How to determine Communication error in IAC between 2 controllers?
In the program or control module where CV variables are defined. In that write the following line in a page,
CV_variable:status := Comm_Status;
In the above example CV_Variable is your communication variable and Comm_status is a dWord type variable to which you want to write status.
Using this dWord variable we can define communication error.
This method can be followed in all versions of 800xA.