
Cross referencing is useful function block to pass data between different CLD sheet; both in same and/or other PCUs.
But what does the acronym in the block mean. For example, “BA.4.1” in tne image shown below?

The first 2 letters are to denote PCU ID. Right-click on any PCU and select Properties.


The number after the first period is the CLD document number

And the last number is the sheet number.

