I have an expression tag defined in my designer, what does is to count the time that a digital OPC tag remains as TRUE. Was working well but some days ago I realized that the Quality of the expression tag changed (i don’t know the reason) from “Good” to configuration error “server “OPC server” does not exist”, I would like to know why this happened, and which is the mechanisms the expression tags use to solve their Quality property
In your gateway, is the Ignition OPC UA Server client connection up and running? What is the status on that?
Can you share a screenshot of the error?