Multicast messages


I am trying to connect to a network of PLCs through a new Cosy 131. Initial set-up worked without any issues. I can ping all my devices remotely, and I can get full access to most devices, like our ABB VFD.

The issue comes with accessing the PLCs. These communicate with Multicast messages. I have attached a screenshot of a typical Wireshark capture on the LAN side. These messages are not visible when capturing data on the device running eCatcher (on its TAP interface). I have tried turning on the BroadcastForwarder option on my Cosy. This did seem to do something, because my data usage rate went up, but I still didn’t see anything on my client side.

Do you have any advice on how to get this working?