Esc Exit Program 2 Press S Send Module Configuration The message Press Y key to confirm configuration send is displayed at the bottom of the screen MODULE MENU Display Menu A Data Analyzer B Block Transfer Statistics C HModule Configuration D Database View R Receive Module Configuration Send Module Configuration V Version Information H Harm Boot Module Esc Exit Program Press Y key to confirm configuration send Display Mono A Data Analyze B Bloc ck Transfer Statistics C Module Configuration D Database View R Receive Module Configuration S Send Module Configuration V Version Information W Harm Boot Module Esc Exit Program Press Y key to confirm configuration send Sending configuration file JRANGFERRTNG CONFIGURATION FILES FROM ProSoft MODULE TO PC The Ynoden peetocel is used to send the file from the module Select the RECEIVE menu option and destination directory Building configuration file image from module Ready to Send ProSoft Technology Inc Page 39 of 109 March 29 2011 Configuration MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 4 From the Transfer
3. Stopping the Data Analyzer Press S to stop the data analyzer Use this option to freeze the display so the data can be analyzed To restart the analyzer press B Important When in analyzer mode program execution will slow down Only use this tool during a troubleshooting session Before disconnecting from the Config Debug port please press S to stop the data analyzer and then press M to return to the main menu This action will allow the module to resume its normal high speed operating mode Data Analyzer Tips From the main menu press A for the Data Analyzer You should see the following text appear on the screen Data Analyzer Mode Selected After the Data Analyzer mode has been selected press to view the Data Analyzer menu You will see the following menu DATA ANALYZER VIEW MENU Display Menu 1 Select Port 1 2 Select Port 2 v mSec Ticks 6 5 mSec Ticks 7 10 mSec Ticks 8 50 mSec Ticks 9 100 mSec Ticks B No mSec Ticks H Hex Format A ASCIT Format B Start S Stop H Main Menu Port 1 Format HEX Tick 10 From this menu you can select the Port the format and the ticks that you can display the data in For most applications HEX is the best format to view the data and this does include ASCII based messages because some characters will not display on HyperTerminal and by capturing the data in HEX we can figure out what the corresponding ASCII characters are supposed to be The Tick va
4. 02 Illegal Data Address The data address received in the query is not an allowable address for the Slave More specifically the combination of reference number and transfer length is invalid For a controller with 100 registers a request with offset 96 and length 4 would succeed a request with offset 96 and length 5 will generate exception 02 03 Illegal Data Value A value contained in the query data field is not an allowable value for Slave This indicates a fault in the structure of the remainder of a complex request such as that the implied length is incorrect It specifically does not mean that a data item submitted for storage in a register has a value outside the expectation of the application program because the Modbus protocol is unaware of the significance of any particular value of any particular register 04 Slave Device Failure An unrecoverable error occurred while the Slave was attempting to perform the requested action 05 Acknowledge Specialized use in conjunction with programming commands The Slave has accepted the request and is processing it but a long duration of time will be required to do so This response is returned to prevent a timeout error from occurring in the Master The Master can next issue a poll program complete message to determine if processing is completed 06 Slave Device Busy Specialized use in conjunction with programming commands The Slave is engaged in
5. B you should see something like the following 031 001 041 001 051 001 061 001 071 001 081 001 091 FB1 B 1_TT__TT_ lt R gt lt 01 gt lt 02 gt lt B0 gt lt 0B0 gt lt 00 gt lt BA gt lt F8 gt lt 0D gt lt R gt _TT__TT1__T1T_ 0111 021 021 001100 i ee fe lt B81 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt BA gt lt C5 gt lt CD gt lt R gt _TT__TT_ 011 031 141100 11001 011 001_TT_ 02110011031 001 041 001 051 001 061 001 071 001 081 001 09 lt 01 gt lt 01 gt lt 00 gt lt 00 gt lt 00 gt lt A0 gt lt 30 gt lt 72 gt lt R gt _TT__T1T_ 011 011 141100 0011031 001 041 001 051 001 061 001 071 001 081 001 091 00 lt B81 gt lt 04 gt lt 080 gt lt 00 gt lt 00 gt lt BA gt lt 70 gt lt B8D gt lt R gt _TT__TT_ 011 041 141100 021 001 031 001 041 001 051 001 061 001 071 001 081 00110 lt B1 gt lt 02 gt lt 00 gt lt 0B0 gt lt 00 gt lt BA gt lt F8 gt lt B8D gt lt R gt _TT__TT_ TT_ 011 0211 _TT_ lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt 0M gt lt C05 gt lt CD gt lt R gt _TT__TT_ 0111 TO01_TT_ A et E ec ee lren eet Ol O Co AN D Vv OG Oo _TT_ lt R gt lt 081 gt lt 01 gt lt 00 gt lt 00 gt lt 00 gt lt A9 gt lt 30 gt lt 72 gt lt R gt _TT__TT 10011021_T1T_ 001103110011041 001105110011061 10011071 0 i TT__TT_ lt R gt lt 01 gt lt 04 gt lt 00 gt lt 00 gt lt 00 gt lt 0A gt lt 70 gt lt 0D gt lt R gt _TT__TT
6. Data Analyzer 48 53 Data Analyzer Tips 55 Data Transfer 75 Database View Menu 49 57 DB9 to Mini DIN Adaptor Cable 09 71 Device MODBUS Address 37 Diagnostics and Troubleshooting 45 Disclaimer of all Other Warranties 105 Disclaimer Regarding High Risk Activities 104 Displaying the Current Page of Registers Again 58 Displaying Timing Marks in the Data Analyzer 53 E Enable Code 35 Enron Daniel Float Configuration 33 Error and Status Data Table 60 Error Codes 61 Error Status Data 60 Event Blocks 1000 to 1255 78 F FLEX I O Interfaces 66 Floating Point Data Handling Modbus Master 25 Floating Point Data Handling Modbus Slave 32 Force Multiple Coils Function Code 15 90 Force Single Coil Function Code 05 88 Function Code 37 Functional Overview 72 Functional Specifications 67 G General Specifications 65 General Specifications Modbus Master Slave 66 H Hardware Installation 11 How to Contact Us 2 Important Installation Instructions 3 Installing the Module onto the Base 15 Installing the Serial Adapter Cables 16 Intellectual Property Indemnity 105 Internal Address 36 K Keystrokes 46 L LED Definition 63 Limitation of Remedies 106 LIMITED WARRANTY 101 103 Main Menu 48 Master Command Error List Menu 51 Master Command List 82 Master Command List Menu 52 Modbus Error Codes 62 Modbus Exception
7. Inc Page 101 of 109 March 29 2011 Support Service 4 Warranty MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 6 1 2 Returning Units Under Warranty A Technical Support Engineer must approve the return of Product under ProSoft Technology s Warranty a Areplacement module will be shipped and invoiced A purchase order will be required b Credit for a product under warranty will be issued upon receipt of authorized product by ProSoft Technology at designated location referenced on the Return Material Authorization i If a defect is found and is determined to be customer generated or if the defect is otherwise not covered by ProSoft Technology s warranty there will be no credit given Customer will be contacted and can request module be returned at their expense ii If defect is customer generated and is repairable customer can authorize ProSoft Technology to repair the unit by providing a purchase order for 30 of the current list price plus freight charges duties and taxes as applicable 6 1 3 Returning Units Out of Warranty a Customer sends unit in for evaluation to location specified by ProSoft Technology freight prepaid b If no defect is found Customer will be charged the equivalent of 100 USD plus freight charges duties and taxes as applicable A new purchase order will be required c If unit is repaired charge to Customer will be 30 of current list price US
8. MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual 4 2 Using the Configuration Debug Port To connect to the module s Configuration Debug port 1 Connect your computer to the module s port using a null modem cable 2 Start the communication program on your computer and configure the communication parameters with the following settings Baud Rate 57 600 Parity None Data Bits 8 Stop Bits 1 Software Handshaking None 3 Open the connection When you are connected press the key on your keyboard If the system is set up properly you will see a menu with the module name followed by a list of letters and the commands associated with them If there is no response from the module follow these steps 1 Verify that the null modem cable is connected properly between your computer s serial port and the module A regular serial cable will not work 2 Verify that RSLinx is not controlling the COM port Refer to Disabling the RSLinx Driver for the Com Port on the PC 3 Verify that your communication software is using the correct settings for baud rate parity and handshaking 4 On computers with more than one serial port verify that your communication program is connected to the same port that is connected to the module If you are still not able to establish a connection you can contact ProSoft Technology Technical Support for further assis
9. Timeout 0 to 65535 This parameter specifies the Guard Band time between packets in multi drop slave mode A value of 0 uses the default time A value of 1 to 65535 sets the time in milliseconds ProSoft Technology Inc March 29 2011 Page 97 of 109 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Module Information a de Device Information MODBUS COMMAND ENTRY ORM Columns 1 f 2 poro di gt 7 E e tomar Internal Poll Ele ee ee Device Modbus Ente Mbs Address Time Code Aen Page 98 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Support Service amp Warranty Serial Communications Modbus Communication Module User Manual 6 Support Service amp Warranty In This Chapter Contacting Technical Support eeeeeeeeeeteeeeeeeeeeeeeeeteaeeseaeeseaeeeeaees 99 Return Material Authorization RMA Policies and Conditions 101 LIMITED WARRANTY isto scitisececdesvenceseischecdevsagececccnsaccupereeestessanetaiss 103 Contacting Technical Support ProSoft Technology Inc ProSoft is committed to providing the most efficient and effective support possible Before calling please gather the following information to assist in expediting this process 1 Product Version Number 2 System architecture 3 Network details If the issue is hardware related we will al
10. to add three commands to the command queue use block 2003 WwW 9956 This block transfers function code 6 single register data to the processor in pass through mode W 9957 This block transfers function code 6 single floating point register data to the processor in pass through mode WwW 9958 This block transfers function code 5 single bit data to the processor in pass through mode W 9960 This block transfers function code 22 single masked write data to the processor in pass through mode R 9998 Warm boot the module When the module receives this block it will reset all program values using the configuration data R 9999 Cold boot the module When the module receives this block it will perform a hardware reset ProSoft Technology Inc March 29 2011 Page 77 of 109 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Data is transferred between the processor and the module using the block identification codes of 1 to 666 and 9956 to 9958 and 9960 The other block codes control the module from the processors ladder logic They are implemented when the ladder logic needs to control the module In order to use one of the blocks the ladder logic inserts the data and code in the output image of the module The data should be set before the code is placed in the block This operation should be performed after the receipt of a new write blo
11. Base oooooconicccionccconccconcccnancnconnnnnanncnannnnonn ca nanncnnnncnnns 13 2 3 Setting JUMPEMS cece ceeeececceeeececeseeeeeaeeseaeeeeaeeeeaeeesaeeesaeeseaeesseeeseacesseeeteaeesseeees 14 2 4 Installing the Module onto the Base oooconooccccnnoccccconcccccnonanccnnonnn cnn crac cnn nnnnn cra nnnnnnn 15 2 5 Installing the Serial Adapter Cables ooooncccinncccinnccconccnoncncnnrccnonrcnnnrnnnarnn cnn canon 16 2 6 Wiring the Power Connections cccccceeeeeeeeeeeeseeeeeeeeeeeaeeseaeeeeaeeseneeseneeeseeeseaees 17 3 Configuration 19 3 1 MOUE eee dl lonas 20 3 2 Rola E E EAE E A E AE EEE E 21 3 3 Modbus Master aa E E E ie deel eaten 23 3 4 IMOCBUS SIAVE e a ah e da ida 24 3 5 Floating Point Data Handling Modbus Master ooooococcnnncccconnccccccnoncccncnnnancnnnnnnnnn 25 3 5 1 Floating Point Data Handling Modbus Master oooooccccnnnoccconoccccccnoncccncnnnancnnonnnnnnn 25 3 5 2 Floating Point Data Handling Modbus Slave oooconcconicicinncccnoccconcccnnnnnnnnrncnancncnnos 32 3 6 Commands letrada ida 35 3 6 1 A A O O ch tee Nile ovens 35 3 6 2 Inte ral AGO OSS coria decane ph aeeaeed steveel meget ihacaatet 36 3 6 3 Polk Interval TIM Giria ae vaeeccevvnscctee vas dice ar ci 36 3 6 4 COUNT eis ite A eee ee ev eng 36 3 6 5 Swap GOCE iii ae ten eee eles a aie a a avian terete 36 3 6 6 NOG i eins ese eet eel tek eins eet teens Pere tai 37 3 6 7 Function COS civic AA Aces 37 3 6 8 Device MODBUS Address ococoncccccoc
12. Blocks Parsed 19 Total Number of Event Blocks Received 20 Total Number of Command Blocks Received 21 Total Number of Block Transfer Errors Counter Values are initialized to O at power up Page 60 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual 4 4 2 Command Error List Each command in the command list has a reserved word value for a status error code This error data list can be read using the Configuration Debug Port Additionally the data can be placed in the virtual Modbus database of the module The configuration parameter Command Error Pointer defines the register address in the virtual Modbus database where the data will be placed The first word in the register location defined contains the status error code for the first command in the port s command list Each successive word in the command error list is associated with the next command in the list Therefore the size of the data area is dependent upon the number of commands defined Refer to the following Error Codes section to interpret the status error codes present in the data area 4 4 3 Slave Status List The slave status list views the communication status of each slave device on a master port Slaves attached to the master port can have one of the following states 0 The slave is inactive and not defined in the command list
13. Configuration Serial port PRT1 Mini DIN RS 232 Hardware handshaking Application serial Port PRT2 Mini DIN RS 232 422 485 jumper selectable 500V optical isolation from backplane Dimensions with Module installed in Base 3 7H x 3 7W x 2 7D inches 94H x 94W x 69D mm 5 1 3 General Specifications Modbus Master Slave Communication Parameters Modbus Modes Floating Point Data Modbus Function Codes Supported Baud rate 110 to 115K baud Stop bits 1 or 2 Data size 7 or 8 bits Parity None Even Odd RTS timing delays 0 to 65535 milliseconds RTU mode binary with CRC 16 ASCII mode with LRC error checking Floating point data movement supported including configurable support for Enron Daniel and other implementations fee Read Coil Status 15 Force Write Multiple Coils Read Input Status 16 Preset Write Multiple Read Holding Registers Holding Registers Read Input Registers 17 Report Slave ID Slave Only Force Write Single Coil 22 Mask Write Holding Preset Write Single Register Slave Only Holding Register 23 Read Write Holding Diagnostics Slave Only Registers Slave Only Responds to Subfunction 00 Page 66 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual 5 1 4 Functional Specifications Modbus Master A port configured as a virtual Modbus Master acti
14. Factor 47005 32 bit REAL Voltage Line to Line 47006 32 bit REAL Voltage Line to Neutral 47007 32 bit REAL Current This type of device uses one Modbus address per floating point register To read these values from the Slave device configure the following command within the module MCM CONFIG Portl MasterCmd 0 Posat MCM CONFIG Porti MasterCmd 0 Enable 1 MCM CONFIG Portl MasterCmd 0 Int ddress 1000 MCM CONFIG Portl MasterCmd 0 Polllnt MCM CONFIG Portl MasterEmd 0 Count MCM CONFIG Portl MasterCmd 0 Swap MCM CONFIG Portl MasterCmd 0 Node 1 MCM CONFIG Portl MasterCmd 0 Func 3 MCM CONFIG Portl MasterCmd 0 Dev4ddress 0 Notice that the count is now set to a value of 7 Because the Slave device utilizes only 7 Modbus addresses a count of 7 will cause the Slave to respond with 14 registers 28 bytes of information Important This command will still occupy 14 register within the MCM DATA READDATA array You must not use addresses 1000 to 1013 in the IntAddress field for any other Modbus Master commands The COP statement for this type of data is the same as shown in Read Multiple Floating Point Registers page 28 aa MCM DATA ReadDatal0 MCM_Float_Data 0 Page 30 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual Write to Enron Daniel Floats To issue a Write
15. Products ProSoft warrants to the original purchaser that the Product that is the subject of the sale will 1 conform to and perform in accordance with published specifications prepared approved and issued by ProSoft and 2 will be free from defects in material or workmanship provided these warranties only cover Product that is sold as new This Warranty expires three 3 years from the date of shipment for Product purchased on or after January 1st 2008 or one 1 year from the date of shipment for Product purchased before January 1st 2008 the Warranty Period If the Customer discovers within the Warranty Period a failure of the Product to conform to specifications or a defect in material or workmanship of the Product the Customer must promptly notify ProSoft by fax email or telephone In no event may that notification be received by ProSoft later than 39 months from date of original shipment Within a reasonable time after notification ProSoft will correct any failure of the Product to conform to specifications or any defect in material or workmanship of the Product with either new or remanufactured replacement parts ProSoft reserves the right and at its sole discretion may replace unrepairable units with new or remanufactured equipment All replacement units will be covered under warranty for the 3 year period commencing from the date of original equipment purchase not the date of shipment of the replacement unit Such repair inc
16. RxD Signal 5 Signal Common Common RS 232 Null Modem Connection No Hardware Handshaking This type of connection can be used to connect the module to a computer or field device communication port RS 232 Application Port Cable No Handshaking DB 9 Male RS 232 Device RxD 2 Ht TxD RxD com com Note For most null modem connections where hardware handshaking is not required the Use CTS Line parameter should be set to N and no jumper will be required between Pins 7 RTS and 8 CTS on the connector If the port is configured with the Use CTS Line set to Y then a jumper is required between the RTS and the CTS lines on the port connection RS 232 Application Port Cable No Handshaking DB 9 Male RS 232 Device TxD s H RxD RxD 2 TxD RTS 7 RTS CTS jumper must be installed if CTS line CTS ql monitoring enabled Signal 5 Signal Common Common DTR ProSoft Technology Inc Page 69 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 5 2 2 RS 232 Configuration Debug Port This port is physically an eight pin Mini DIN8F connection A Mini DIN8M to DB9M adapter cable is included with the module This port permits a PC based terminal emulation program to view configuration and status data in the module and to control the module Here are the cable pinouts for RS 232 communication on this port RS 232 Config Debug Port Cable DB 9
17. Start Register and write BT Write Start Register locations in the virtual Modbus database and the amount of data transferred BT Read Register Count and BT Write Register Count Each read and write operation transfers a six word data area The read operation from the processor to the module contains a two word header that defines the block identification code of the read data and the block identification code of the next write block requested These identification codes are in the range of 0 to 666 A value of zero indicates that the block contains no data and should be ignored The first valid block identification code is one and refers to the first block of six words to be read or written ProSoft Technology Inc March 29 2011 Page 75 of 109 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module The module and the processor constantly monitor input and output images How does either one know when a new block of data is available Recognizing a change in the header information of the image word 0 solves the problem For example when the module recognizes a different value in the first word of the output image new data is available from the processor When the processor recognizes a new value in the first word of the input image new data is available from the module This technique requires the storage of the previously processed data block identification code The following
18. can help determine if there are communication problems between the processor and the module Tip To determine the number of blocks transferred each second mark the numbers displayed at a specific time Then some seconds later activate the command again Subtract the previous numbers from the current numbers and divide by the quantity of seconds passed between the two readings Viewing Modbus Configuration Press C to view the module name and the configuration of the internal Modbus database Opening the Database View Menu Press D to open the Database View menu Use this menu command to view the current contents of the module s database For more information about this submenu see Database View Menu page 57 Opening the_Client Command Error List Menu Press E to open the Client Command Error List This list consists of multiple pages of command list error status data Press to view a list of commands available on this menu Opening the Command List Menu Press L to open the Command List menu Use this command to view the configured command list for the module Viewing the Slave Status List Press O to view the 256 slave status values associated with the port The slave status values are defined as follows 0 slave is not used 1 slave being actively polled 2 slave suspended and 3 slave disabled ProSoft Technology Inc Page 49 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM s Flex
