Re: [EXTERNAL] Failed connection using e3-s7plc to Siemens S7-1500

["Hartman, Steven via Tech-talk" <tech-talk at aps.anl.gov>]

On Oct 28, 2021, at 9:41 AM, Mateusz Nabywaniec via Tech-talk <tech-talk at aps.anl.gov> wrote:

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. 

-- 
Steven Hartman
hartmansm at ornl.gov