HI everyone,
I'm facing following issue with different Ignition gateways (Platform as well as Edge).
I have an OPC UA Server on my PLC and I read all the Tags over OPC UA. The connection is setup correctly since I can browse tags and get all the values that I need. At some point though something strange happens. All my OPC tags get following quality: Uncertain_LastKnownValue
The values do not change anymore and therefore are not written into the Historian database. When I try to write the OPC tag, the value does not change.
The interesting part about this is that the gateway says, that the OPC UA connection to my PLC is fine and running without any issues:
When I open my designer and try to browse any OPC Item Path of a tag I get following behaviour.
The PLC server is constantly loading and at some point I get a TimeoutException
This happens on different Gateway types (Pespective/Edge) and on different Hardware with different OS's. The only thing that helps is to reboot the Gateway PC. Rebooting the Gateway itself does not solve the issue.
Did anyone face such a problem and may have a solution to this?