
Originally Posted by
david.cerdeira
Dear milosh,
The S7TCP32 driver does not inform in the runtime about the current connection used, so that it switches automatically to the alternative connection when the current connection is interrupted (e.g. PLC not reachable).
In any case, during project engineering phase you can use a help of Diagnosis Viewer as this tool allows you to watch online and get very detailed logs of all zenon related processes, including the S7TCP32 driver. With the default settings, a driver only logs error information, but Diagnosis Viewer also allows to enhance the diagnosis level to "Debug" and "Deep Debug" and see all other important tasks and events.
Documentation references:
Manual > Tools > Diagnosis Viewer
S7TCP32 > Error analysis > Analysis tool
On the other hand, Windows Resource Monitor app also gives you a very good live insight of the overall OS resources, including network connections established. When filtering to the S7TCP32 process, you can find detailed information about the respective connections established in the Network tab, e.g. target PLC IP address.
Good luck.
Best regards,
David Cerdeira