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I have valid modbus tcp traffic but mbtcp filter does not show it

Hi, I am fairly new to WS.

I installed the latest version and have generated some modbus TCP traffic between a PLC and a simulator (node red). I can see the TCP packets and the corresponding IP´s and the 502 port used in the messages, however when I add the "mbtcp" filter, it does not show anything. Am I missing something?

Thank you!

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frank66
asked 2023-08-02 01:22:40 +0000
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grahamb's avatar grahamb (2023-08-15 13:45:59 +0000) edit
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Ok, I found the issue but I am puzzled: I sent Modbus TCP query/response from a Node_red simulator and WS did not recognize this traffic as "mbtcp" but I used a different modbus simulator and was able to capture the mbtcp traffic.

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frank66
answered 2023-08-02 02:14:58 +0000
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