I hope you are refering to TRi brand of PLC? This forum is only for support TRi brand of PLCs.
You need to run the TLServer, then test the communication with the PLC using the TLServer's "Serial Port Setup". Once that is done, all you need to do is to run the TRiLOGI software client and enter the IP address of TLServer, or just 127.0.0.1:9080 if the TLServer and TRiLOGI are both on the same computer.
