I cannot figure out the correct syntax for a child substitution parameter to use to get a child attribute to lookup a pi point.
The basic Tag is entered into a child attribute as a string. Then I'm trying to reference that attribute's value and add a suffix to the tag to get the full tag name for the point I want. So the full tag is "00PAA00CY001_XG02". Everything I have tried with substitution parameters hasn't worked yet, is this different because it is a child attribute? Thanks in advance for any help/pointers!