I have been on the phone with Digi tech support and they are not much help. Basically port 2 of the Digi Portserver TS 4 MEI I have set up for IA Modbus TCP that a freewave radio is connected too rs232. I am trying to reach slave Radios on PLC’s in the field with ignition. I can get the traffic to go out but no traffic to come in. The other sites I am trying to read data from are SCADAPack Plc’s with Freewave FGR2-C-U radios. I am a little confused on how one static IP knows which port to go to for requesting the slaves information.