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asked 2018-05-01 22:14:52 +0000

brikhaus gravatar image

How to capture modbus tcp traffic

I currently have a new PLC installation that has some Modbus communications going on over TCP/IP. All the equipment is connected to an Allen Bradley Stratix 2000 switch. According to the documentation this switch is an unmanaged switch. I connect my laptop to an open port and set an IP that is local with all the other devices. I have ran a couple of captures but there is no Modbus traffic showing up. Am I doing something wrong?

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updated 2018-05-02 01:27:01 +0000

Guy Harris gravatar image

How to capture modbus tcp traffic

I currently have a new PLC installation that has some Modbus communications going on over TCP/IP. All the equipment is connected to an Allen Bradley Stratix 2000 switch. According to the documentation this switch is an unmanaged switch. I connect my laptop to an open port and set an IP that is local with all the other devices. I have ran a couple of captures but there is no Modbus traffic showing up. Am I doing something wrong?