I have a couple of addresses in a PLC that I am writing to and reading from over Modbus TCP. However, the data itself is being sent on EGD. When I apply the filter for showing EGD, I can see the data packet (usually 88 bytes long) but I cannot make out anything of the content. Is there a way to dissect the contents of the data packet and verify that data I send from my system is actually being sent correctly by reading the contents of the data packet? In that case, how do I do that (which filter and preferences do I use)?
asked 19 Mar '13, 07:44
You have Modbus/TCP being transported over EGD? If that is the case, the EGD dissector only shows the data content, it doesn't do any further dissection or make it available for other dissectors to use, e.g. Modbus/TCP.
answered 19 Mar '13, 08:27