Schneider Electric LUFP7 User Manual

User's manualRetain for future useAltivar 71Modbus/Uni-Telway cardModbus protocolVW3 A3 303

105. Connecting to the bus5. 3. Connection via RJ45 wiring systemb Connection accessoriesb Connection cables1. Master (PLC, PC or communication module

115. Connecting to the busb Connection cables for the masterType of master Master interface Description Catalog numberTwido PLC Adaptor or mini-DIN RS

125. Connecting to the bus5. 4. Connection via junction boxesb Connection accessoriesb Connection cables1. Master (PLC, PC or communication module)2.

135. Connecting to the busb Connection cables for the masterType of master Master interface Description Catalog numberTwido PLC Adaptor or screw termi

146. Configuration6. 1. Communication parametersConfigure the following parameters in the [1.9 - COMMUNICATION] (COM-) menu, [Uni-Telway/Modbus] (UtL-

156. Configuration6. 2. Control - CommandNumerous configurations are possible. For more information, refer to the Programming Manual and the Parameter

166. Configurationb Control via Modbus in Drivecom profileThe command and reference come from Modbus.The command is in Drivecom profile.Configure the

176. Configurationb Control in Drivecom profile via Modbus and reference switching at the terminalsThe command comes from Modbus.The command comes eit

186. Configuration6. 3. Communication scannerThe communication scanner enables all the application-relevant parameters to be grouped in 2 consecutive

196. Configuration6. 4. Communication faultsA Modbus fault is triggered if the Modbus card does not receive any Modbus requests at its address within

2Contents1. Before you begin___________________________________________________________________________________________ 32. Documentation structure__

206. Configuration6. 5. Monitored parametersIt is possible to select up to 4 parameters to display their values in the [1.2 - MONITORING] menu ([COMMU

217. Diagnostics7. 1. Checking the addressOn the graphic display terminal or integrated display terminal, check the address that has been coded on the

227. Diagnostics7. 3. Control - CommandOn the graphic display terminal only, the [1.2 - MONITORING] menu ([COMMUNICATION MAP] submenu) can be used to

237. Diagnostics7. 4. Communication scannerOn the graphic display terminal, in the [1.2 - MONITORING] (SUP-) menu ([COMMUNICATION MAP] (CMM-) submenu)

247. Diagnostics7. 5. Communication faultModbus communication faults are indicated by the red ERR LED on the Modbus card.In the factory configuration,

258. Modbus protocol8. 1. PrincipleThe Modbus protocol is a master-slave protocol.Direct slave-to-slave communications are not possible.For slave-to-s

268. Modbus protocol8. 2. Modesb RTU modeThe Modbus RTU frame contains no message header byte, nor end of message bytes. It is defined as follows:The

278. Modbus protocol8. 3. Modbus functions availableThe following table indicates which Modbus functions are managed by the Altivar 71 and specifies t

288. Modbus protocol8. 5. Write Single Register (6)Request and response:Example: Write value 16#000D to logic address word 9001 (16#2329) on slave 2 (

298. Modbus protocol8. 6. Diagnostics (8)Request and response:The counters are unsigned words.Example: Values 16#31 and 16#32 echoed by slave 4Request

31. Before you beginRead and understand these instructions before performing any procedure with this drive.DANGERHAZARDOUS VOLTAGE• Read and understan

308. Modbus protocol8. 7. Get Comm Event Counter (11 = 16#0B)Question:Response:8. 8. Write Multiple Registers (16 = 16#10)Request:Response:Example: Wr

318. Modbus protocol8. 9. Read/Write Multiple Registers (23 = 16#17)Request:Response:Example: This example combines the two examples for functions 3 a

328. Modbus protocol8. 10. Read Device Identification (43 = 16#2B)Request:Response:The total response size given in this example equals 55 bytes.The r

338. Modbus protocolNegative response specifically related to the identification function:Example of positive response:• Address = 2• Manufacturer nam

348. Modbus protocol8. 11. Communication scannerThe communication scanner can be used to enhance application performance. The drive automatically copi

358. Modbus protocolThe link between the drive parameters and the communication scanner variables can be made:- Via the display terminal (see section

368. Modbus protocolThe communication scanner is configured via the display terminal as follows:Output (control):Input (monitoring):Request:Response:C

378. Modbus protocol8. 12. Exception responsesAn exception response is returned by a slave when it is unable to perform the request which is addressed

388. Modbus protocol8. 13. Read non-existent or protected parametersIf a set of parameters is read using a Modbus function, the value returned for non

399. Appendix9. 1. RS485 standardThe RS485 standard (ANSI/TIA/EIA-485-A-1998) allows variants of certain characteristics:• Polarization• Line terminat

42. Documentation structureThe following Altivar 71 technical documents are available on the Telemecanique website (www.telemecanique.com) as well as

409. Appendix9. 2. Modbus 2-wire standard schematicThe standard schematic corresponds to the Modbus specification published in 2002 on www.modbus.org(

419. Appendix9. 3. Modbus 4-wire standard schematic5 VGRGRRpRpRpRpLTLTRXD1TXD1RXD0TXD0LTLT5 VGRSlave 1 Slave nMasterSlave pairMaster pairCommon

429. Appendix9. 4. Uni-Telway schematicThe Uni-Telway bus schematic was used by Telemecanique for older-generation drives and soft starters (ATV58, AT

439. Appendix9. 5. 2-wire Jbus schematicSchematic diagram:Type of trunk cable Cable with 1 shielded twisted pairMaximum length of bus 1,300 m at 19200

449. Appendix9. 6. Creating a Modbus bus using non-standard equipmentb Different scenariosM If the Modbus bus is created using the latest-generation T

459. Appendixb Calculating the polarizationM PrincipleYou must ensure that the equivalent bus resistance is between 162 Ω and 650 Ω.The equivalent bus

469. Appendix9. 7. RS485 schematic for the cardThe RS485 interface on the Modbus card is electrically isolated from the drive.Schematic diagram:The po

2005-05atv71_Modbus_Jbus_EN_V1

53. Introduction3. 1. PresentationThe communication card (catalog number VW3 A8 303) is used to connect an Altivar 71 drive to a Uni-Telway or Modbus

64. Hardware setup4. 1. ReceiptCheck that the card catalog number marked on the label is the same as that on the delivery note corresponding to the pu

74. Hardware setup4. 4. Switch codingb Choosing polarizationNormal setting for a Modbus bus:• No polarization at drive levelSpecial setting (see "

84. Hardware setupThe table below indicates the positions of the 8 switches for all configurable addresses:Note: Address 0 is not valid.Address Switch

95. Connecting to the bus5. 1. Wiring recommendations• Use Telemecanique-approved cables and wiring accessories to ensure good transmission quality (m