19. database to write over the backplane This parameter computes the number of blocks to transfer from the module to the backplane The number of blocks must be gt 2 for proper backplane data transfer BT Write Start 0 to 3995 This parameter specifies the starting register in the internal Register Modbus database to fill with data read over the backplane BT Write Register 12 to This parameter specifies the number registers in the internal Count 3996 Modbus database to consider from the read operations over the backplane This parameter computes the number of blocks to transfer from the backplane to the module The number of blocks must be gt 2 for proper backplane data transfer Backplane Fail 0 to This parameter specifies the number of consecutive Count 65535 backplane transfer failures before communications is disabled If the parameter is set to a value of 0 communications is not disabled Type 0 1 3 4 This parameter specifies if the port will emulate a Modbus master device 0 a Modbus slave device without pass through 1 a Modbus slave device with pass through and data swapping 3 or a Modbus slave device with pass through 4 ProSoft Technology Inc Page 95 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Section Item Value Range Description Float Flag YorN This flag specifies if the floating point data access functionality
20. for the master port 1 The slave is actively being polled or controlled by the master port and communication is successful 2 The master port has failed to communicate with the slave device Communication with the slave is suspended for a user defined period based on the scanning of the command list Slaves are defined to the system when the module initializes the master command list Each slave defined will be set to a state of 1 in this initial step If the master port fails to communicate with a slave device retry count expired on a command the master will set the state of the slave to a value of 2 in the status table This suspends communication with the slave device for a user specified scan count Error Delay Count value in the configuration Each time a command in the list is scanned that has the address of a suspended slave the delay counter value will be decremented When the value reaches zero the slave state will be set to one This will enable polling of the slave The slave status list can only be viewed using the module s configuration debug port The O option on the main menu displays the status of all 256 slave units 4 4 4 Error Codes The module error codes are listed in this section Error codes are separated into Modbus error codes and module error codes ProSoft Technology Inc Page 61 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM s Flex I O Platform User Manual Serial Communication
21. illustration shows the normal sequence of events for data transfer NORMAL DATA TRANSFER OPERATION FLEX PROCESSOR MVIS4 MCM MODULE VIRTUAL DATA OUTPUT INPUT MODBUS TABLE IMAGE IMAGE DATABASE Program initializes the Last RD 6 block to O and the WR Bik and RD Bik values to 1 lt _ Write Start Register Ladder logic recognizes a new E WR BIK 1D 1 in Input Image 1 It places the data in the image 1 Program copies data in the Data Table RD DATA to input image and The ladder logic next writes the read data requested to the output image and copies the RD Bik ID to word 0 of the input image The module s program recognizes the value in word 0 ofthe output image has changed It sets the Last RD 1 places the data in the Modbus DB 1 IWR DATA Read Start Register RD DATA The module now sets anew value forthe WR BIk parameter and fills in the data in the input image It sets the next RD Bik and the WR Bik values in the input image The cycle is now complete and at step 3 e o The steps outlined in the diagram above are discussed below 1 During program initialization the write and read block identification codes are set to one The last block read variable is set to zero 2 The program copies the first six word block of the virtual Modbus database starting at the user defined
22. is to be implemented If the float flag is set to Y Modbus functions 3 6 and 16 will interpret floating point values for registers as specified by the two following parameters Float Start 0 to This parameter defines the first register of floating point data 32767 All requests with register values greater than or equal to this value will be considered floating point data requests This parameter is only used if the Float Flag is enabled For example if a value of 7000 is entered all requests for registers 7000 and above will be considered as floating point data Float Offset 0 to 3995 This parameter defines the start register for floating point data in the internal database This parameter is only used if the Float Flag is enabled For example if the Float Offset value is set to 3000 and the float start parameter is set to 7000 data requests for register 7000 will use the internal Modbus register 3000 Protocol Oori This parameter specifies the Modbus protocol to be used on the port Valid Protocols are 0 Modbus RTU and 1 Modbus ASCII Baud Rate 110 to This is the baud rate to be used on the port Enter the baud 115K rate as a value For example to select 19K baud enter 19200 Valid entry for this field include 110 150 300 600 1200 2400 4800 9600 19200 28800 38400 57600 and 115 Parity 0 to 4 This is the Parity code to be used for the port The coded values are as follows 0
23. logic Due to their length Modbus write commands 15 16 and 23 will have their data written to the database in the same manner as no pass through mode The module must complete the block transfer before it can accept another pass through write command The first word contains the block identification number indicating the type of command received The second contains the length of the data in words being written across the backplane The third word contains the destination address from the write command The fourth contains the data If floating point is enabled and the data comes from a floating point register the fourth word will contain the first word of the data and the fifth word will contain the second word of data Page 80 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual Pass Through Block 9956 9957 9958 or 9960 from Module to Processor Word Description 0 This word contains the block 9956 to 9958 representing the type of pass through data being transferred 1 This word contains the number of data registers being transferred 2 This word contains the destination address for the data 3 This word contains the register data For 9960 AND Mask 4 This word contains the second register data when floating point data is being transferred For 9960 OR Mask Reserved 6 Reserved Warm Boot Block 9
24. of RTU characters that is the number is the same whether RTU or ASCII is used Because the Slave interface device is serviced at the end of a controller s scan data will reflect coil status at the end of the scan Some Slaves will limit the quantity of coils provided each scan thus for large coil quantities multiple PC transactions must be made using coil status from sequential scans Adr Func Byte Data Coil Data Coil Data Coil Data Coil Data Coil Error Count Status 20to Status28to Status36to Status44to Status52to Check 27 35 43 51 56 Field 11 01 05 CD 6B B2 OE 1B CRC The status of coils 20 to 27 is shown as CD HEX 1100 1101 Binary Reading left to right this shows that coils 27 26 23 22 and 20 are all on The other coil data bytes are decoded similarly Due to the quantity of coil statuses requested the last data field which is shown 1B HEX 0001 1011 Binary contains the status of only 5 coils 52 to 56 instead of 8 coils The 3 left most bits are provided as zeros to fill the 8 bit format 5 4 3 Read Input Status Function Code 02 Query This function allows the user to obtain the ON OFF status of discrete inputs in the addressed Slave PC Broadcast mode is not supported with this function code In addition to the Slave address and function fields the message requires that the information field contain the initial input address to be read Starting Address and the number of locations that will be inte
25. page of data Goes forward one page of data Goes up one level to main menu Redisplaying the Current Page Press S to display the current page of data Viewing the Previous 50 Commands Press to view the previous 50 commands Viewing the Previous Page of Commands Press P to display the previous page of commands Viewing the Next 50 Commands Press to view the next 50 commands from the Master command list Viewing the Next Page of Commands Press N to display the next page of commands Returning to the Main Menu Press M to return to the Main menu Page 52 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual 4 3 4 Data Analyzer The data analyzer mode allows you to view all bytes of data transferred on each port Both the transmitted and received data bytes are displayed Use of this feature is limited without a thorough understanding of the protocol Note The Port selection commands on the Data Analyzer menu differs very slightly in different modules but the functionality is basically the same Use the illustration above as a general guide only Refer to the actual data analyzer menu on your module for the specific port commands to use Important When in analyzer mode program execution will slow down Only use this tool during a troubleshooting session Before discon
26. rr 57 4 4 Error Status Dalai ined a ees nD ee ace 60 4 4 1 Error and Status Data Table oooncccinicccincccinaccccnnccnoncnnonncnnann cnn cn nnncnranr cnn rca 60 4 4 2 Command Error Listis sac cnn A 61 4 4 3 Slave Status Litio Ai 61 4 4 4 Error Codes ici A A ee 61 4 5 LED DST cia ia A awed eed 63 4 5 1 PR Thai NAAA e 63 4 5 2 Mia A A 63 4 5 3 DA te eat Minar ain aaa na ie E aa 63 4 5 4 SAA AAA dee oi 63 4 5 5 PR Tirada 63 5 Reference 65 5 1 Product Specifications nnr ada aa rre nana 65 5 1 1 General Specifications cccccceccesesceceneeeeeeeeceeeeeeeeeeseaeeseaeeeseaeeseaeeeseaeeseeesseaeesaas 65 5 1 2 FEEX I O Interfaces cc a eit at ee ate hte eens 66 5 1 3 General Specifications Modbus Master Slave cccccccessceesseseeesssteteesssneees 66 5 1 4 Functional Specifications cccccceecceceeeeeeeneeceeeeeseaeeeeaeeeeeaeeseaeecsneeseaeesseaeesseeesaees 67 5 2 Cable Connections a it A ia eels 68 5 2 1 RS 232 Application Port S aeaee aaae aeae AE an arc nc nc 68 5 2 2 RS 232 Configuration Debug POlt oocconcicinncccnnccccnccnconnncnnrnaconnc nono nnnnn cnn ca ranccnnnn 70 5 2 3 RS 485 Application Port S ooooooonncconnccinncconncocnnncccconcnconn cnn nrn cnn cn nnnc cnc 70 5 2 4 A O E 71 5 2 5 DB9 to Mini DIN Adaptor Cable 09 oooooocinccccnnccccnoccconccccnnnccnnnccnancnnanncnrnnnnconnnnnnnno 71 5 3 Functional OVGNnvlIGW vide vise dere 72 5 3 1 About the MODBUS Protocol cccccceceeeeeeeeeeeeeeeaee
27. that caused the exception The following table shows an example of a Master request and server exception response Request Response Field Name Hex Field Name Hex Function 01 Function 81 Starting Address Hi 04 Exception Code 02 Starting Address Lo Al Quantity of Outputs Hi 00 Quantity of Outputs Lo 01 In this example the Master addresses a request to server device The function code 01 is for a Read Output Status operation It requests the status of the output at address 1245 04A1 hex Note that only that one output is to be read as specified by the number of outputs field 0001 If the output address is non existent in the server device the server will return the exception response with the exception code shown 02 This specifies an illegal data address for the Slave ProSoft Technology Inc Page 93 of 109 March 29 2011 Reference User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module Modbus Exception Codes Code Name Meaning 01 Illegal Function The function code received in the query is not an allowable action for the Slave This may be because the function code is only applicable to newer devices and was not implemented in the unit selected It could also indicate that the Slave is in the wrong state to process a request of this type for example because it is unconfigured and is being asked to return register values
28. to be associated with the command Functions 5 and 6 ignore this field as they only apply to a single data point For functions 1 2 and 15 this parameter sets the number of digital points inputs or coils to be associated with the command For functions 3 4 and 16 this parameter sets the number of registers to be associated with the command 3 6 5 Swap Code This parameter defines if the data received from the Modbus slave is to be ordered differently than received from the slave device This parameter is helpful when dealing with floating point or other multi register values as there is no standard method of storage of these data types in slave devices This parameter can be set to order the register data received in an order useful by other applications The following table defines the values and their associated operations Swap Code Description 0 None No Change is made in the byte ordering 1234 1234 1 Words The words are swapped 1234 3412 2 Words 8 Bytes The words are swapped then the bytes in each word are swapped 1234 4321 3 Bytes The bytes in each word are swapped 1234 2143 Page 36 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual 3 6 6 Node This parameter specifies the Modbus slave node address on the network to be considered Values of 1 to 255 are permitted Most Modbus devices only accep
29. to transfer a configuration file from your PC to the module 1 Connect your PC to the Configuration Debug port of the module using a terminal program such as HyperTerminal Press to display the main menu MODULE MENU Display Menu A Data Analyzer B Block Transfer Statistics C Module Configuration D Database View R Receive Module Configuration Send Module Configuration V Version Information H Harm Boot Module Esc Exit Program ProSoft Technology Inc Page 41 of 109 March 29 2011 Configuration User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module 2 Press R Receive Module Configuration The message Press Y key to confirm configuration receive is displayed at the bottom of the screen MODULE MENU Display Menu A Data Analyzer B Block Transfer Statistics C Hodule Configuration D Database View R Receive Module Configuration Send Module Configuration V Version Information WWare Boot Module Esc Exit Program Press Y key to confirm configuration receive 3 Press Y The screen now indicates that the PC is ready to send Ee Edt Yew CA Taner to Ose 03057 MODULE MENU Display Menu A Data Analyzer B Block Transfer Statistics C Module Configuration D Database View R Receive Module Configuration Module Configuration V Version Information WWare Boot Module Esc Exit Progran Press Y key to confirm configur
30. will resume Data in the virtual Modbus database is accessible through a configured Modbus slave port Remote Modbus master devices can monitor and control data in this database through this port The module provides a Configuration Debug port for use with an external computer executing a terminal emulation program The terminal emulation program provided with the module permits uploading and downloading of the configuration information required by the module Additionally the Configuration Debug port provides a view into the virtual Modbus database communication statistics and the configuration Page 72 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual 5 3 1 About the MODBUS Protocol MODBUS is a widely used protocol originally developed by Modicon in 1978 Since that time the protocol has been adopted as a standard throughout the automation industry The original MODBUS specification uses a serial connection to communicate commands and data between Master and Slave devices on a network Later enhancements to the protocol allow communication over other types of networks MODBUS is a Master Slave protocol The Master establishes a connection to the remote Slave When the connection is established the Master sends the MODBUS commands to the Slave The MVI94 MCM module can work as a Master and as a Slave The MVI94 MCM module
31. 3 of 109 March 29 2011 Configuration User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module With the above configuration this would be the addressing for the module Module Address Modbus Address Tag Address 100 47001 MCM DATA WriteData 1 00 102 47002 MCM DATA WriteData 1 02 104 47003 MCM DATA WriteData 1 04 110 47006 MCM DATA WriteData 110 120 47011 MCM DATA WriteData 120 200 47051 MCM DATA WriteData 200 300 47101 MCM DATA WriteData 300 500 47201 MCM DATA WriteData 500 Page 34 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual 3 6 Commands The COMMANDS section of the configuration file sets the Modbus master port command list This list polls Modbus slave devices attached to the Modbus master port The module supports numerous commands This permits the module to interface with a wide variety of Modbus protocol devices The command list is formatted differently than the other sections of the configuration file Commands are present in a block between the labels START and END These labels inform the program where the list resides The module s program will parse all commands after the START label until it reaches the END label or until the command count entered for the port is reached The function codes used for each command ar
32. 7_ Analyzing Data for the second application port Press 2 to display I O data for the second application port in the Data Analyzer Displaying Timing Marks in the Data Analyzer You can display timing marks for a variety of intervals in the data analyzer screen These timing marks can help you determine communication timing characteristics Key Interval 5 1 milliseconds ticks 6 5 milliseconds ticks 7 10 milliseconds ticks 8 50 milliseconds ticks 9 100 milliseconds ticks 0 Turn off timing marks Removing Timing Marks in the Data Analyzer Press 0 to turn off timing marks in the Data Analyzer screen ProSoft Technology Inc Page 53 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module Viewing Data in Hexadecimal Format Press H from the Database View menu to display the data on the current page in hexadecimal format Viewing Data in ASCII Text Format Press A from the Database View menu to display the data on the current page in ASCII format This is useful for regions of the database that contain ASCII data Starting the Data Analyzer Press B to start the data analyzer After the key is pressed all data transmitted and received on the currently selected port will be displayed The following illustration shows an example lt R gt lt 81 gt lt 03 gt lt 00 gt lt 66 gt lt 0
33. 9 2 3 8 1 8 1 0 011 1001_T11_ 021 001 031 001 041 001 051 001 061 001 071 0 _TT__TT_ lt R gt lt 01 gt lt 02 gt lt 00 gt lt 00 gt lt 00 gt lt 0A gt lt F8 gt lt 0D gt lt R gt _TT__TT_ 011 1B81_TT__TT_ lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt 0A gt lt C05 gt lt CD gt lt R gt _TT__TT_I 0011011 001_TT_ 02119011051100110 1 9911051190110611001107119 Qoeoqeeqcoronewveo cew 0 D 01 71 01 Bl 01 4 01 1 01 4 8 2 1 01 21 TT TT ZR 5 lt D1 gt lt B4 gt lt B0 gt lt 00 gt lt B0 gt lt DA gt lt 70 gt lt OD gt lt R gt T T 01 11001_11_ 021 0011031 1001 041 001 051 001 0611001 071 0011 _ TT_ lt R gt lt 01 gt lt 02 gt lt 00 gt lt 00 gt lt 00 gt lt 0A gt lt F8 gt lt 0D gt lt R gt _TT__TT_ TT 11881_TT__TT_ lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt BA gt lt C5 gt lt C0D gt lt R gt _TT__ Page 56 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual The lt R gt means that the module is transitioning the communications line to a transmit state All characters shown in lt gt brackets are characters being sent out by the module The lt R gt shows when the module is done transmitting data and is now ready to receive information back And finally all characters shown in the
34. 998 This block does not contain any data When the processor places a value of 9998 in word 0 of the output image the module will perform a warm start This involves clearing the configuration and all program status data Finally the program will load in the configuration information from the Flash ROM and begin running There is no positive response to this message other than the status data being set to zero and the block polling starting over Cold Boot Block 9999 This block does not contain any data When the processor places a value of 9999 in word 0 of the output image the module will perform a hardware restart This will cause the module to reboot and reload the program There is no positive response to this message other than the status data being set to zero and the block polling starting over ProSoft Technology Inc Page 81 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Master Command List The MVI94 MCM communication module s primary services are data concentration and communication gateway The Modbus master port polls Modbus slave devices based on user defined commands and places the data in the virtual Modbus database The Flex I O bus interfaces with this database to a Flex processor The user is responsible for defining the structure and content of the virtual Modbus database In order to interface the virtual Modbus database with M
35. BT Read Start Register to the input image words 2 to 7 It then sets the current read block code in word 1 of the input image To trigger the write operation the program places the current write block code into word 0 of the input image 3 The Flex processor recognizes a new value in word 0 of the input image based on the last_read_block_code not equal to read_block_code in its ladder logic The ladder logic computes the offset into the file based on the following formula Page 76 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual read_file offset read_block_code 1 6 4 The new data contained in the input image words 2 to 7 is copied to the offset in the processor s user data file The last_read_block_code storage register in the processor is updated with the new read_block_code Note If the data area transferred from the module exceeds the size of a single user file in the Flex processor logic will be required to handle multiple files 5 The ladder logic next examines the value of the write_block_code and computes the offset into the read data file as follows write _ file offset read_block_code 1 6 6 The required 6 word read data is copied to the module s output image words 1 to 6 To trigger the transfer operation the ladder logic moves the write_block_code into word 0 of the output im
