I was searching for suitable Modbus hardware (we have some already installed) for point-to-point communication via existing network, I came across new EtherCAT one. So wonder if different protocols can coexist together. In other words, when a certain automation protocol (EtherCAT, Modbus, Powerlink, EtherNET/IP, Profinet IO etc.) can be used as a plug-and-play solution or when additional modifications must be done to the existing network? It depends on switches?
P.S. I will give it a try how EtherCAT performs. It looks to be future-proof.