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Wireshark capture between two Modbus Serial devices

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How to setup wireshark capture between two Serial Modbus Master/slave Devices? - Modbus RTU Protocol.

asked 30 Jul '15, 05:51

Narasimhan%20Ragunathan's gravatar image

Narasimhan R...
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One Answer:

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Out of the box it can't. The usual way to monitor such traffic is to convert the serial traffic to Ethernet using a device server such as these Lantronix devices (there are other similar, cheaper, devices available). You can then use one device at each end and use a tap or switch with port mirroring (or even a hub) in between each end and then capture the traffic.

If the Modbus master is on a PC, the application can often be configured to use TCP/IP instead of serial, in this case you only need one device server at the Modbus slave end.

answered 30 Jul '15, 07:07

grahamb's gravatar image

grahamb ♦
19.8k330206
accept rate: 22%