36. Codes 94 Modbus Exception Responses 92 Modbus Protocol Specification 83 Module Configuration 48 Module Error Codes 62 Mounting the MVI 94 Flex I O Base 13 Moving Back Through 5 Pages of Commands 51 Moving Back Through 5 Pages of Registers 58 Moving Forward Skipping Through 5 Pages of Commands 51 Moving Forward Skipping Through 5 Pages of Registers 58 MVI Multi Vendor Interface Modules 3 MVI94 Markings 3 N Navigation 46 No Other Warranties 106 Node 37 ProSoft Technology Inc March 29 2011 Page 107 of 109 Index User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module O Opening the Client Command Error List Menu 49 Opening the Command List Menu 49 Opening the Data Analyzer Menu 48 Opening the Database View Menu 49 P Pass Through Blocks 9956 to 9958 9960 80 Pinouts 3 17 68 71 Poll Interval Time 36 Preset Multiple Registers Function Code 16 91 Preset Single Register Function Code 06 89 Product Specifications 65 ProSoft Technology Product Documentation 2 PRT1 63 PRT2 63 Q Quick Start 9 R Read Coil Status Function Code 01 84 Read Floating Point Data 26 Read Floats with Single Modbus Register Address Enron Daniel Float 30 Read Holding Registers Function Code 03 86 Read Input Registers Function Code 04 87 Read Input Status Function Code 02 85 Read Mult
37. D plus freight charges duties and taxes as applicable A new purchase order will be required or authorization to use the purchase order submitted for evaluation fee The following is a list of non repairable units 3150 All 3750 3600 All 3700 3170 All 3250 1560 Can be repaired only if defect is the power supply 1550 Can be repaired only if defect is the power supply 3350 3300 1500 All O LOO 30 0540 Or 0 00 50 Page 102 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Support Service amp Warranty Serial Communications Modbus Communication Module User Manual 6 2 LIMITED WARRANTY This Limited Warranty Warranty governs all sales of hardware software and other products collectively Product manufactured and or offered for sale by ProSoft Technology Incorporated ProSoft and all related services provided by ProSoft including maintenance repair warranty exchange and service programs collectively Services By purchasing or using the Product or Services the individual or entity purchasing or using the Product or Services Customer agrees to all of the terms and provisions collectively the Terms of this Limited Warranty All sales of software or other intellectual property are in addition subject to any license agreement accompanying such software or other intellectual property 6 2 1 What Is Covered By This Warranty a Warranty On New
38. E CFG Packet ri Error checking CRC File size 6K Retries 0 si Total retries he Files 1 of 1 Last error File TUTTI 5K of BK Elapsed 00 00 01 Remaining Throughput When the file transfer is complete the module s configuration debug screen indicates that the module has reloaded program values and displays information about the module Receiving configuration file TRANSFERRING CONFIGURATION FROM PC TO ProSoft MODULE Using the Ymoden file transfer protocol Select the SEND menu option uration file ecc FILE TRANSFERRED FROM PC UNIT Reloading Program Values Read Conficuration 8 Your module now contains the new configuration ProSoft Technology Inc Page 43 of 109 March 29 2011 Configuration MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Page 44 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual 4 Diagnostics and Troubleshooting In This Chapter The Configuration DebUg Menu eceeeeeeeeeeeeeeeeneeeeeeeteneeesetessaeereaees 45 Using the Configuration Debug Port cecceeeseseseeeeereteeeeesteseneeeeaees 47 Module Configuration cccceesceeeeeceneeeeeeeceeeseeeeseneeeeeeeseaeeeneeeseaeeenaees 48 Error Stat si Data icon pa o paria 60 SN A a dann aiid vane avian ea
39. I O Platform User Manual Serial Communications Modbus Communication Module Transferring the Configuration File from The Module to the PC On the Diagnostics Menu this is referred to as Send Module Configuration Press S to send upload the configuration file from the module to your PC Press Y to confirm the file transfer and then follow the instructions on the terminal screen to complete the file transfer process After the file has been successfully uploaded you can open and edit the file to change the module s configuration Transferring the Configuration File from the PC to the Module On the Diagnostics Menu this is referred to as Receive Module Configuration Press R to receive download the configuration file from your PC to the module and store the file on the module s Compact Flash Card Personality Module or Flash RAM Press Y to confirm the file transfer and then follow the instructions on the terminal screen to complete the file transfer process After the file has been successfully downloaded the module will restart the program and load the new configuration information Review the new configuration using menu commands 6 and 0 to verify that the module is configured correctly Viewing Version Information Press V to view version information for the module Use this command to view the current version of the software for the module as well as other important values You may be asked to provide this
40. Male Config Debug Port 5 2 3 RS 485 Application Port s The RS 485 interface requires a single two or three wire cable The Common connection is optional depending on the RS 485 network devices used The cable required for this interface is shown below RS 485 Application Port Cable DB 9 Male RS 485 Device TxD RxD 1 KH TxD RxD TxD RxD s H toro Signal Signal Common Common Note Terminating resistors are generally not required on the RS 485 network unless you are experiencing communication problems that can be attributed to signal echoes or reflections In these cases installing a 120 ohm terminating resistor between pins 1 and 8 on the module connector end of the RS 485 line may improve communication quality Page 70 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual 5 2 4 RS 422 The RS 422 interface requires a single four or five wire cable The Common connection is optional depending on the RS 422 network devices used The cable required for this interface is shown below RS 422 Application Port Cable DB 9 Male RS 422 Device TxD ro TxD e o0 Signal Signal Common Common RxD TxD RxD s H mo RS 485 and RS 422 Tip If communication in the RS 422 or RS 485 mode does not work at first despite all attempts try switching termination polarities Some manufacturers int
41. None 1 Odd 2 Even 3 Mark and 4 Space Data Bits 5to8 This parameter sets the number of data bits for each word used by the protocol Stop Bits 1or2 This parameter sets the number of stop bits to be used with each data value sent RTS On 0 to This parameter sets the number of milliseconds to delay after 65535 RTS is asserted before the data will be transmitted RTS Off 0 to This parameter sets the number of milliseconds to delay after 65535 the last byte of data is sent before the RTS modem signal will be set low Minimum 0 to This parameter specifies the minimum number of Response Delay 65535 milliseconds to delay before responding to a request message This pre send delay is applied before the RTS on time This may be required when communicating with slow devices Use CTS Line YorN This parameter specifies if the CTS modem control line is to be used If the parameter is set to N the CTS line will not be monitored If the parameter is set to Y the CTS line will be monitored and must be high before the module will send data This parameter is normally only required when half duplex modems are used for communication 2 wire Modbus Master Al Configuration header for Modbus master Command Count 0to100 This parameter specifies the number of commands to be processed by the Modbus Master port Page 96 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Co
42. Output I O wiring must be in accordance with Class I Division 2 wiring methods Article 501 4 b of the National Electrical Code NFPA 70 for installation in the U S or as specified in Section 18 1J2 of the Canadian Electrical Code for installations in Canada and in accordance with the authority having jurisdiction The following warnings must be heeded WARNING EXPLOSION HAZARD SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS DIV 2 WARNING EXPLOSION HAZARD WHEN IN HAZARDOUS LOCATIONS TURN OFF POWER BEFORE REPLACING OR WIRING MODULES WARNING EXPLOSION HAZARD DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON HAZARDOUS THIS DEVICE SHALL BE POWERED BY CLASS 2 OUTPUTS ONLY MVI Multi Vendor Interface Modules WARNING EXPLOSION HAZARD DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON HAZARDOUS AVERTISSEMENT RISQUE D EXPLOSION AVANT DE D CONNECTER L QUIPEMENT COUPER LE COURANT OU S ASSURER QUE L EMPLACEMENT EST DESIGNE NON DANGEREUX Warnings North America Warnings A Warning Explosion Hazard Substitution of components may impair suitability for Class I Division 2 B Warning Explosion Hazard When in Hazardous Locations turn off power before replacing or rewiring modules Warning Explosion Hazard Do not disconnect equipment unless power has been switched off or the area is known to be nonhazard
43. ProSoft MEX wo EGO Where Automation Connects NRAX MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module March 29 2011 USER MANUAL Your Feedback Please We always want you to feel that you made the right decision to use our products lf you have suggestions comments compliments or complaints about our products documentation or support please write or call us How to Contact Us ProSoft Technology 5201 Truxtun Ave 3rd Floor Bakersfield CA 93309 1 661 716 5100 1 661 716 5101 Fax www prosoft technology com support prosoft technology com Copyright 2011 ProSoft Technology Inc all rights reserved MVI94 MCM User Manual March 29 2011 ProSoft Technology ProLinx inRAx ProTalk and RadioLinx are Registered Trademarks of ProSoft Technology Inc All other brand or product names are or may be trademarks of and are used to identify products and services of their respective owners ProSoft Technology Product Documentation In an effort to conserve paper ProSoft Technology no longer includes printed manuals with our product shipments User Manuals Datasheets Sample Ladder Files and Configuration Files are provided on the enclosed CD ROM in Adobe Acrobat Reader file format PDFs These product documentation files may also be freely downloaded from our web site www prosoft technology com Important Installation Instructions Power Input and
44. Select the RECET Building configuration file image from module Ready to Sendt Page 40 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual When the configuration file has been transferred to your PC the dialog box will indicate that the transfer is complete Ee Et Yew Col pade Hep Ds 305 Press Y key to confirm configuration send Sending configuration file TRANSFERRING CONFIGURATION FILES FROM ProSoft MODULE TO PC he Ynoden protocol is used to send the file from the module Select the RECEIVE menu option and destination directory Building configuration file image from module Ready to Send CONFIGURATION FILE TRANSFERRED TO PC Press Y key to confirm configuration send Sending configuration file TRANSFERRING CONFIGURATION FILES FROM ProSoft MODULE TO PC e Ynoden protocol is used to send the file from the module Select the RECEIVE menu option and destination directory g configuration file ima 3 fron module Ready to Send BOWE ADRA FTON FILE TRANSFERRED Connected 0 90 07 foto detect SNOD EM The configuration file is now on your PC at the location you specified 8 You can now open and edit the file in a text editor such as Notepad When you have finished editing the file save it and close Notepad 3 7 4 Transferring the Configuration File to the Module Perform the following steps
45. age 7 The module s program recognizes the new write_block_code It transfers the data to the correct offset in the virtual Modbus database using the following function Modbus_offset BT write_Start_Register read_block_code 1 6 8 The module sets the last_write_block_code to the value of write_block_code 9 The module now selects the next read and write blocks The data for the write operation is placed in the input image and the write_block_code is set The module triggers the transfer operation by setting the new read_block_code in word 0 of the input image The sequence continues at step 3 The previous discussion is for normal data transfer operation The following table lists the block identification codes used by the module Type Number Description R W 1 to 666 Data blocks used to transfer data from the module to the backplane and from the backplane to the module The module s input output images are used for the data transfers R 1000 to 1255 These blocks transfer event messages Modbus commands from a device on the backplane to the module The block number contains the slave module for the command For example to use slave device 5 attached to the master port the block number 1005 should be used R 2001 to 2006 These blocks transfer a list of commands to execute from a device on the backplane to the module The number of commands to be considered is coded in the block number For example
46. also works as an input output module between itself and the Rockwell Automation backplane and processor The module uses an internal database to pass data and commands between the processor and Master and Slave devices on MODBUS networks 5 3 2 Virtual Modbus Database Concepts Central to the functionality of the module is the virtual Modbus database This database is used as the interface between remote Modbus master and slave devices and the Flex I O bus The size content and structure of the database are completely user defined The Flex I O bus reads data from and write data to the database using the backplane interface The module interfaces data contained in remote Modbus slave devices to the virtual Modbus database when using the Modbus master port User commands are issued out the master port from a command list These commands gather or control data in the Modbus slave devices When configured as a Slave control information from the Modbus master and data from the processor are exchanged over the backplane Pass through mode allows the passing of single bit or register data directly to the processor bypassing the Modbus database The following diagrams illustrate the relationships discussed above ProSoft Technology Inc Page 73 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module No Pass Through Modbus Modbus i Databases i Flex I O i Flex PLC S
47. ample below reads registers 40108 through 40110 from Slave 584 number 11 Adr Func Data Start Reg Hi Data Start Reg Lo Data of Regs Hi Data ofRegsLo Error Check Field 11 03 00 6B 00 03 CRC Page 86 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual Response The addressed Slave responds with its address and the function code followed by the information field The information field contains 1 byte describing the quantity of data bytes to be returned The contents of the registers requested DATA are two bytes each with the binary content right justified within each pair of characters The first byte includes the high order bits and the second the low order bits Because the Slave interface device is normally serviced at the end of the controller s scan the data will reflect the register content at the end of the scan Some Slaves will limit the quantity of register content provided each scan thus for large register quantities multiple transmissions will be made using register content from sequential scans In the example below the registers 40108 to 40110 have the decimal contents 555 0 and 100 respectively Adr Func ByteCnt HiData LoData HiData LoData HiData LoData Error Check Field 11 03 06 02 2B 00 00 00 64 CRC 5 4 5 Read Input Registers Function Code 04 Query Function code 04 obtains the contents
48. are returned with an error message Error Status Block Pointer 1 to 3995 This value represents the relative starting position in the module s internal Modbus database where the Error Status data is stored The table can be placed anywhere in the module s data space The content of the Error Status table is updated at the frequency defined in the following parameter If a value of 1 is set for the parameter the data is not placed in the database Error Status Frequency 0 to 65535 This parameter specifies the number of program cycles between each update of the Error Status block data in the module If the parameter is set to a value of 0 the data is never updated BT Read Start Register 0 to 3995 This parameter specifies the starting register in the internal Modbus database to write over the backplane BT Read Register Count 12 to 3996 This parameter specifies the number of registers in the internal Modbus database to write over the backplane This parameter computes the number of blocks to transfer from the module to the backplane The number of blocks must be gt 2 for proper backplane data transfer BT Write Start Register 0 to 3995 This parameter specifies the starting register in the internal Modbus database to fill with data read over the backplane BT Write Register Count 12 to 3996 This parameter specifies the number of registers in the internal Modbus database
49. at Start parameters within the module configuration For all applications floating point data can be read froma device without any changes to the Float Flag and Float Start parameters You only need to configure these parameters to issue a Write command to a device that uses a single Modbus address such as 47001 to represent a single floating point value The MVI94 MCM module can be used with many different processors The following describes using the module with a ControlLogix processor 3 5 1 Floating Point Data Handling Modbus Master In many applications it is necessary to read or write floating point data to the Slave device The sample program only provides an INT array for the ReadData and Write Data array 16 bit signed integer value In order to read write floating point data to and from the Slave device you must add additional ladder to handle the conversion of the data to a REAL data type within the ControlLogix processor This is very easy to accomplish The following topics show how to read or write data to a Slave device These topics also show when to use the Float Flag and Float Start parameters within the module configuration For all applications floating point data can be read from a device without any changes to the Float Flag and Float Start parameters You only need to configure these parameters to issue a Write command to a device that uses a single Modbus address such as 47001 to represent a single floating poi
50. ate Enron or Daniel floating point addressing Copying the data to the MCM DATA WRITEDATA array and from the MCM DATA READDATA array is the same as described in the section above The main difference is the addressing of the module For example an Enron Float device is required to access address 47001 for floating point data and each Modbus register would emulate a single float value does not require 2 Modbus addresses for 1 float value A Master device requiring this type of addressing would require that for every count of 1 the MVI94 MCM module responds to the request message with 4 bytes one 32 bit REAL value To emulate this addressing the module has the parameters MCM CONFIG PORTX FLOATFLAG FLOATSTART and FLOATOFFSET Value Description FloatFlag Tells the module to use the FloatStart and FloatOffset parameters listed below FloatStart Determines what starting address on the Modbus network to treat as floating point data A value of 7000 will signal the module that address 47001 on the Modbus network is the starting location for Modbus floating point data Every address will occupy 2 registers within the modules database FloatOffset Determines the address within the module to which to associate the data from the FloatStart section Here is a sample configuration for the module MCM CONFIG Port2 FloatFlag MCM CONFIG Port2 FloatStart MCM CONFIG Port2 FloatOffset ProSoft Technology Inc Page 3
51. ation receive Receiving configuration file TRANSFERRING CONFIGURATION FROM PC TO ProSoft NODULE Using the Ymoder file transfer protocol Select the SEND menu option and transfer the configuration file B Block Transfer Statistics C Hodule Configuration D Database View Receive Module Configuration Send Module Configuration V Version Information H Harm Boot Module Esc Exit Progran Press Y key to confirm configuration receive Receiving configuration file TRANSFERRING CONFIGURATION FROM PC TO ProSoft NODULE Using the Ymodem file transfer protocol Select the SEND menu option and transfer the configuration file c Page 42 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual The Send File dialog appears E Send File Folder C Documents and Settings mrodriques Filename Browse Protocol xi Close Cancel 5 Use the Browse button to locate the configuration file your computer Note This procedure assumes that you are uploading a newly edited configuration file from your PC to the module However configuration files are also available on the ProSoft CD as well as the ProSoft Technology web site at www prosoft technology com 6 Select ZMODEM as the protocol 7 Click the Send button This action opens the Zmodem File Send dialog box Ymodem file send Sending CAMVIWIL
52. ble describes the parameters defined in this section Modbus Master Configuration header for Modbus Masier Command Count 0 to 100 This parameter specifies the number of commands to be processed by the Modbus Master port Minimum Command 0 to 65535 Delay This parameter specifies the number of milliseconds to wait between issuing each command This delay value is not applied to retries Command Error 1 to 3995 Pointer This parameter sets the address in the internal Modbus database where the command error data is placed If the value is set to 1 the data is not transferred to the database Response Timeout 0 to 65535 This parameter represents the message response timeout period in 1 mSec increments This is the time that a port configured as a master will wait before re transmitting a command if no response is received from the addressed slave The value is set depending upon the communication network used and the expected response time of the slowest device on the network Retry Count 0 to 10 This parameter specifies the number of times a command will be retried if it fails Error Delay Count 0 to 65535 This parameter specifies the number of polls to skip on the slave before trying to re establish communications After the slave fails to respond the master will skip commands to be sent to the slave the number of times entered in this parameter ProSoft Technology In
