The application like below:

The communication is Open socket.

PLC plays as a server keep listening one specific port. PC is client, send message to PLC to the port which is the same with PLC listening.

If it is feasible for PLC to do it.

After I check some documents:

If I could use NetPro config as:

Not fill the remote IP and port number.

Still use AG_RECV to get data from this ID.

Thanks for your information.