7/26/2014 1:11 PM | |
Joined: 9/27/2006 Last visit: 10/11/2024 Posts: 12287 Rating: (2685) |
Hello Damayanti; As always, documentation and samples are available through Product Suppport and the forum pages - simply use the search box at the right of this page. You would have found these links, amongst others: SIMATIC ET 200S Serial interface modules Sample et200s 1si Modbus master. Hope this helps, Daniel Chartier |
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7/26/2014 7:21 PM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Hello Damayanti dchartierhas pointed you in the right direction. Pl go through the details in the links provided by him. In case you have any specific issue, please do post here for help. Here are some more threads on Modbus, which will help you: Modbus General Description Modbus Sample Project Hope this helps Cheers Navnag |
There is no such thing as the last bug in a program |
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8/1/2014 8:12 AM | |
Joined: 10/17/2011 Last visit: 7/19/2022 Posts: 148 Rating: (3) |
Dear All, I want to communicate SINAMICS V20 Drive with IM151-8 PN/DP using modbus module, 6ES7 138-4DF11-0AB0 I have attached document which includes: system manual page for Modbus write insruction (PLC as well as V20 Drive) hardware configuration details program for writing the holding registers and PLC program At V20 Drive side , I have parameterised it for modbus communication. Still when I send pulse at send request, done bit of send and receive becomes high but motor doesn't run. please help. Warm regards, Damayanti Bhapkar
Attachmentmodbus_v20_doc.zip (296 Downloads) |
8/1/2014 8:19 AM | |
Joined: 10/17/2011 Last visit: 7/19/2022 Posts: 148 Rating: (3) |
plz find program attached. Damayanti
AttachmentModbus_V20.zip (315 Downloads) |
8/2/2014 8:09 AM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
HelloDamayanti Here is how you should troubleshoot your communication : a) Use a Modbus Simulator software like Modscan / MBpoll with a Serial to RS485 convertor to first test Modbus Communication with your V20 drive. b) Confirm the Modbus Commands / Settings that you need for Controlling the drive using the Modbus Simulator as a Modbus Master and V20 drive as a slave. c) Check that you have implemented the same settings ( Baud Rate / Parity etc and Register addresses in your S7 program. d) Connect the Modbus Simulator as Modbus Slave to the 1SI Module as Modbus Master. Check if the correct Msg frames are being received from the PLC. If needed check and correct your program. e) Finally you can connect your drive to the PLC with the RS485 convertor in parallel. Monitor the communication with a serial port monitor software like "Docklight" . This way you can identify the issues in communication and solve them. Hope this helps Cheers Navnag
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There is no such thing as the last bug in a program |
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8/8/2014 1:35 PM | |
Joined: 9/1/2005 Last visit: 10/9/2024 Posts: 4109 Rating: (195) |
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8/9/2014 9:14 AM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
HelloDamayanti The following sample programs for Modbus RTU communication with V20 drive will help you. Although these are for S7-1200 or S7-200, but they demonstrate the structure of Modbus communication telegrams for V20 drive Hope this helps Cheers Navnag |
There is no such thing as the last bug in a program |
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