53. brackets is information being received from another device by the module After taking a minute or two of traffic capture you will now want to stop the Data Analyzer To do so press the S key and you will then see the scrolling of the data stop When you have captured the data you want to save open the Transfer menu and choose Capture Text On the secondary menu choose Stop Transfer Help Send File Receive File Send Text File Pause You have now captured and saved the file to your PC This file can now be used in analyzing the communications traffic on the line and assist in determining communication errors Returning to the Main Menu Press M to return to the Main menu 4 3 5 Database View Menu Press D from the Main menu to open the Database View menu Use this menu command to view the current contents of the module database Press to view a list of commands available on this menu DB Menu Selected DATABASE VIEW MENU ou Menu 0 9 01splay 0 9000 5 5how Again Back 5 Pages P Previous Page Skip 5 Pages N Mext Page G becimal Display H Hexadecimal Display F Float Display A ASCIL Display M Main Menu ProSoft Technology Inc Page 57 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module Viewing Register Pages To view sets of register pages use the keys described below Comman
54. c March 29 2011 Page 23 of 109 Configuration MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module 3 4 Modbus Slave The Modbus Slave section of the configuration file defines the slave address and the data storage offsets for the slave port The following table lists the parameters defined in this section Modbus Slave Configuration header for Modbus Slave Internal Slave ID 0 to 255 This parameter defines the virtual Modbus slave address for the internal database Any requests received by the port with this address will be processed by the module Each device must have a unique address on a network Bit Input Offset 0 to 3995 This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 2 commands For example if the value is set to 150 an address request of 0 will return the value at register 150 in the database Word Input Offset 0 to 3995 This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 4 commands For example if the value is set to 150 an address request of 0 will return the value at register 150 in the database Output Offset 0 to 3995 This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 1 5 or 15 commands For example if the value is set to 100 an address request of 0 w
55. ccococccnoncnnancnnnnnconononcnnncnnnn nn nan nc nan c nr nrn rca nn 37 3 7 Uploading and Downloading the Configuration File ooonoocinnccnncicinnccnnncnnarnnnancccnnos 38 3 7 1 Required Hardware seiors en ieni a iiia tan nn a EaR Ri a a ia 38 3 7 2 Required O War E iii a 38 3 7 3 Transferring the Configuration File to Your PC oooncccinnccinccicnnnccnoncncannnnnnrnanancnnnnnno 39 3 7 4 Transferring the Configuration File to the Modul8 oooooocccnnccconococinccconcccnancconancninnno 41 4 Diagnostics and Troubleshooting 45 4 1 The Configuration Debug MeNU ccccceeeeeeeeeeeeeeeeeeeeeseaeeeeeeeseaeeseaeeeseaeeseaeeeeaaes 45 4 1 1 Navigate lll aut davetdntyaea less 46 4 1 2 KOYSITOKOS tata a aA a ad 46 ProSoft Technology Inc March 29 2011 Page 5 of 109 Contents User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module 4 2 Using the Configuration Debug PoOrt cccccceeeeeseceeeeneeseeeeeseeeeeeaeeeseaeeseeeessaeeeeaees 47 4 3 Module Configuration cccccceccccceceeeeeeeeeeeeeeseneeeseaeeseaeeeeaeeseeeeseeeeseaeeseueeeseeeseaees 48 4 3 1 Main MOnu eoira aa A cst cua E O a 48 4 3 2 Master Command Error List M Nu ccccceseeeeeeeeeeeeeeeeeeeseaeeeeeeeeseaeeeeneeeseeeesaaes 51 4 3 3 Master Command List Menu cccccecceeeeeeeseneeeeneeeeeeeeseaeeeeaeeseaeeseeeeseaeessneeeeaaes 52 4 3 4 Data Analyzer 53 4 3 5 Database View MENU crnina nae nano rn A rre
56. cecececeseeceneeeeeeeeeeaeeeeaeeseneeceaneeseaeeseaeeseeaeeseeeeseaeessaees 106 6 2 9 Allocation of RISKS 00d 106 6 2 10 Controlling Law and Severability oooooconnnndinncicinnncnnnccnonccnnnncnconcncnnrnn nana cnnnr cc nnncnnno 106 Index 107 ProSoft Technology Inc Page 7 of 109 March 29 2011 Contents MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Page 8 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Quick Start Serial Communications Modbus Communication Module User Manual 1 Quick Start This section describes the procedure to be followed for installing and configuring the module for communications These steps should be followed for successful implementation of a module in a user application 1 2 3 ONO Ul 10 11 12 13 14 15 16 Define the communication characteristics of the Modbus port If configured as a Modbus master define the command lists to be used Fill in the blank configuration form for application using the data sets defined in steps one and two Edit the configuration text file 94MCMM CFG or 94MCMS CFG using Notepad or some other text editor to reflect the desired data from the configuration form and save the file under a different name The example 94MCMM CFG file is shipped in the module s memory and is available from the www prosoft technology com web site Connect the module to a 24 Vdc
57. ced in the virtual Modbus database Any write requests for the Modbus slave devices are sourced with data from the virtual Modbus database The module can be configured to place slave devices that are not responding to commands at a lower priority If the module recognizes a slave device has failed to respond to a message after the user defined retry count it will mark the slave as in communication failure and set the error delay counter to the specified value Each time the module encounters this slave in the command list the counter will be decremented When the value reaches zero the slave will be placed in an active status This facility can improve communication throughput on the Modbus network Commands can be activated in the module under processor control This feature permits the processor to issue a command in the command list under program control When a command is activated it will be placed in the command queue for immediate execution Normal command polling will begin after the command queue is completely processed Additionally the processor can send a command directly to any slave attached to the Modbus master port This feature can be used for commands that are not issued on a regular basis and are not in the command list Commands submitted as events are placed in the command queue for immediate execution They will preempt normal operation of the poll list When the command queue is completely empty normal command polling
58. ck from the module A discussion of each set of codes is given in the following topics Event Blocks 1000 to 1255 These control blocks are sent from the processor to the module to execute a Modbus command out the Modbus master port It should be used for commands that are not found in the command list Use blocks 1000 to 1255 to execute commands in the list under processor control The format for this block is shown in the following table Block Request from Processor to Module Word Offset Description 0 This word contains the slave device address on the Modbus network to be considered with the command This value is added 0 to 255 to the value of 1000 This generates a block identification code of 1000 to 1255 1 This word contains the internal Modbus address in the module for the command 2 This word contains the count parameter that determines the number of digital points or registers to associate with the command 3 The parameter specifies the swap type for the data This function is only valid for function code 3 6 and 16 4 This word contains the Modbus function code for the command 5 This word contains the Modbus address in the slave device to be associated with the command 6 Reserved The data contained in the block is used by the module to construct a valid Modbus command and defines what data in the virtual Modbus database to use with the command These parameters are the same as defined for
59. cnnnnnn nono n crac n corn n anna ran nn narra ran n rra n ra nannr nana ra rannncas 99 6 1 Return Material Authorization RMA Policies and Conditions ooonncocinnccnnnccc 101 Page 6 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Contents Serial Communications Modbus Communication Module User Manual 6 1 1 Returning Any Product cuina 101 6 1 2 Returning Units Under Warranty oooooccccnnccccccnncoccncnanancnnoncnncnnnnnnn conca nnn rca ncnnnnnnn 102 6 1 3 Returning Units Out of Warranty ooooconocccincccinnccconcccnancnnnnnnconncanancn nana n naar ca nannnnnnncnnns 102 6 2 LIMITED WARRANTY aa aaa a a a r a ea eaae SEERE 103 6 2 1 What Is Covered By This Warranty c ccccccceseeeeeeneeeeneeeseaeeseeeeseaeessneeseaeetias 103 6 2 2 What Is Not Covered By This Warranty ccccceseeeeeeeeeeeeeseneeseeeeeeeaeeseeeeenaeetaas 104 6 2 3 Disclaimer Regarding High Risk Activities 00 0 0 eeeeeeeeeeeeeeeeeneeeeteeeeeeeenaeeeeeeaas 104 6 2 4 Intellectual Property Indemnity ooconnoccnnnnncccc nnnoccccnnnoncnnonconccnonarn coronan cnn naar cnn 105 6 2 5 Disclaimer of all Other Warranties oooooccncccinncccnnnccnnccnnnncncnnrncnancncnnnncnncnnanrnnnnncnnns 105 6 2 6 Limitation of Remedies rourien a oi e e A A rre 106 6 2 7 Time Limit for Bringing Suit c ceccceceseeeneeeeneeeeeeeeeeeeeeeeeeseaeeseeeeeseaeesseeeseaeeseas 106 6 2 8 No Other Warranties cccccc
60. command to Enron Daniel Floats use the Float Flag and Float Start parameters within the ModDef controller tags The following table describes the addresses that will be written to by the module Address Data Type Parameter 47001 32 bit REAL Demand 47002 32 bit REAL Reactive Power 47003 32 bit REAL Apparent Power 47004 32 bit REAL Power Factor 47005 32 bit REAL Voltage Line to Line 47006 32 bit REAL Voltage Line to Neutral 47007 32 bit REAL Current Configure the Float Start and Float Flag parameters as shown MCM CONFIG Port FloatFlag MCM CONFIG Port1 FloatStait The Float Flag causes the module to use the FloatStart parameter to determine which DevAddress requires a write command to issue double the number of bytes With the above configuration any DevAddress gt 7000 is known to be floating point data Therefore a count of 1 will send 4 bytes of data instead of the normal 2 bytes of data to a non Enron Daniel floating point register 1 First copy the floating point data from the ControlLogix processor into the MCM DATA WRITEDATA array used by the MVI94 MCM module Below is an example 2 The length of this COP statement must now be 14 This will COP as many of the MCM_FLOAT_DATA values required to occupy the MCM DATA WRITEDATA array for a length of 14 This will take 7 registers MCM_FLOAT_DATA O TO 6 and place that data into MCM DATA WRITEDATA O To 13 T
61. ction fields the message requires that the information field contain the initial coil address to be read Starting Address and the number of locations that will be interrogated to obtain status data The addressing allows up to 2000 coils to be obtained at each request however the specific Slave device may have restrictions that lower the maximum quantity The coils are numbered from zero coil number 1 zero coil number 2 one coil number 3 two and so on The following table is a sample read output status request to read coils 0020 to 0056 from Slave device number 11 Adr Func Data Start PtHi Data Start PtLo Data OfPtsHo Data OfPtsLo Error Check Field 11 01 00 13 00 25 CRC Page 84 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual Response An example response to Read Coil Status is as shown in Figure C2 The data is packed one bit for each coil The response includes the Slave address function code quantity of data characters the data characters and error checking Data will be packed with one bit for each coil 1 ON 0 OFF The low order bit of the first character contains the addressed coil and the remainder follow For coil quantities that are not even multiples of eight the last characters will be filled in with zeros at high order end The quantity of data characters is always specified as quantity
62. ction Code 3 DevAddress 256 will read Modbus address 40257 of the Slave device Page 26 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual Along with the Function Code 3 DevAddress 256 will read Modbus address 40257 of the Slave device The above command will read 40257 and 40258 of the Modbus Slave 1 and place that data in MCM DATA READDATA O and 1 Within the controller tags section of the ControlLogix processor it is necessary to configure a tag with the data type of REAL as shown in the following illustration Energy Consumption REAL 1 Float Copy data from the MCM DATA READDATA O and 1 into the tag ENERGY_CONSUMPTION that has a data type of REAL Use a COP statement within the ladder logic Here is an example MCM DATA ReadData 0 Energy_Consumption Length 1 Because the tag MCM DATA READDATA O should only be used within the above command an unconditional COP statement can be used Notice the length of the COP statement is a value of 1 Within a Rockwell Automation processor a COP statement will copy the required amount of Source values to fill the Dest tag for the Length specified Therefore the above statement will copy ReadData 0 and 1 to fill the 32 bits required for the tag Energy_Consumption Note Do not use a MOV statement A MOV will convert the
63. d Description 0 Display registers O to 99 1 Display registers 1000 to 1099 2 Display registers 2000 to 2099 And so on The total number of register pages available to view depends on your module s configuration Displaying the Current Page of Registers Again Press S from the Database View menu to show the current page of registers again DATABASE DISPLAY 6 TO 99 lt DECIMAL gt 188 i i 182 4 5 6 8 9 18 ii 12 13 14 15 16 a a a B a a B a a a a a a a a a a a a a a a a a a a a B a a a a a a a a a a a a a a a a a a a a a a a a a a a a B a a a a a a B a a a a a a a a a a 8 8 B B a a a a B B This screen displays the current page of 100 registers in the database Moving Back Through 5 Pages of Registers Press from the Database View menu to skip five pages back in the database to see the 100 registers of data starting 500 registers before the currently displayed page Moving Forward Skipping Through 5 Pages of Registers Press from the Database View menu to skip five pages ahead in the database to see the 100 registers of data starting 500 registers after the currently displayed page Viewing the Previous Page of Registers Press P from the Database View menu to display the previous page of data Viewing the Next Page of Registers Press N from the Database View menu to display the next page of data Page 58 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubl
64. data from the Source register to the destination register data type This would create a data casting statement and will result in the loss or corruption of the original data ProSoft Technology Inc Page 27 of 109 March 29 2011 Configuration MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module Read Multiple Floating Point Registers The following table is an example to read Multiple Floating Point values and device addresses The table shows 7 consecutive floating point values 14 Modbus addresses Value Description Type 40261 KW Demand power Float upper 16 bits 40263 VAR Reactive Power Float upper 16 bits 40265 VA Apparent Power Float upper 16 bits 40267 Power Factor Float upper 16 bits 40269 VOLTS Voltage line to line Float upper 16 bits 40271 VOLTS Voltage line to neutral Float upper 16 bits 40273 AMPS Current Float upper 16 bits Configure the command to read these 7 floats as follows MCM CONFIG Portl MasterCmd 0 AE MCM CONFIG Portl MasterCmd 0 Enable 1 MCM CONFIG Portl MasterCmd 0 Int ddress 1000 MCM CONFIG Portl MasterCmd 0 Polllnt 0 MCM CONFIG PortlMasterCmd 0 Count 14 MCM CONFIG Portl MasterCmd 0 Swap 0 MCM CONFIG Portl MasterCmd 0 Node 1 MCM CONFIG Portl MasterCmd 0 Func 3 MCM CONFIG Portl MasterEmd 0 DevAddress 260 Configure an array of 7 floats within the ControlLogix processor as shown in the followin
65. e Any requests received by the port with this address will be processed by the module Verify that each device has a unique address on a network Bit Input Offset 0 to 3995 This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 2 commands For example if the value is set to 150 an address request of 0 will return the value at register 150 in the database Word Input Offset 0 to 3995 This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 4 commands For example if the value is set to 150 an address request of 0 will return the value at register 150 in the database Output Offset 0 to 3995 This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 1 5 or 15 commands For example if the value is set to 100 an address request of 0 will return the value at register 100 in the database Holding Register Offset 0 to 3995 This parameter specifies the offset address in the internal Modbus database for network requests for Modbus function 3 6 or 16 commands For example if the value is set to 50 an address request of 0 will return the value at register 50 in the database Use Guard Band Timer YorN This parameter specifies if the packet Guard Band is to be used This is used for multi drop only Guard Band
66. e address zero Broadcast mode all Slave controllers will load the specified register with the contents specified Note Functions 5 6 15 and 16 are the only messages that will be recognized as valid for broadcast Adr Func DataStartReg DataStartReg Data of Regs Hi Data ofRegsLo Error Check Field Hi Lo 11 06 00 01 00 03 CRC ProSoft Technology Inc Page 89 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Response The response to a preset single register request is to re transmit the query message after the register has been altered Adr Func DataRegHi DataRegLo ODatalnputRegHi Data Input RegLo Error Check Field 11 06 00 01 00 03 CRC 5 4 8 Force Multiple Coils Function Code 15 Query This message forces each coil in a consecutive block of coils to a desired ON or OFF state Any coil that exists within the controller can be forced to either state ON or OFF However because the controller is actively scanning unless the coils are disabled the controller can also alter the state of the coil Coils are numbered from zero coil 00001 zero coil 00002 one and so on The desired status of each coil is packed in the data field one bit for each coil 1 ON 0 OFF The use of Slave address 0 Broadcast Mode will force all attached Slaves to modify the desired coils Note Functions 5 6 15 and 16 are the only messages
67. e command list and the slave status list contains the current communication status of each slave on the master port 4 4 1 Error and Status Data Table The error status data table is located at the virtual Modbus address assigned by the user If the address is set to 1 or the frequency parameter is set to 0 the data will not be placed in the database It will only be available through the Configuration Debug Port If valid address and frequency values are assigned the module will update the Modbus data area The data area will be initialized with zeros whenever the processor is initialized This occurs during a cold start power on reset reset push button pressed or a warm boot operation commanded or loading of new configuration The data area is a 22 word register block The structure of the block is shown in the following table Word Description System Information 0 Program Cycle Counter 1 Product Name ASCII MCM 2 3 Revision ASCII 4 5 Operating System Rev ASCII 6 7 Production Run Number ASCII 8 Modbus Port 9 Number of Command Requests 10 Number of Command Responses 11 Number of Command Errors 12 Number of Requests 13 Number of Responses 14 Number of Errors Received 15 Number of Errors Sent Block Transfer Statistics 16 Total Number of Read Block Operations 17 Total Number of Write Block Operations 18 Total Number of
68. e list to determine the success or failure of the command If the command fails use the error code to determine the cause of failure Page 62 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual 4 5 LED Definition This section defines the indications provided on the MVI94 MCM module through LEDs A description of each LED is provided in the following topics 4 5 1 PRT1 This LED indicates data transmit and receive activity on the configuration port When the TXD or RXD pin is active on the port the LED will illuminate green When the port is not active the LED remains in the off state 4 5 2 Ul This LED indicates backplane data transfer operation When the module is successfully writing data to the FLEX I O backplane the LED will be in the off state When the module is reading a new block of data from the FLEX I O backplane the LED will be in the on state amber During normal operation of the module this LED should turn on and off at a vary rapid rate If the LED never turns on check your ladder logic to verify that the data transfer is set up correctly 4 5 3 U2 This LED indicates communication errors on the Modbus master port The LED is illuminated amber when no error exists on the port If a communication error is recognized on the port the LED will turn off If the LED is off check for errors
69. e those specified in the Modbus protocol Each command list record has the same format The first part of the record contains the information relating to the MVI94 MCM communication module and the second part contains information required to interface to the Modbus slave device The command structure is displayed in the following table for all functions supported Module Information _ Device Information MODBUS COMMAND STRUCTURE 1 7 8 Code Address Time Count Code Code Address Register Register Code Register Seconds Count 0 Node 4 Register g Code Register__ Seconds Count 0 Node 6 Register Code Register Seconds Count_ 0 Node 15 Register Code Register Seconds Count 0 Node 16 Register node destination address Each parameter is discussed in the following topics 3 6 1 Enable Code This field defines whether the command is to be executed and under what conditions If the parameter is set to 0 the command is disabled and will not be executed in the normal polling sequence The command can be executed under the control of the processor using a Command Control block Setting the parameter to a value of 1 for the command causes the command to be executed each scan of the command list if the Poll Interval Time is set to zero If the Poll Interval time is set the command will be executed when the interval timer expires If the parameter is set t
