Prepare necessary software
Download specialized software to assign IP address to PLC Phoenix contactact follow the link
Assign IP address to computer
Assign to the computer’s network card (LAN cable card) the IP address of the same network class as the one to be assigned to PLC/RTU, for example, if you want to assign the PLC address 192.168.0.53, the computer address will be 192.168.0.x
Assign IP with Connect+
Turn on Connect + Select Assign IP and fill in the desired IP address for the PLC/RTU then select Next.
Wait 15-30s for the PLC/RTU type to appear with the appropriate Mac code starting with 00.A0-74…. Selecting Next will automatically assign IP to the PLC/RTU