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IOT2050 Connecting to MODBUS TCP (Options)

Created by: antsals82 at: 4/28/2021 10:01 AM (7 Replies)

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4/28/2021 10:01 AM	Rate (0)
antsals82 Member Joined: 10/11/2020 Last visit: 7/9/2024 Posts: 37 Rating: (0)	Morning all, I have an IOT2050 device and now have a use for it I am after connecting it to a system to capture / push data from using MODBUS tcp protocol. Recognise I could use Node Red.....but have been unsuccessful in the past, what other options do I have? Regards, Ant

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4/28/2021 11:03 AM	Rate (0)
bergmanu Platinum Member Joined: 4/28/2015 Last visit: 11/12/2024 Posts: 3345 Rating: (382)	Hi, What was your problem with Modbus on node-red? For me this works fine. you could try to use the python Modbus module. Another option would be to use C/C++ with libmodbus. Therefor you would need to use our SDK for cross-compiling. Best regards!
	Not working for IOT2050 support anymore from March 1st, 2024. I really enjoyed the time supporting you! :)
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4/28/2021 5:36 PM	Rate (0)
kpkumajaya Regular Member Joined: 2/24/2018 Last visit: 2/16/2023 Posts: 24 Rating: (0)	Accessing Schneider PM800 and Siemens PAC3200 via Modbus TCP and simultaneously push value to our automation system via Modbus RTU RS-485 on Node-RED without problem here.

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4/28/2021 9:22 PM	Rate (0)
antsals82 Member Joined: 10/11/2020 Last visit: 7/9/2024 Posts: 37 Rating: (0)	Thanks for the responses; which MODBUS node did you use on node red? This might be the problem there are so many options. Regards, Ant

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4/28/2021 11:37 PM	Rate (0)
kpkumajaya Regular Member Joined: 2/24/2018 Last visit: 2/16/2023 Posts: 24 Rating: (0)	node-red-contrib-modbus. Let me know if you need a working example flow.

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4/29/2021 9:27 AM	Rate (0)
antsals82 Member Joined: 10/11/2020 Last visit: 7/9/2024 Posts: 37 Rating: (0)	Thanks again; an example flow would be brilliant. Also probably my lack of MODBUS knowledge; is there a slave simulator I could setup on my PC that I can run and connect to with noder red to prove connectivity etc.

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4/29/2021 2:16 PM	Rate (0)
kpkumajaya Regular Member Joined: 2/24/2018 Last visit: 2/16/2023 Posts: 24 Rating: (0)	A working example: https://gist.github.com/kumajaya/701fe6363fbb082b903f6770a4142ee3 For slave simulator, you can try Diagslave: https://www.modbusdriver.com/diagslave.html
	Last edited by: kpkumajaya at: 04/29/2021 14:28:46
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4/30/2021 11:23 AM	Rate (0)
faschmidt Experienced Member Joined: 4/17/2018 Last visit: 1/13/2025 Posts: 88 Rating: (5)	Find included two sample flows using the node-red-contrib-modbus library. The sample connects to an S7-1500 CPU running as Modbus TCP server. The ANxx sample shows some more code as examples. As always: No warranty given Attachment sample_modbus_client_s7_helperFunctions_flow.zip (670 Downloads)

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