70. e to the Command Request is to re transmit the message as received after the coil state has been altered Adr Func Data Coil Hi Data Coil Lo Data On Off Data Error Check Field 11 05 00 AC FF 00 CRC The forcing of a coil via MODBUS function 5 will be accomplished regardless of whether the addressed coil is disabled or not n ProSoft products the coil is only affected if the necessary ladder logic is implemented Note The Modbus protocol does not include standard functions for testing or changing the DISABLE state of discrete inputs or outputs Where applicable this may be accomplished via device specific Program commands In ProSoft products this is only accomplished through ladder logic programming Coils that are reprogrammed in the controller logic program are not automatically cleared upon power up Thus if such a coil is set ON by function Code 5 and even months later an output is connected to that coil the output will be hot 5 4 7 Preset Single Register Function Code 06 Query Function 06 allows the user to modify the contents of a holding register Any holding register that exists within the controller can have its contents changed by this message However because the controller is actively scanning it also can alter the content of any holding register at any time The values are provided in binary up to the maximum capacity of the controller unused high order bits must be set to zero When used with Slav
71. e value here would again be 0 For 31101 or 41101 the value to enter for this parameter would be 1100 ProSoft Technology Inc Page 37 of 109 March 29 2011 Configuration MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module 3 7 Uploading and Downloading the Configuration File ProSoft modules are shipped with a pre loaded configuration file In order to edit this file you may transfer the file from the module to your PC or locate and load the file from the distribution CD ROM supplied with the module After editing you must transfer the file back to the module for your changes to take effect This section describes these procedures Important The illustrations of configuration debug menus in this section are intended as a general guide and may not exactly match the configuration debug menus in your own module For specific information about the configuration debug menus in your module refer to The Configuration Debug Menu page 45 3 7 1 Required Hardware You can connect directly from your PC s serial port to the serial port on the module to view configuration information perform maintenance and send or receive configuration files ProSoft Technology recommends the following minimum hardware to connect your PC to the module 80486 based processor Pentium preferred megabyte of memory Atleast one UART hardware based serial communications port available USB based vi
72. eeeeeeseaeeseeeeeseaeeseaeeseeeseeeess 73 5 3 2 Virtual Modbus Database Concepts oococccccconocicinoccconcnconcnnnnncnnannn conc cncnn nn nana nnnancnnnes 73 5 3 3 Data Mrs A 75 5 4 Modbus Protocol Specification oonnoccinnininnininnncnnncconncccnnrccnnnrnnancnarrnnnnrrnranrnnnnn 83 5 4 1 Commands Supported by the Module cccceseeeeeeeeeeeeeeeseaeeeeeeeseaeeseeeeseeeetas 83 5 4 2 Read Coil Status Function Code 01 cccccccccceceeeeeeeeeeeeeeeneeeseeeeseaeesseaeeseeeeseaees 84 5 4 3 Read Input Status Function Code 02 cccccscceeeceeeeneeeeneeeseeeeeeeeeeaeeseueeeseeeseaees 85 5 4 4 Read Holding Registers Function Code 028 cccccceeececeeeeeeeeeeeeeeseneeeseeessaees 86 5 4 5 Read Input Registers Function Code 04 0 cceesceeeeeeeeseeeeeeeeeeaeeeeeaeeseneeeseeeseaees 87 5 4 6 Force Single Coil Function Code 05 eccceccccceceeeeeeeeeeseeeeeeeeeseeeeseaeeeseaeeseieeeeees 88 5 4 7 Preset Single Register Function Code 06 ccc ceesceeeeeeeeeeeeeeeeeeeeeeseneeeseeessaees 89 5 4 8 Force Multiple Coils Function Code 15 ccccecscceeeseeeeseeeseeeeeeneeeseaeeseneeeseeeseaees 90 5 4 9 Preset Multiple Registers Function Code 16 cccccescceseeeeeeseeseeeeeneeeseeeesees 91 5 4 10 Modbus Exception Responses syisa pi erena a raai EAEAN ERa aA 92 5 5 Configuration Fo Mi ata 95 6 Support Service amp Warranty 99 Contacting Technical Support ooconocccinccccnocaconoccnannnonan
73. em Some radios or modems require hardware handshaking control and monitoring of modem signal lines on the RTS and CTS lines of an RS 232 connection Enable this by setting the UseCTS parameter in the module configuration to 1 5 2 1 RS 232 Application Port s When the RS 232 interface is selected the use of hardware handshaking control and monitoring of modem signal lines is user definable If no hardware handshaking will be used here are the cable pinouts to connect to the port RS 232 Application Port Cable No Handshaking DB 9 Male RS 232 Device Ro 2 to mo 3 ro com 5 com RS 232 Modem Connection Hardware Handshaking Required This type of connection is required between the module and a modem or other communication device RS 232 Application Port Cable Modem Connection DB 9 Male RS 232 Device Signal Signal Common Common DTR DTR The Use CTS Line parameter for the port configuration should be set to Y for most modem applications Page 68 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual RS 232 Null Modem Connection Hardware Handshaking This type of connection is used when the device connected to the module requires hardware handshaking control and monitoring of modem signal lines RS 232 Application Port Cable Hardware Handshaking DB 9 Male RS 232 Device TxD
74. erpret and or A and B polarities differently 5 2 5 DB9 to Mini DIN Adaptor Cable 09 120 Cable Assembly oO Wiring Diagram ProSoft Technology Inc Page 71 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 5 3 Functional Overview The MVI94 MCM communication module interfaces Modbus master and slave devices with the Flex I O system The module contains a virtual Modbus database that is defined by the user When configured as a master this database is used for the request and command messages sent from the Modbus master port to Modbus slave devices As a slave this database serves data to the master device and passes control data to the processor via the backplane Data areas in the virtual Modbus database can be reserved for status and error information generated by the module under user control The virtual Modbus database also interfaces with the Flex I O system using the Flex I O bus backplane Data is made available to the processor ona ControlNet network using this backplane interface Input and output image tables in the module present the data in the virtual Modbus database to the backplane A Modbus master port is present on the communication module to continuously poll Modbus slave devices Up to 100 user defined commands can be defined for the port Data read from Modbus slave devices are pla
75. es required to occupy the MCM DATA WRITEDATA array for a length of 14 This will take 7 registers MCM_FLOAT_DATA O To 6 and place that data into MCM DATA WRITEDATA O TO 13 You must configure the command to write all 7 floats 14 Modbus addresses as follows MCM CONFIG Port MasterCmd 0 eS MCM CONFIG Portl MasterCmd 0 Enable 1 MCM CONFIG Portl MasterCmd 0 Int ddress 0 MCM CONFIG Portl MasterCmd 0 Polllnt 0 MCM CONFIG Portl MasterCmd 0 Count 14 MCM CONFIG Portl MasterCmd 0 Swap 0 MCM CONFIG Portl MasterCmd 0 Node 1 MCM CONFIG Portl MasterCmd 0 Func 16 MCM CONFIG Portl MasterCmd 0 Dev ddress 260 The above command will take the data from MCM DATA WRITEDATA O To 13 and write this information to the Slave device node 1 addresses 40261 to 40274 ProSoft Technology Inc Page 29 of 109 March 29 2011 Configuration MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module Read Floats with Single Modbus Register Address Enron Daniel Float Some Modbus Slave devices use a single Modbus address to store 32 bits of data This type of data is typically referred to as Enron or Daniel Floating Point A device that uses this addressing method may have the following Modbus Memory Map Address Data Type Parameter 47001 32 bit REAL Demand 47002 32 bit REAL Reactive Power 47003 32 bit REAL Apparent Power 47004 32 bit REAL Power
76. eshooting Serial Communications Modbus Communication Module User Manual Viewing Data in Decimal Format Press D from the Database View menu to display the data on the current page in decimal format Viewing Data in Hexadecimal Format Press H from the Database View menu to display the data on the current page in hexadecimal format Viewing Data in Floating Point Format Press F from the Database View menu to display the data on the current page in floating point format The program assumes that the values are aligned on even register boundaries If floating point values are not aligned as such they are not displayed properly Viewing Data in ASCII Text Format Press A from the Database View menu to display the data on the current page in ASCII format This is useful for regions of the database that contain ASCII data Returning to the Main Menu Press M to return to the Main menu ProSoft Technology Inc Page 59 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module 4 4 Error Status Data The module error status data areas are discussed in this section The module contains three areas related to this data The user defines the location of two of these data sets in the virtual Modbus database of the module The error status data contains module data the command error list data set contains the errors associated with th
77. eter sets the number of milliseconds to delay after RTS is asserted before the data is transmitted RTS Off 0 to 65535 This parameter sets the number of milliseconds to delay after the last byte of data is sent before the RTS modem signal will be set low ProSoft Technology Inc March 29 2011 Page 21 of 109 Configuration MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Section Item Value Range Description Minimum Response 0 to 65535 This parameter specifies the minimum number of Delay milliseconds to delay before responding to a request message This pre send delay is applied before the RTS on time This may be required when communicating with slow devices Use CTS Line Yes or No This parameter specifies if the CTS modem control line is to be used If the parameter is set to No the CTS line will not be monitored If the parameter is set to Yes the CTS line will be monitored and must be high before the module will send data This parameter is normally only required when half duplex modems are used for communication 2 wire Page 22 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module Configuration User Manual 3 3 Modbus Master The Modbus Master section of the configuration file defines the command list specifications for the master port The following ta
78. g illustration MCM_Float_Data REAL Float The following COP statement will copy the data from MCM DATA READDATA 0 TO 13 into the array MCM_FLOAT_DATA O To 6 ae ce MCM DATA ReadDatal0 MCM_Float_Data 0 The Length parameter is set to the number of Floating Point values that must be copied from the MCM DATA READDATA array Page 28 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual Write Floats to Slave Device To issue a Write command to Floating Point addresses use the configuration in the following table The table describes the Modbus Map for the Slave device Value Description Type 40261 KW Demand power Float upper 16 bits 40263 VAR Reactive Power Float upper 16 bits 40265 VA Apparent Power Float upper 16 bits 40267 Power Factor Float upper 16 bits 40269 VOLTS Voltage line to line Float upper 16 bits 40271 VOLTS Voltage line to neutral Float upper 16 bits 40273 AMPS Current Float upper 16 bits You must use a COP statement to copy the data from floating point data tags within the ControlLogix processor into the MCM DATA WRITEDATA array used by the MVI94 MCM module Below is an example MCM_Float_Data 0 DATA WriteData 0 The length of this COP statement must now be 14 This will COP as many of the MCM_FLOAT_DATA valu
79. gister at any time The values are provided in binary up to the maximum capacity of the controller 16 bit for the 184 384 and 584 unused high order bits must be set to zero Note Function codes 5 6 15 and 16 are the only messages that will be recognized as valid for broadcast Adr Func Hi LoAdd Quantity Byte Hi Lo Hi Lo Data Error Check Add Cnt Data Data Data Field 11 10 00 87 00 02 04 00 DA 01 02 CRC Response The normal response to a function 16 query is to echo the address function code starting address and number of registers to be loaded Adr Func Hi Addr Lo Addr Quantity Error Check Field 11 10 00 87 00 02 56 ProSoft Technology Inc Page 91 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 5 4 10 Modbus Exception Responses When a Modbus Master sends a request to a Slave device it expects a normal response One of four possible events can occur from the Master s query f the server device receives the request without a communication error and can handle the query normally it returns a normal response If the server does not receive the request due to a communication error no response is returned The Master program will eventually process a timeout condition for the request If the server receives the request but detects a communication error parity LRC CRC no response is returned The Master pro
80. gram will eventually process a timeout condition for the request If the server receives the request without a communication error but cannot handle it for example if the request is to read a non existent output or register the server will return an exception response informing the Master of the nature of the error The exception response message has two fields that differentiate it from a normal response Function Code Field In a normal response the server echoes the function code of the original request in the function code field of the response All function codes have a most significant bit MSB of O their values are all below 80 hexadecimal In an exception response the server sets the MSB of the function code to 1 This makes the function code value in an exception response exactly 80 hexadecimal higher than the value would be for a normal response With the function code s MSB set the Master s application program can recognize the exception response and can examine the data field for the exception code Page 92 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual Data Field In a normal response the server may return data or statistics in the data field any information that was requested in the request In an exception response the server returns an exception code in the data field This defines the server condition
81. gt lt OA gt lt C5 gt lt CD gt lt R gt _TT_ 61 63 14 80 06 06 00 06 06 _TT_ 66 68 96 66 66 68 60 69 66 60 60 66 60 G0 A3 67 _ TT lt R gt lt 01 gt lt 83 gt lt 68 gt lt 668 gt lt 80 gt lt 6A gt lt C5 gt lt CD gt lt R gt _TT_ 61 63 14 68 606 66 66 66 60 66 66 00 00 00 00 00 00 00 _T1_ 00 00 00 00 00 A3 67 _TT_ lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt 0M gt lt 05 gt lt 0D gt lt R gt _T11_ 01 03 14 00 00 00 00 00 00 00 00 00 00 00 00 06 06 06 _11_ 08 00 00 00 00 A3 67 _TT_ lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt 8A gt lt C05 gt lt CD lt R gt _T11_ 01 03 14 08 08 80 80 68 _11_ 80 090 90 99 09 08 00 00 06 06 66 06 00 06 00 A3 67 _TT_ lt R gt lt 01 gt lt 83 gt lt 00 gt lt 00 gt lt 00 gt lt 04 gt lt 05 gt lt CD gt lt R gt _T1F_ 01 03 1 00 00 00 00 00 00 _T1_ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3 67 _TT_ lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt 0A gt lt C05 gt lt CD gt lt R gt _11_ 01 03 14 00 00 00 00 00 00 _11_ 60 09 00 60 00 00 00 00 00 06 90 06 00 96 A3 67 _TT_ lt R gt lt 01 gt lt 83 gt lt B0 gt lt B8 gt lt B0 gt lt BA gt lt C05 gt lt 0D gt lt R gt _11_ 01 03 14 00 08 06 06 09 00 00 08 90 80 08 80 80 09 00 _T1_ 69 08 00 00 00 A3 67 _TT_
82. he following illustration shows the command required to write these 7 Floating Point values MCM CONFIG Portl MasterCmd O Pana MCM CONFIG Portl MasterCmd 0 Enable 1 MCM CONFIG Portl MasterCmd 0 Int ddress MCM CONFIG Portl MasterCmd 0 Polllnt MCM CONFIG Puit Master Cin 0 Cuurit MCM CONFIG Port MasterCmd 0 Swap MCM CONFIG Portl MasterCmd 0 Node MCM CONFIG Portl MasterCmd 0 Func MCM CONFIG Portl MasterCmd 0 Dev ddress ProSoft Technology Inc Page 31 of 109 March 29 2011 Configuration User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module Based on the IntAddress and the configuration within the MCM CONFIG MODDEF section for WriteStartReg and WriteRegCount the data from the tag MCM DATA WRITEDATA O To 6 will be written to Modbus addresses 47001 to 47007 of the Slave device node 1 Note A swap code may be required to put the data in the proper format for the Slave device 3 5 2 Floating Point Data Handling Modbus Slave In most applications the use of floating point data requires no special handling 1 Copy the data to and from the MVI94 MCM module with a tag configured as a data type REAL in the ControlLogix processor Each floating point value will occupy 2 registers on the Modbus network Some Master devices use Enron or Daniel Float data These types of floats require one Modbus register for each float in the module memory If your Master
83. hich you are connecting this Base 2 Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this Base will mate correctly 3 Make certain that the female flexbus connector C is fully retracted into the Base 4 Position the Base on a 35 x 7 5mm DIN rail A at a slight angle with the hook B on the left side of the Base hooked into the right side of the unit on the left 5 Rotate the Base onto the DIN rail with the top of the rail hooked under the lip on the rear of the Base Use caution to make sure that the female flexbus connector does not strike any of the pins in the mating male connector 6 Press the terminal base down onto the DIN rail until flush The locking tab D snaps into position and locks the terminal base to the DIN rail 7 If the Base does not lock in place use a screwdriver or similar device to move the locking tab down press the Base flush with the DIN rail and release the locking tab to lock the base in place 8 Gently push the female flexbus C connector into the adjacent base or adapter male connector to complete the flexbus connections ProSoft Technology Inc Page 13 of 109 March 29 2011 Hardware Installation MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 2 3 Setting Jumpers Before installing the MVI94 module onto its base the module s configuration can be set using the jum
84. ic control direct life support machines or weapons systems in which the failure of the product could lead directly or indirectly to death personal injury or severe physical or environmental damage collectively high risk activities ProSoft specifically disclaims any express or implied warranty of fitness for high risk activities Page 104 of 109 MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Support Service amp Warranty Serial Communications Modbus Communication Module User Manual 6 2 4 Intellectual Property Indemnity Buyer shall indemnify and hold harmless ProSoft and its employees from and against all liabilities losses claims costs and expenses including attorney s fees and expenses related to any claim investigation litigation or proceeding whether or not ProSoft is a party which arises or is alleged to arise from Buyer s acts or omissions under these Terms or in any way with respect to the Products Without limiting the foregoing Buyer at its own expense shall indemnify and hold harmless ProSoft and defend or settle any action brought against such Companies to the extent based on a claim that any Product made to Buyer specifications infringed intellectual property rights of another party ProSoft makes no warranty that the product is or will be delivered free of any person s claiming of patent tradema
85. ill return the value at register 100 in the database Holding Register 0 to 3995 This parameter specifies the offset address in the Offset internal Modbus database for network requests for Modbus functions 3 6 or 16 commands For example if the value is set to 50 and address request of 0 will return the value at register 50 in the database Use Guard Band YorN This parameter specifies if the packet Guard Band Timer is to be used This is used for multi drop only Guard Band 0 to 65535 This parameter specifies the Guard Band time Timeout between packets in multi drop slave mode A value of 0 uses the default time A value of 1 to 65535 sets the time in milliseconds Page 24 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual 3 5 Floating Point Data Handling Modbus Master In many applications it is necessary to read or write floating point data to the device The sample program only provides an INT array for the ReadData and Write Data array 16 bit signed integer value In order to read write floating point data to and from the device you must add additional ladder logic to handle the conversion of the data to a REAL data type within the FLEX processor This is very easy to accomplish The following topics show how to read or write data to a device These topics also show when to use the Float Flag and Flo
86. in the command list to determine the error condition recognized by the module 4 5 4 STS This LED indicates the health of the module When power is applied to the module the LED is illuminated If the LED is green the program is working correctly and the user configuration is being used If the LED is red the program is halted Try restarting the module by cycling power 4 5 5 PRT2 This LED indicates data transmit and receive activity on the Modbus master port When the TXD or RXD pin is active on the port the LED will be green When the port is not active the LED will be off ProSoft Technology Inc Page 63 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Page 64 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual 5 Reference In This Chapter Product Specifications cceeceeseeeeseeeeeeeceaeeesaeeceaeeesaeeseaeeesaeessaeeesaees 65 S Gable Connections clarito tritio 68 Functional OvervieW e essesseeeseeeeeeseteinteensttestrtttnnttnntenetntetntennnnnsnnae 72 Modbus Protocol Specification 00 0 cceesceeeseeeeneeteeeeeeeeseaeeeseeeseeeenaees 83 Configuration ROMs c98 cta de nd 95 5 1 Product Specifications The MVI94 Modbus Master Slave Communication Module allows Rockwell Automat
