10/28/21 08:44:00.763 s7plcConnect cpu1: background connect to 192.168.0.1:2000 failed: Connection refused
The error message “Connection refused” tells you that it was unable to establish a network connection to the TCP socket specified. That error is typically the result of attempting to connect to a port that does not have a server listening, but could also
be the result of a firewall blocking the connection.
Verify that the PLC is indeed using IP address 192.168.0.1 and that port 2000 is correct from
the documentation. From the host running the IOC, try ’telnet 192.168.0.1
2000’. If that is also showing “Connection refused” then the IOC won’t do any better.
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