800xA - PLC Connect - Annoying event: "No OPC DA Data Source for OPC DA Item"
I'm having a slight issue with the PLC connect extension for 800xA v. 5.1.
It seems that every time an aspect that uses one or more PLC connect variables is viewed from the Object type structure, an event with the message “No OPC DA Data Source for OPC DA Item” is generated.
Consider the simple example in the attached file PLCC_symbol.jpg where I’ve created a PG2 symbol that uses the PLC connect variable $’pr::testttt:Binary PCA’. Now, every time I open/view this symbol from the Object type structure (for example when I browse the Object type structure in the Plant explorer and select the aspect), such an event is generated on the client I’m using. See the attached event.jpg.
Is there a way to prevent this event from being generated?
Answers
This per design and can, as far as I know not be prevented.
If a data subscription is attempted from a location lacking an OPC Data Source "at or above" the object itself, the stated message will be logged as a warning.
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