87. indi North America location in California Tel 1 661 716 5100 E mail support prosoft technology com Languages spoken include English Spanish Latin America Oficina Regional Tel 1 281 2989109 E Mail latinam prosoft technology com Languages spoken include Spanish English Latin America location in Puebla Mexico Tel 52 222 3 99 6565 E mail soporte prosoft technology com Languages spoken include Spanish Brasil location in Sao Paulo Tel 55 1 1 5083 3776 E mail brasil prosoft technology com Languages spoken include Portuguese English Page 100 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM s Flex I O Platform Support Service amp Warranty Serial Communications Modbus Communication Module User Manual 6 1 Return Material Authorization RMA Policies and Conditions The following Return Material Authorization RMA Policies and Conditions collectively RMA Policies apply to any returned product These RMA Policies are subject to change by ProSoft Technology Inc without notice For warranty information see Limited Warranty page 103 In the event of any inconsistency between the RMA Policies and the Warranty the Warranty shall govern 6 1 1 Returning Any Product a In order to return a Product for repair exchange or otherwise the Customer must obtain a Return Material Authorization RMA number from ProSoft Technology and comply with ProSoft Techno
88. information when calling for technical support on the product Values at the bottom of the display are important in determining module operation The Program Scan Counter value is incremented each time a module s program cycle is complete Tip Repeat this command at one second intervals to determine the frequency of program execution Warm Booting the Module Press W from the Main menu to warm boot restart the module This command will cause the program to exit and reload refreshing configuration parameters that must be set on program initialization Only use this command if you must force the module to reboot Page 50 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual Viewing Port Communication Status Press 1 from the Main Menu to view the port communication status for the application port Use this command to view communication status and statistics for the selected port This information can be informative when trouble shooting communication problems Viewing Port Configuration Press 6 from the Main Menu to view configuration information for the application port Use this command to display detailed configuration information for the port Cold Booting the Module Press ESC to restart the module and force all drivers to be loaded The module will use the configuration stored in the mod
89. ion FLEX processors to interface easily with other Modbus protocol compatible devices The module acts as an Options module between the Modbus network and the FLEX backplane Compatible devices include not only Modicon PLCs almost all support the Modbus protocol but also a wide range of process and control devices from a variety of manufacturers Many SCADA packages also support the Modbus protocol 5 1 1 General Specifications Some of the general specifications include Operation via simple ladder logic Complete setup and monitoring of module through Debug port and user configuration file Flex backplane interface via I O access ProSoft Technology Inc Page 65 of 109 March 29 2011 Reference User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module 5 1 2 FLEX I O Interfaces Specification Description Form Factor Single Slot 1794 Backplane compatible Locate in any slot of Backplane Backplane current load 20mA 5V External power supply 12 Vdc to 24 Vdc 340 mA to 170 mA Operating temperature 0C to 55 C 32 F to 131 F Storage temperature 40 C to 85 C 40 F to 185 F Shock 30 g operational 50 g non operational 5 g from 10150 Hz Relative humidity 5 to 95 without condensation LED indicators Module status Backplane transfer status Application status Serial activity and error LED status
90. iple Floating Point Registers 28 30 Redisplaying the Current Page 51 52 Redisplaying the Menu 48 Reference 65 Removing Timing Marks in the Data Analyzer 53 Required Hardware 38 Required Software 38 Return Material Authorization RMA Policies and Conditions 101 Returning Any Product 101 Returning to the Main Menu 52 57 59 Returning Units Out of Warranty 102 Returning Units Under Warranty 102 RS 232 Modem Connection Hardware Handshaking Required 68 Null Modem Connection Hardware Handshaking 69 Null Modem Connection No Hardware Handshaking 69 RS 232 Application Port s 68 RS 232 Configuration Debug Port 70 RS 422 71 RS 485 and RS 422 Tip 71 RS 485 Application Port s 70 S Setting Jumpers 14 Slave Status List 61 Starting the Data Analyzer 54 Stopping the Data Analyzer 55 STS 63 Support Service 8 Warranty 99 Swap Code 36 T The Configuration Debug Menu 38 45 Time Limit for Bringing Suit 106 Transferring the Command Error List to the Processor 80 Transferring the Configuration File from The Module to the PC 50 Transferring the Configuration File from the PC to the Module 50 Transferring the Configuration File to the Module 41 Transferring the Configuration File to Your PC 39 U U1 63 U2 63 Uploading and Downloading the Configuration File 38 Using the Configuration Debug Port 47 V Verify Package Contents 12 Viewi
91. istics ProSoft Technology Inc Page 9 of 109 March 29 2011 Quick Start MVI94 MCM Error No text of specified style in document User Manual Serial Communications Modbus Communication Module Page 10 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module Hardware Installation User Manual 2 Hardware Installation In This Chapter Verify Package Contents Mounting the MVI 94 Flex I O Base Setting Jumpers lt Installing the Module onto the Base Installing the Serial Adapter Cables Wiring the Power Connections ProSoft Technology Inc March 29 2011 Page 11 of 109 Hardware Installation MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 2 1 Verify Package Contents Make sure that you verify the contents of the product before you discard the packing material The following components should be included with the product 1 A MVI94 Flex I O Base 2 A MVI94 Module with 3 jumpers installed 3 One Serial Adapter Cable Page 12 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Hardware Installation Serial Communications Modbus Communication Module User Manual 2 2 Mounting the MVI 94 Flex I O Base DIN Rail Locking gt Lever Ly Y 1 Remove the cover plug if used in the male connector of the unit to w
92. laves Master Bus Processor p Write to Input Wrke for Modbus Read Image Read fam Modbus via Input Ir age Read f om Duput image 1 Read for 1 Modbus Write 1 Funcion 1 I I 1 1 1 Function I 1 1 I 1 Response Write to Output Image Request Pass Through Page 74 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module Reference User Manual 5 3 3 Data Transfer Data is transferred over the backplane using the module s input and output images The module is configured with an eight word input image and a seven word output image The module and the processor use these images to page data and commands The input image is set written by the module and is read by the processor The output image is set written by the Flex processor and read by the module The following diagram shows this relationship PROCESSOR FLEX DATA TRANSFER OPERATION MVI94 MCM MODULE DATA TABLE Write Operation OUTPUT INPUT IMAGE m E IMAGE Write Operation Read Operation VIRTUAL MODBUS DATABASE MIA The module s program is responsible for setting the block identification code used to identify the data block written and the block identification code of the block it wants to read from the processor User configuration information determines the read BT Read
93. logy shipping instructions b In the event that the Customer experiences a problem with the Product for any reason Customer should contact ProSoft Technical Support at one of the telephone numbers listed above page 99 A Technical Support Engineer will request that you perform several tests in an attempt to isolate the problem If after completing these tests the Product is found to be the source of the problem we will issue an RMA c All returned Products must be shipped freight prepaid in the original shipping container or equivalent to the location specified by ProSoft Technology and be accompanied by proof of purchase and receipt date The RMA number is to be prominently marked on the outside of the shipping box Customer agrees to insure the Product or assume the risk of loss or damage in transit Products shipped to ProSoft Technology using a shipment method other than that specified by ProSoft Technology or shipped without an RMA number will be returned to the Customer freight collect Contact ProSoft Technical Support for further information d A10 restocking fee applies to all warranty credit returns whereby a Customer has an application change ordered too many does not need etc Returns for credit require that all accessory parts included in the original box i e antennas cables be returned Failure to return these items will result in a deduction from the total credit due for each missing item ProSoft Technology
94. lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt B0 gt lt BA gt lt 05 gt lt CD gt lt R gt _11_ 01 03 1M 00 00 00 00 00 06 00 00 00 00 00 00 00 90 00 _T1_ 00 00 00 06 00 A3 67 _TT_ lt R gt lt 01 gt lt 03 gt lt 00 gt lt 00 gt lt 00 gt lt BA gt lt 05 gt lt CD gt lt R gt _T1_ 01 03 14 00 08 00 00 98 _11_ 96 06 99 96 09 98 80 89 88 80 80 00 00 90 09 A3 67 _TT_ lt R gt lt 81 gt lt 83 gt lt 86 gt lt 8O gt lt 66 gt lt BA gt lt C5 gt lt CD gt lt R gt _TT_ 61 83 14 00 80 66 66 00 00 _T1_ 00 06 06 00 00 00 00 00 00 00 00 60 00 00 A3 67 _1T_ The Data Analyzer displays the following special characters Character Definition Data enclosed in these characters represent data received on the port lt gt Data enclosed in these characters represent data transmitted on the port lt R gt These characters are inserted when the RTS line is driven high on the port lt R gt These characters are inserted when the RTS line is dropped low on the port lt CS gt These characters are displayed when the CTS line is recognized high _TT_ These characters are displayed when the timing mark interval has been reached This parameter is user defined Page 54 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual
95. luding both parts and labor will be performed at ProSoft s expense All warranty service will be performed at service centers designated by ProSoft b Warranty On Services Materials and labor performed by ProSoft to repair a verified malfunction or defect are warranteed in the terms specified above for new Product provided said warranty will be for the period remaining on the original new equipment warranty or if the original warranty is no longer in effect for a period of 90 days from the date of repair ProSoft Technology Inc Page 103 of 109 March 29 2011 Support Service amp Warranty User Manual 6 2 2 What Is Not Covered By This Warranty a ProSoft makes no representation or warranty expressed or implied that the operation of software purchased from ProSoft will be uninterrupted or error free or that the functions contained in the software will meet or satisfy the purchaser s intended use or requirements the Customer assumes complete responsibility for decisions made or actions taken based on information obtained using ProSoft software b This Warranty does not cover the failure of the Product to perform specified functions or any other non conformance defects losses or damages caused by or attributable to any of the following i shipping ii improper installation or other failure of Customer to adhere to ProSoft s specifications or instructions iii unauthorized repair or maintenance iv attachmen
96. lue is a timing mark The module will print a _TT for every xx milliseconds of no data on the line Usually 10milliseconds is the best value to start with ProSoft Technology Inc Page 55 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module After you have selected the Port Format and Tick we are now ready to start a capture of this data The easiest way to do so is to go up to the top of you HyperTerminal window and do a TRANSFER CAPTURE TEXT as shown below Transfer Help Send File Receive File Capture Text Send Text File Capture to Printer After selecting the above option the following window will appear Folder CAProSoft txt Eile CAPros oft txt i Next name the file and select a directory to store the file in In this example we are creating a file ProSoft txt and storing this file on our root C drive After you have done this press the _ button Now you have everything that shows up on the HyperTerminal screen being logged to a file called ProSoft txt This is the file that you will then be able to email to ProSoft Technical Support to assist with issues on the communications network To begin the display of the communications data you will then want to press B to tell the module to start printing the communications traffic out on the debug port of the module After you have pressed
97. menu in HyperTerminal select Receive File This action opens the Receive File dialog box 2 A Ai sore pros B Block Transfer Statistics C Module Configuration D Database View R Receive Module Configuration S Send Module Configuration V Version Information H Harm Boot Module Esc Exit Program Press Y key to confirm configuration send Sending configuration file TRANSFERRING CONFIGURATION FILES FROM ProSoft MODULE TO PC The Ynoden protocol is used to send the file from the module Select the RECEIVE menu option and destination directory Building configuration file image from module Ready to Send Cormected 0 90 07 Ml Receive File Place received file in the following folder Use receiving protocol Ymodem v Receive Close Cancel Note ProSoft Technology suggests that you upload the configuration file pre loaded on your module However configuration files are also available on the ProSoft CD as well as the ProSoft Technology web site at www prosoft technology com 6 Select Ymodem as the receiving protocol 7 Click the Receive button This action opens the Zmodem File Receive dialog box showing the progress of your file transfer Ee EM wew Gi aste Ho D 3057 Display Menu AAA A Data Analyzer Recewg PLEGS Songa COMMIILECS Eru checking CRE Fewer K W Harm Boot Mo tas p EL Esc Exit Progr Press Y key tol Sending configur TRANSFERRING CONN The Ynoden protod
98. mmand in the command queue The response message sent from the module to the processor is as follows ProSoft Technology Inc Page 79 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Block Response from Module to Processor Word Offset Description 0 This word contains the block 2001 to 2006 requested by the processor 1 This word contains the next read request block identification code 2 This word contains the number of commands in the block placed in the command queue 3 Not used 4 Not used 5 Not used 6 Not used The ladder logic can examine word 2 of the input image to determine the number of commands placed in the command queue Any errors associated with the command can be viewed in the command list error table Transferring the Command Error List to the Processor You can transfer the command error list to the processor from the module database To place the table in the database set the Command Error Pointer parameter to the database location desired To transfer this table to the processor make sure that the Command Error table is in the database area covered by the Read Data Pass Through Blocks 9956 to 9958 9960 When the port is configured as a slave with pass through Modbus write commands 5 6 and 22 that are addressed to the slave will be passed across the backplane for processing by the ladder
99. mmunications Modbus Communication Module User Manual Section Item Value Range Description Minimum 0 to This parameter specifies the number of milliseconds to wait Command Delay 65535 between issuing each command This delay value is not applied to retries Command Error 1 to 3995 This parameter sets the address in the internal Modbus Pointer database where the command error data will be placed If the value is set to 1 the data will not be transferred to the database Response 0 to This parameter represents the message response timeout Timeout 65535 period in 1 ms increments This is the time that a port configured as a master will wait before re transmitting a command if no response is received from the addressed slave The value is set depending upon the communication network used and the expected response time of the slowest device on the network Retry Count 0 to 10 This parameter specifies the number of times a command will be retried if it fails Error Delay 0 to This parameter specifies the number of polls to skip on the Count 65535 slave before trying to re establish communications After the slave fails to respond the master will skip commands to be sent to the slave the number of times entered in this parameter Modbus Slave aes Configuration header for Modbus slave Internal Slave ID 0 to 255 This parameter defines the virtual Modbus slave address for the internal databas
100. necting from the Config Debug port please press S to stop the data analyzer and then press M to return to the main menu This action will allow the module to resume its normal high speed operating mode Analyzing Data for the first application port Press 1 to display I O data for the first application port in the Data Analyzer The following illustration shows an example of the Data Analyzer output TS a fy G m of ARN j EN p EEE Fe SES me e y PE j ee T TES lt 7D gt lt 037 lt 7E gt lt 16 gt 11 _ lt R gt 11__11__17_ TT _ TT TES 7CONTCOATIGS 1128 TOD TLZDILO1 11871 10311668014 11271164 1 9P11461_11_ lt R 105 lt EA5 lt 03545b gt 165 gt _11_ lt R 5 gt 18_169 ida 10411 168 088383 JC1EJ 9 1118511831188 10641090 190 1C630 F T_T TMB 119711841164 tai 16 _TT_ Re 4054748754 73446 gt _PP_CR 5_PT__PP_ 6O ICHAT BA 1168 1189 1160 112D 10041 TI_IMA BLOF JAI 14 312731094 11099 1116 T_1T_I RIO DOES 169 ITCR ITATT TT_ MLB 8 C09 13 TCI 46 EREI TT_CES IMAAN AGREDIDO MAG BB 277 lt 893 E49 lt 165 gt 7 1_ lt R gt EST 171718117011 111111 IIIT 1T_ E SRE ES y es y A yg A A A A AA A yi ES my yi A a jS TIT TT IT TT RC 18 5B gt lt 83 9 5 gt lt 16 gt _TT_ lt R gt 68 1188 1189 168 1188 11031 E20 61 JCA 1 631 08 1911271198 11FA1 16 1 11 fiesta DECIR ett _ lt R gt _TT_ 1103 109 3003 JOG 6 JSR TT lt 68 FCMA gt lt BKB P lt DS C3 FC ADCO 3 lt 06 HCAS CORK T 400 119 lt 16 gt TT_ lt ROCESI_ 1121777171111 __11 1111 11_18_11_17__1
101. ng Block Transfer Statistics 49 Viewing Data in ASCII Text Format 54 59 Viewing Data in Decimal Format 59 Viewing Data in Floating Point Format 59 Viewing Data in Hexadecimal Format 54 59 Viewing Modbus Configuration 49 Viewing Port Communication Status 51 Viewing Port Configuration 51 Viewing Register Pages 58 Viewing the Next 50 Commands 52 Viewing the Next Page of Commands 52 Viewing the Next Page of Registers 58 Viewing the Previous 50 Commands 52 Viewing the Previous Page of Commands 51 52 Viewing the Previous Page of Registers 58 Viewing the Slave Status List 49 Viewing Version Information 50 Virtual Modbus Database Concepts 73 Ww Warm Boot Block 9998 81 Warm Booting the Module 50 Warnings 3 What Is Covered By This Warranty 103 105 What Is Not Covered By This Warranty 104 Wiring the Power Connections 17 Write Floats to Slave Device 29 Write to Enron Daniel Floats 31 Y Your Feedback Please 2 Page 108 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Error No text of specified style in document Support Service 4 Warranty Serial Communications Modbus Communication Module User Manual ProSoft Technology Inc Page 109 of 109 March 29 2011
102. nt value ProSoft Technology Inc Page 25 of 109 March 29 2011 Configuration MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module Read Floating Point Data Here is the addressing of a Slave device with a parameter Energy Consumption that is shown as two registers 40257 and 40258 Value Description Type 40257 KWH Energy Consumption Float lower 16 bits 40258 KWH Energy Consumption Float upper 16 bits To issue a Read command to this parameter use the following configuration Parameter Value Description Enable 1 Sends the command every time through the command list IntAddress 1000 Places data at address 1000 of the module memory Based on the configuration in ModDef this will put the data at the tag MCM DATA READDATA O Polllnt 0 No delay for this command Count 2 Reads 2 consecutive registers from the Slave device These 2 Modbus registers will make up the Energy Consumption floating point value Swap 0 Swap Code Description 0 None No Change is made in the byte ordering 1234 1234 1 Words The words are swapped 1234 341 2 2 Words amp Bytes The words are swapped then the bytes in each word are swapped 1234 4321 3 Bytes The bytes in each word are swapped 1234 2143 Node 1 Sends the command to Node 1 Func 3 Issues a Modbus Function Code 3 to Read Holding registers DevAddress 256 Along with the Fun
103. o 2 the command will execute only if the internal data associated with the command changes This value is valid only for write commands If the parameter is set to 3 it will function in the same manner as an enable code of 1except that the floating point is disabled for this command A parameter value of 4 is the same as a parameter value of 2 but with floating point handling disabled for the command ProSoft Technology Inc Page 35 of 109 March 29 2011 Configuration MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module 3 6 2 Internal Address This field specifies the virtual Modbus database register to be associated with the command If the command is a read function the data read from the slave device will be placed starting at the register value entered in this field If the command is a write function the data written to the slave device will be sourced from the address specified Register addresses specified for commands must reside in the range specified by the Maximum Register parameter under the MODBUS MASTER section 3 6 3 Poll Interval Time This parameter specifies the minimum interval to execute continuous commands Enable code of 1 The parameter is entered in units of seconds Therefore if a value of 10 is entered for a command the command will execute no more frequently than every 10 seconds 3 6 4 Count This parameter specifies the number of registers or digital points
