We are experiencing a problem where good data is being substituted by Bad values.
I know the snapshot value was good, because the analysis using the data is done correctly. But after some time the data gets substituted and the analyses will fail when using the backfill/recalculating option.
The data itself is collected by the PI Connector for OPCUA. The tags I'm referring to are of datatype String. Seems other data types doesn't have this problem.
Any idea which application is responsible for the substituted bad value? Why and how to prevent?
Hope someone can shine a light on this behavior.