104. o 32767 This parameter defines the first register of floating point data All requests with register values greater than or equal to this value will be considered floating point data requests This parameter is only used in the Float Flag is enabled For example if a value of 7000 is entered all requests for registers 7000 and above are considered as floating point data Float Offset 0 to 3995 This parameter defines the start register for floating point data in the internal database This parameter is only used if the Float Flag is enabled For example if the Float Offset value is set to 3000 and the Float Start parameter is set to 7000 data requests for register 7000 will use the internal Modbus register 3000 Protocol Oor1 This parameter specifies the Modbus protocol to be used on the port Valid protocols are 0 Modbus RTU and 1 Modbus ASCII Baud Rate 110 to 115K This is the baud rate to be used on the port Enter the baud rate as a value For example to select 19K baud enter 19200 Valid entry for this field include 110 150 300 600 1200 2400 4800 9600 19200 28800 38400 57600 and 115 None Odd or Even Parity This is the parity setting for the port Data Bits 5o0r8 This parameter sets the number of data bits for each word used by the protocol Stop Bits 1or2 This parameter sets the number of stop bits for each data value sent RTS On 0 to 65535 This param
105. odbus slave devices you must construct a command list The commands in the list specify the Modbus slave device to be utilized the function to be performed read or write the data area in the device to interface with and the position in the virtual Modbus database to be associated with the device data Up to 100 commands can be entered for this purpose The list is processed from top command 0 to bottom A poll interval parameter is associated with each command to specify a minimum delay time in seconds between the issuance of a command If the user specifies a value of 10 for the parameter the command will be executed no more frequently than every 10 seconds Additionally a user specified time delay could be inserted between the issuance of each command This is useful for slow responding slave devices Write commands have a special feature as they can be set to execute only if the data in the write command changes If the data in the command has not changed since the command was last issued the command will not be executed If the data in the command has changed since the command was last issued the command will be executed Use of this feature can lighten the load on the Modbus network In order to implement this feature set the enable code for the command to a value of 2 Page 82 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual
106. odule with its alignment bar 5 aligned with the groove 6 on the Base 5 Press firmly and evenly to seat the Module in the Base The Module is seated when the latch 7 on the Base is locked into the Module ProSoft Technology Inc Page 15 of 109 March 29 2011 Hardware Installation MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 2 5 Installing the Serial Adapter Cables Two identical serial adapter cables are supplied Each cable has a locking type 8 pin Mini DIN plug on one end and a DB 9 male connector on the other end The Mini DIN connector on each cable is inserted into the Mini DIN receptacles marked PRT1 and PRT2 on the Base To install the locking type Mini DIN connector slide the spring loaded sleeve back while inserting the plug into the receptacle on the Base and then release the sleeve when fully seated The locking mechanism prevents the cable from being removed during normal operation To remove the cable slide the sleeve back and remove the plug __ EXTERNAL f POWER CONNECTOR PRT2 PRTI Page 16 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Hardware Installation Serial Communications Modbus Communication Module User Manual 2 6 Wiring the Power Connections External power is supplied to the Base on the 2 pin screw terminal block The power supply can be either 24Vdc or 12Vdc and should be located in close p
107. of the controller s input registers at addresses 3xxxx These locations receive their values from devices connected to the I O structure and can only be referenced not altered from within the controller The addressing allows up to 125 registers to be obtained at each request however the specific Slave device may have restrictions that lower this maximum quantity The registers are numbered for zero 30001 zero 30002 one and so on Broadcast mode is not allowed The example below requests the contents of register 3009 in Slave number 11 Adr Func Data Start Reg Hi Data Start Reg Lo Data of Regs Hi Data of Regs Lo Error Check Field 11 04 00 08 00 01 CRC ProSoft Technology Inc Page 87 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Response The addressed Slave responds with its address and the function code followed by the information field The information field contains 1 byte describing the quantity of data bytes to be returned The contents of the registers requested DATA are 2 bytes each with the binary content right justified within each pair of characters The first byte includes the high order bits and the second the low order bits Because the Slave interface is normally serviced at the end of the controller s scan the data will reflect the register content at the end of the scan Each PC will limit the quantity of register c
108. onsi mine wagnien 63 The module provides information on diagnostics and troubleshooting in the following forms LED status indicators on the front of the module provide general information on the module s status Status data contained in the module can be viewed through the Configuration Debug port using the troubleshooting and diagnostic capabilities of Microsoft Windows Hyperterminal Status data values can be transferred from the module to processor memory and can be monitored there manually or by customer created logic 4 1 The Configuration Debug Menu The Configuration and Debug menu for this module is arranged as a tree structure with the Main Menu at the top of the tree and one or more sub menus for each menu command The first menu you see when you connect to the module is the Main menu Because this is a text based menu system you enter commands by typing the command letter from your computer keyboard Microsoft Windows HyperTerminal The module does not respond to mouse movements or clicks The command executes as soon as you press the command letter you do not need to press Enter When you type a command letter a new screen will be displayed in the Microsoft Windows HyperTerminal application ProSoft Technology Inc Page 45 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 4 1 1 Navigation All of the s
109. ontents provided each scan thus for large register quantities multiple PC scans will be required and the data provided will be form sequential scans In the example below the register 3009 contains the decimal value 0 Adr Func ByteCount Data Input Reg Hi Data Input Reg Lo Error Check Field 11 04 02 00 00 E9 5 4 6 Force Single Coil Function Code 05 Query This message forces a single coil either ON or OFF Any coil that exists within the controller can be forced to either state ON or OFF However because the controller is actively scanning unless the coil is disabled the controller can also alter the state of the coil Coils are numbered from zero coil 0001 zero coil 0002 one and so on The data value 65 280 FFOO HEX will set the coil ON and the value zero will turn it OFF all other values are illegal and will not affect that coil The use of Slave address 00 Broadcast Mode will force all attached Slaves to modify the desired coil Note Functions 5 6 15 and 16 are the only messages that will be recognized as valid for broadcast The example below is a request to Slave number 11 to turn ON coil 0173 Adr Func Data Coil Hi Data Coil Lo Data On offInd Data Error Check Field 11 05 00 AC FF 00 CRC Page 88 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual Response The normal respons
110. orm for your application then edit the configuration text file Section ltem Value Range Description Module ir Configuration header for Module Module Name Upto80 Name of the module for use on reports Use this parameter to chars identify your module in your system Maximum 1 to 3996 This parameter defines the maximum register in the virtual Register Modbus Database You should size the database for your application leaving room for expansion in the future Requests for registers outside of the range selected will be returned with an error message Error Status Block 1 to 3995 This value represents the relative starting position in the Pointer module s internal Modbus database where the Error Status data will be stored The table can be placed anywhere in the module s data space The content of the Error Status table is updated at the frequency defined in the Error Status Frequency If a value of 1 is set for the parameter the data will not be placed in the database Error Status 0 to This parameter specifies the number of program cycles Frequency 65535 between each update of the Error Status Block data in the module If the parameter is set to a value of 0 the data is never updated BT Read Start 0 to 3995 This parameter specifies the starting register in the internal Register Modbus database to write over the backplane BT Read Register 12 to This parameter specifies the number registers in the internal Count 3996 Modbus
111. other than Loopback Diagnostic Test that will be recognized as valid for broadcast The following example forces 10 coils starting at address 20 18 HEX The two data fields CD 1100 and 00 0000 000 indicate that coils 27 26 23 22 and 20 are to be forced on Adr Func HiAdd_ Lo Quantity Byte Data Coil Status Data Coil Status Error Check Add Cnt 20 to 27 28 to 29 Field 11 OF 00 13 00 OA 02 CD 00 CRC Page 90 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual Response The normal response will be an echo of the Slave address function code starting address and quantity of coils forced Adr Func Hi Addr Lo Addr Quantity Error Check Field 11 OF 00 13 00 OA CRC The writing of coils via Modbus function 15 will be accomplished regardless of whether the addressed coils are disabled or not Coils that are unprogrammed in the controller logic program are not automatically cleared upon power up Thus if such a coil is set ON by function code 15 and even months later an output is connected to that coil the output will be hot 5 4 9 Preset Multiple Registers Function Code 16 Query Holding registers existing within the controller can have their contents changed by this message a maximum of 60 registers However because the controller is actively scanning it also can alter the content of any holding re
112. ous C Suitable for use in Class division 2 Groups A B C and D Hazardous Locations or Non Hazardous Locations MVI94 Markings Electrical Ratings Backplane Current Load 800 mA 5 Vdc Operating Temperature 0 C to 60 C 32 F to 140 F Storage Temperature 40 C to 85 C 40 F to 185 F Shock 30g Operational 50g non operational Vibration 5 g from 10 Hz to 150 Hz Relative Humidity 5 to 95 without condensation All phase conductor sizes must be at least 1 3 mm squared and all earth ground conductors must be at least 4mm squared Label Markings Agency Approvals and Certifications cUL C22 2 No 213 1987 CE Mu MVI94 MCM Flex I O Platform Contents Serial Communications Modbus Communication Module User Manual Contents Your Feedback PledSe sssacssdcleeceyeleteieteteds vebeckencs aaa 2 HOw to GOMtaCt Snr aa anda ti cia 2 ProSoft Technology Product Documentation c cccscssessessesesssssesesssssssesessessessessessessessesaesseeeteaeees 2 Important Installation INStrUCTIONS eesi enei reee ienasi an NE EEE cra ran n rar E ERE 3 MVI Multi Vendor Interface Modules ooocccooccccccoocccccnooccccnnnnnccnonnnnconnnnnn cnn nono n cnn nnnnn aeiiaaie 3 WANO S repartida 3 MVI94 MarkiInGS vision 3 1 Quick Start 9 2 Hardware Installation 11 2 1 Verify Package Content oocoocccinccccnocccoonccconccnonncnnannnnonon nono cn nan n cnn nn cnn carr nncann nn nannnnas 12 2 2 Mounting the MVI 94 Flex I O
113. pers on the bottom of the module as shown in this figure NOTE STORE JUMPERS IN THIS POSITION WHEN NOT SELECTED RS485 RS422 RS232 SELECTED SETUP BP RESET DISABLED NOTE RS422 OR RS485 MAY BE SELECTED BY MOVING JUMPER TO APPROPRIATE PINS Port 2 RS 232 422 485 Select with jumper shipped in 232 BP Reset If the MVI94 module is to be reset when the Flex Bus is reset install the BP RESET jumper in the Enabled position ATTENTION Do not remove or replace a base unit when power is applied Interruption of the flexbus can result in unintended operation or machine motion SETUP To place the module in SETUP mode install the jumper in the Selected position DOS default To prevent the module from being in Setup mode leave the jumper in the disabled position Page 14 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Hardware Installation Serial Communications Modbus Communication Module User Manual 2 4 Installing the Module onto the Base 1 Rotate the keyswitch 1 on the Base clockwise to position 1 2 Make certain the flexbus connector 3 on the Base is pushed all the way to the left to connect with the neighboring base or adapter The Module cannot be installed unless the flexbus connector is fully extended 3 Make sure that the pins on the bottom of the Module are straight so they will align properly with the connector socket on the Base 4 Position the M
114. power source Select the directory containing the correct configuration file on the computer Start the terminal emulation program on the computer Press the key on the terminal to verify that the module is communicating with the computer and that the main menu mode is current Press the R key on the terminal emulator to select the receive option Immediately press the Y key Press the ALT F3 key on the terminal emulator and enter name of the configuration file to load into the module 94 MCMM CFG or 94MCMS CFG if using one of the example files The configuration will be downloaded and the module will restart using the new configuration Connect the module s Modbus port to the Modbus network If everything is configured correctly and the cable connections are correct communications should be present on the port Monitor the communication statistics for the port to verify that everything is working correctly View the virtual Modbus database in the module using the terminal emulator Create the ladder logic program for your system An example ladder program is available on the www prosoft technology com web site This logic is responsible for transferring the data between the module and processor Connect the module to the ControlNet network or Flex I O communication adapter If all is configured correctly the data in the module should be visible in the processor Use the Configuration Debug port to view the backplane transfer stat
115. processing a long duration program command The Master should retransmit the message later when the Slave is free 08 Memory Parity Error Specialized use in conjunction with function codes 20 and 21 and reference type 6 to indicate that the extended file area failed to pass a consistency check The Slave attempted to read record file but detected a parity error in the memory The Master can retry the request but service may be required on the Slave device 0a Gateway Path Unavailable Specialized use in conjunction with gateways indicates that the gateway was unable to allocate an internal communication path from the input port to the output port for processing the request Usually means that the gateway is misconfigured or overloaded Ob Gateway Target Device Failed To Respond Specialized use in conjunction with gateways indicates that no response was obtained from the target device Usually means that the device is not present on the network Page 94 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual 5 5 Configuration Form This section contains configuration forms that will aid in the configuration of the module If you design your system before trying to directly implement it you will have a greater chance of success Fill in the configuration f
116. r debugging features If you need these functions you will be advised how to use them by Technical Support Please be careful when pressing keys so that you do not accidentally execute an unwanted command Redisplaying the Menu Press to display the current menu Use this command when you are looking at a screen of data and want to view the menu choices available to you Opening the Data Analyzer Menu Press A to open the Data Analyzer Menu Use this command to view all bytes of data transferred on each port Both the transmitted and received data bytes are displayed Refer to Data Analyzer page 53 for more information about this menu Important When in analyzer mode program execution will slow down Only use this tool during a troubleshooting session Before disconnecting from the Config Debug port please press S to stop the data analyzer and then press M to return to the main menu This action will allow the module to resume its normal high speed operating mode Page 48 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Diagnostics and Troubleshooting Serial Communications Modbus Communication Module User Manual Viewing Block Transfer Statistics Press B from the Main menu to view the Block Transfer Statistics screen Use this command to display the configuration and statistics of the backplane data transfer operations between the module and the processor The information on this screen
117. requires this addressing refer to the following section For standard floating point data handling the following is an example of copying 10 floats to the module First configure a tag within the FLEX processor MCM_Write_Floats REAL 10 Then configure a COP statement within the main routine to copy this tag to the module s MCM DATA WRITEDATA array MCM_Write_Floats 0 CM DATA WriteData 0 The length of the copy statement is determined by the Dest file size To copy 10 floats from the MCM_Write_Floats array to the MCM DATA WRITEDATA array the length of the COP statement must be set to a value of 20 Page 32 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual To copy data from the MVI94 MCM module to a floating point tag within the FLEX processor 1 Configure a tag within the FLEX processor as shown MCM_Read_Floats REAL 10 2 Then configure the COP statement to move data from the MCM DATA READDATA array and over to the new tag MCM_READ_FLOATS tag as shown here Once again the COP statement will take as many of the Source elements required to fill the Dest tag for the length specified Therefore the COP statement will take MCM DATA READDATA O TO 19 to fill the MCM_READ_FLOATS 0 TO 9 Enron Daniel Float Configuration Sometimes it is necessary for the module to emul
118. rk or similar infringement The Buyer assumes all risks including the risk of suit that the product or any use of the product will infringe existing or subsequently issued patents trademarks or copyrights a Any documentation included with Product purchased from ProSoft is protected by copyright and may not be duplicated or reproduced in any form without prior written consent from ProSoft b ProSoft s technical specifications and documentation that are included with the Product are subject to editing and modification without notice c Transfer of title shall not operate to convey to Customer any right to make or have made any Product supplied by ProSoft d Customer is granted no right or license to use any software or other intellectual property in any manner or for any purpose not expressly permitted by any license agreement accompanying such software or other intellectual property e Customer agrees that it shall not and shall not authorize others to copy software provided by ProSoft except as expressly permitted in any license agreement accompanying such software transfer software to a third party separately from the Product modify alter translate decode decompile disassemble reverse engineer or otherwise attempt to derive the source code of the software or create derivative works based on the software export the software or underlying technology in contravention of applicable US and international export laws and regula
119. roximity of the base Connect dc common to the COM terminal Connect 24V dc or 12V dc to the 24VDC terminal ProSoft Technology Inc Page 17 of 109 March 29 2011 Hardware Installation MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Page 18 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual 3 Configuration In This Chapter ed e a DE 20 o ROO 21 se Modbus Master t cdorcaia titanio AT 23 2 Modbus Slave disini R 24 Floating Point Data Handling Modbus Master 25 2 Commands r az e is 35 Uploading and Downloading the Configuration Fil8 ooonnnnnnnnnnnic 38 ProSoft Technology Inc Page 19 of 109 March 29 2011 Configuration User Manual MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module 3 1 Module Section Item Value Range Description Module Configuration header for Module Module Name Up to 80 chars Name of the module to use on reports Use this parameter to identify your module in your system Maximum Register 1 to 3996 This parameter defines the maximum register in the virtual Modbus database You should size the database for your application leaving room for expansion in the future Requests for registers outside of the range selected
120. rrogated to obtain status data The addressing allows up to 2000 inputs to be obtained at each request however the specific Slave device may have restrictions that lower the maximum quantity The inputs are numbered form zero input 10001 zero input 10002 one input 10003 two and so on for a 584 The following table is a sample read input status request to read inputs 10197 to 10218 from Slave number 11 Adr Func DataStartPtHi Data Start PtLo Data of Pts Hi Data Hof Pts Lo Error Check Field 11 02 00 C4 00 16 CRC ProSoft Technology Inc Page 85 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Response An example response to Read Input Status is as shown in Figure C4 The data is packed one bit for each input The response includes the Slave address function code quantity of data characters the data characters and error checking Data will be packed with one bit for each input 1 ON O OFF The lower order bit of the first character contains the addressed input and the remainder follow For input quantities that are not even multiples of eight the last characters will be filled in with zeros at high order end The quantity of data characters is always specified as a quantity of RTU characters that is the number is the same whether RTU or ASCII is used Because the Slave interface device is serviced at the end of a controller s
121. rstands it and is bound by its Terms 6 2 10 Controlling Law and Severability This Warranty shall be governed by and construed in accordance with the laws of the United States and the domestic laws of the State of California without reference to its conflicts of law provisions If for any reason a court of competent jurisdiction finds any provisions of this Warranty or a portion thereof to be unenforceable that provision shall be enforced to the maximum extent permissible and the remainder of this Warranty shall remain in full force and effect Any cause of action with respect to the Product or Services must be instituted in a court of competent jurisdiction in the State of California Page 106 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module Index User Manual Index Commands 35 Modbus Master 23 Modbus Slave 24 Module 20 Port 21 A About the MODBUS Protocol 73 Allocation of Risks 106 Analyzing Data for the first application port 53 Analyzing Data for the second application port 53 Cc Cable Connections 68 Cold Boot Block 9999 81 Cold Booting the Module 51 Command Blocks 2001 to 2006 79 Command Error List 61 Commands Supported by the Module 83 Configuration 19 Configuration Form 95 Contacting Technical Support 99 101 Controlling Law and Severability e 106 Count 36 D
122. rtual UART systems USB to serial port adapters often do not function reliably especially during binary file transfers such as when uploading downloading configuration files or module firmware upgrades 3 7 2 Required Software In order to send and receive data over the serial port COM port on your computer to the module you must use a communication program terminal emulator A simple communication program called HyperTerminal is pre installed with recent versions of Microsoft Windows operating systems If you are connecting from a machine running DOS you must obtain and install a compatible communication program The following table lists communication programs that have been tested by ProSoft Technology DOS ProComm as well as several other terminal emulation programs Windows 3 1 Terminal Windows 95 98 HyperTerminal Windows NT 2000 XP HyperTerminal The module uses the Ymodem file transfer protocol to send and receive configuration files from your module If you use a communication program that is not on the list above please be sure that it supports Ymodem file transfers Page 38 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Configuration Serial Communications Modbus Communication Module User Manual 3 7 3 Transferring the Configuration File to Your PC 1 Connect your PC to the Configuration Debug port of the module using a terminal program such as HyperTerminal Press
123. s or services downtime the claims of third parties including customers of the Purchaser and injury to property Some areas do not allow time limitations on an implied warranty or allow the exclusion or limitation of incidental or consequential damages In such areas the above limitations may not apply This Warranty gives you specific legal rights and you may also have other rights which vary from place to place 6 2 7 Time Limit for Bringing Suit Any action for breach of warranty must be commenced within 39 months following shipment of the Product 6 2 8 No Other Warranties Unless modified in writing and signed by both parties this Warranty is understood to be the complete and exclusive agreement between the parties suspending all oral or written prior agreements and all other communications between the parties relating to the subject matter of this Warranty including statements made by salesperson No employee of ProSoft or any other party is authorized to make any warranty in addition to those made in this Warranty The Customer is warned therefore to check this Warranty carefully to see that it correctly reflects those terms that are important to the Customer 6 2 9 Allocation of Risks This Warranty allocates the risk of product failure between ProSoft and the Customer This allocation is recognized by both parties and is reflected in the price of the goods The Customer acknowledges that it has read this Warranty unde
124. s Modbus Communication Module Modbus Error Codes These error codes are returned to the module from Modbus slave devices attached to the master port These codes are the standard Modbus errors The error codes are listed in the following table Code Description Illegal Function Illegal Data Address Illegal Data Value Failure in Associated Device Acknowledge O NO A JO D Busy Rejected Message Module Error Codes Module error codes are generated by the module s program These errors can result due to configuration or communication problems These errors are stored in the Modbus master command list error table A word is allocated for each command in the memory area Code Description 1 CTS modem control line not set before transmit 2 Timeout while transmitting message 11 Timeout waiting for response after request 253 Incorrect slave address in response 254 Incorrect function code in response 255 Invalid CRC LRC value in response The following table lists the errors returned by the module for errors found when parsing the command list Code Description 41 Invalid enable code 42 Internal address gt maximum address 43 Invalid node address lt 0 or gt 255 44 Count parameter set to 0 45 Invalid function code 46 All parameters set to 0 47 All parameters set to 1 Use the error codes returned for each command in th
125. s master port Commands selected for execution need not have the Enable Code set 1 or 2 but must be valid commands The format for this block is shown in the following table Block Request from Processor to Module Word Offset Description 0 Command queue block identification code of 2001 to 2006 1 This word contains the index in the command list for the first command to be entered into the command queue 2 This word contains the index in the command list for the second command to be entered into the command queue 3 This word contains the index in the command list for the third command to be entered into the command queue 4 This word contains the index in the command list for the fourth command to be entered into the command queue 5 This word contains the index in the command list for the fifth command to be entered into the command queue 6 This word contains the index in the command list for the sixth command to be entered into the command queue When the module receives one of these blocks it examines word 0 of the output image This word defines the number of commands contained in the block The command count is determined by subtracting 2000 from the word value This permits the controller to set from one to six commands into the command queue The indexes submitted in the block should be valid for the command list After the module determines the number of commands to consider it inserts each co
126. scan data will reflect input status at the end of the scan Some Slaves will limit the quantity of inputs provided each scan thus for large coil quantities multiple PC transactions must be made using coil status for sequential scans Adr Func Byte Data Discrete Input Data Discrete Input Data Discrete Input Error Check Field Count 10197 to 10204 10205 to 10212 10213 to 10218 11 02 03 AC DB 35 CRC The status of inputs 10197 to 10204 is shown as AC HEX 10101 1100 binary Reading left to right this show that inputs 10204 10202 and 10199 are all on The other input data bytes are decoded similar Due to the quantity of input statuses requested the last data field which is shown as 35 HEX 0011 0101 binary contains the status of only 6 inputs 10213 to 102180 instead of 8 inputs The two left most bits are provided as zeros to fill the 8 bit format 5 4 4 Read Holding Registers Function Code 03 Query Read Holding Registers 03 allows the user to obtain the binary contents of holding registers 4xxxx in the addressed Slave The registers can store the numerical values of associated timers and counters which can be driven to external devices The addressing allows up to 125 registers to obtained at each request however the specific Slave device may have restriction that lower this maximum quantity The registers are numbered form zero 40001 zero 40002 one and so on The broadcast mode is not allowed The ex
127. so need information regarding Module configuration and associated ladder files if any Module operation and any unusual behavior Configuration Debug status information LED patterns Details about the serial Ethernet or fieldbus devices interfaced to the module if any akhON Note For technical support calls within the United States an after hours answering system allows 24 hour 7 days a week pager access to one of our qualified Technical and or Application Support Engineers Detailed contact information for all our worldwide locations is available on the following page ProSoft Technology Inc Page 99 of 109 March 29 2011 Support Service amp Warranty MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Internet Web Site www prosoft technology com support E mail address support prosoft technology com Asia Pacific Tel 603 7724 2080 E mail asiapc prosoft technology com location in Malaysia Languages spoken include Chinese English Asia Pacific Tel 86 21 5187 7337 x888 E mail asiapc prosoft technology com location in China Languages spoken include Chinese English Europe Tel 33 0 5 34 36 87 20 location in Toulouse France E mail support EMEA prosoft technology com Languages spoken include French English Europe location in Dubai UAE Tel 971 4 214 6911 E mail mea prosoft technology com Languages spoken include English H
128. t an address in the range of 1 to 247 so be careful If the value is set to zero the command will be a broadcast message on the network The Modbus protocol permits broadcast commands for write operations Do not use this node address for read operations 3 6 7 Function Code This parameter specifies the Modbus function to be executed by the command These function codes are defined in the Modbus protocol The following table defines the purpose of each function supported by the module Func Description Read Coil Status Read Input Status Read Holding Registers Read Input Registers Single Coil Write Single Register Write 15 Multiple Coil Write 16 Multiple Register Write DOD N A O DND 3 6 8 Device MODBUS Address This parameter specifies the starting Modbus register or digital point address to be considered by the command in the Modbus slave device Refer to the documentation of each Modbus slave device on the network for their register and digital point address assignments The FC determines the addresses range and that this value will be the register or bit OFFSET into a given data range For example if the command is to be a bit command FC 1 2 5 or 15 to Read Write a Coil OX address 00001 then the value to enter here would be 0 For Coil address 00110 the value here would be 109 For register Read Write commands FC 3 4 6 or 16 in the 3X FC4 or 4X FC3 say 30001 or 40001 th
129. tance ProSoft Technology Inc Page 47 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM s Flex I O Platform User Manual Serial Communications Modbus Communication Module 4 3 Module Configuration 4 3 1 Main Menu When you first connect to the module from your computer your terminal screen will be blank To activate the main menu press the key on your computer s keyboard If the module is connected properly the following menu will appear MODBUS MASTER SLAVE COMMUNICATION MODULE lt MUI94 HCH gt MENU 7 Display Menu A Data Analyzer B Backplane Transfer Statistics C Module Configuration D Modbus Database View E Master Command Errors L Master Command List O Slave Status List R Receive Configuration from Remote Send Configuration to Remote U lersion Information W Warm Boot Module 1 Communication Status 6 Port Configuration Esc Cold Boot Module Caution Some of the commands available to you from this menu are designed for advanced debugging and system testing only and can cause the module to stop communicating with the processor or with other devices resulting in potential data loss or other communication failures Use these commands only if you fully understand their potential effects or if you are specifically directed to do so by ProSoft Technology Technical Support Engineers There may be some special command keys that are not listed on the menu but that may activate additional diagnostic o
130. the command list Refer to the Commands section of the documentation for more information When the module receives a block 1000 to 1255 it will check the command queue for an available position If there is space in the command queue the module will construct a command and place it in the queue The module will respond with the following block in the input image after processing request Page 78 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Reference Serial Communications Modbus Communication Module User Manual Block Response from Module to Processor Word Offset Description 0 This word contains the block 1000 to 1255 requested by the processor 1 This word contains the next read request block identification code 2 This word contains the result of the event request If a value of one is present the command was issued If a value of zero is present no room was found in the command queue Not used Not used Not used oJ AJ Not used The ladder logic can examine word 2 of the input image to determine if the module was able to execute the command If invalid parameters are set in the event request block the command may still be placed in the queue and there will be no error indication Command Blocks 2001 to 2006 These control blocks are sent from the processor to the module to execute one or more commands in the module s command list out the Modbu
131. tions or use the software other than as authorized in connection with use of Product f Additional Restrictions Relating To Software And Other Intellectual Property In addition to compliance with the Terms of this Warranty Customers purchasing software or other intellectual property shall comply with any license agreement accompanying such software or other intellectual property Failure to do so may void this Warranty with respect to such software and or other intellectual property 6 2 5 Disclaimer of all Other Warranties The Warranty set forth in What Is Covered By This Warranty page 103 are in lieu of all other warranties express or implied including but not limited to the implied warranties of merchantability and fitness for a particular purpose ProSoft Technology Inc Page 105 of 109 March 29 2011 Support Service amp Warranty MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 6 2 6 Limitation of Remedies In no event will ProSoft or its Dealer be liable for any special incidental or consequential damages based on breach of warranty breach of contract negligence strict tort or any other legal theory Damages that ProSoft or its Dealer will not be responsible for include but are not limited to Loss of profits loss of savings or revenue loss of use of the product or any associated equipment loss of data cost of capital cost of any substitute equipment facilitie
132. to consider from the read operations over the backplane This parameter computes the number of blocks to transfer from the backplane to the module The number of blocks must be gt 2 for proper backplane data transfer Backplane Fail Count 0 to 65535 This parameter specifies the number of consecutive backplane transfer failure before communications is disabled If the parameter is set to a value of 0 communications is not disabled Page 20 of 109 ProSoft Technology Inc March 29 2011 MVI94 MCM Flex I O Platform Serial Communications Modbus Communication Module Configuration User Manual 3 2 Port The PORT section of the configuration file sets the Modbus port communication parameters The following table lists the parameters defined in this section Section Item Value Range Description PORT Configuration header for communication port Type 0 1 3 4 This parameter specifies if the port will emulate a Modbus master device 0 a Modbus slave device without pass through 1 a Modbus slave device with pass through and data swapping 3 or a Modbus slave device with pass through 4 Float Flag Yes or No This flag specifies if the floating point data access functionality is to be implemented If the float flag is set to Yes Modbus functions 3 6 and 16 will interpret floating point values for registers as specified by the following two parameters Float Start 0 t
133. ts equipment options parts software or user created programming including but not limited to programs developed with any IEC 61131 3 C or any variant of C programming languages not furnished by ProSoft v use of the Product for purposes other than those for which it was designed vi any other abuse misapplication neglect or misuse by the Customer vii accident improper testing or causes external to the Product such as but not limited to exposure to extremes of temperature or humidity power failure or power surges or viii disasters such as fire flood earthquake wind and lightning c The information in this Agreement is subject to change without notice ProSoft shall not be liable for technical or editorial errors or omissions made herein nor for incidental or consequential damages resulting from the furnishing performance or use of this material The user guide included with your original product purchase from ProSoft contains information protected by copyright No part of the guide may be duplicated or reproduced in any form without prior written consent from ProSoft 6 2 3 Disclaimer Regarding High Risk Activities Product manufactured or supplied by ProSoft is not fault tolerant and is not designed manufactured or intended for use in hazardous environments requiring fail safe performance including and without limitation the operation of nuclear facilities aircraft navigation of communication systems air traff
134. ubmenus for this module contain commands to redisplay the menu or return to the previous menu You can always return from a submenu to the next higher menu by pressing M on your keyboard The organization of the menu structure is represented in simplified form in the following illustration Main Menu Child Menu A Child Sub Menu 1 Child Sub Menu 2 Child Sub Menu 3 Child Menu B Child Sub Menu 1 Child Menu C Child Sub Menu 1 Child Sub Menu 2 The remainder of this section shows the menus available for this module and briefly discusses the commands available to you 4 1 2 Keystrokes The keyboard commands on these menus are usually not case sensitive You can enter most commands in lowercase or uppercase letters The menus use a few special characters that must be entered exactly as shown Some of these characters will require you to use the SHIFT CTRL or ALT keys to enter them correctly For example on US English keyboards enter the command as SHIFT and Also take care to distinguish the different uses for uppercase letter eye I lowercase letter el L and the number one 1 Likewise uppercase letter oh O and the number zero 0 are not interchangeable Although these characters look alike on the screen they perform different actions on the module and may not be used interchangeably Page 46 of 109 ProSoft Technology Inc March 29 2011
135. ule s flash memory to configure the module 4 3 2 Master Command Error List Menu Use this menu to view the command error list for the module Press to view a list of commands available on this menu E Main Menu l Protocol Menu Command List Menu Redisplays refeshes this menu Redisplays last selected page ofdata Goes back one page of data Goes forward one page of data Goes up one level to main menu Redisplaying the Current Page Press S to display the current page of data Moving Back Through 5 Pages of Commands Press to display data for last 5 page commands Viewing the Previous Page of Commands Press P to display the previous page of commands Moving Forward Skipping Through 5 Pages of Commands Press to display data for the next page of commands ProSoft Technology Inc Page 51 of 109 March 29 2011 Diagnostics and Troubleshooting MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module Viewing the Next Page of Commands Press N to display the next page of commands Returning to the Main Menu Press M to return to the Main menu 4 3 3 Master Command List Menu Use this menu to view the command list for the module Press to view a list of commands available on this menu M Main Menu Protocol Menu Redisplays last selected page ofdata Goes back one
136. vely issues Modbus commands to other nodes on the Modbus network The Master ports have an optimized polling characteristic that polls slaves with communication problems less frequently Command List Up to 100 commands per Master port each fully configurable for function slave address register to from addressing and word bit count Polling of Command Configurable polling of command list including continuous List and on change of data and dynamically user or automatic enabled Status Data Error codes available on an individual command basis In addition a slave status list is maintained per active Modbus Master port Modbus Slave A port configured as a Modbus slave permits a remote Master to interact with all data contained in the module This data can be derived from other Modbus slave devices on the network through a Master port or from the module Node Address 1 to 247 software selectable Status Data Error codes counters and port status available per configured slave port ProSoft Technology Inc Page 67 of 109 March 29 2011 Reference MVI94 MCM Flex I O Platform User Manual Serial Communications Modbus Communication Module 5 2 Cable Connections The application ports on the MVI94 MCM module support RS 232 RS 422 and RS 485 interfaces Please ensure that the jumpers are set correctly for the type of interface you are using Note for modules with RS 232 connection to a radio or mod

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