Ignition Edge Project Script Value or Quality Script not Firing

Ignition
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1

Context: I have a script which fires on value (or quality) change that searches a dictionary of integers and looks up an associated engineering unit (and writes to .EngUnit). The ignition edge instance pulls the integer in over OPC UA.

Problem: In the development phase of the project (using trials), I expect that resetting the trial causes a re-connection to the OPC UA Server, to update the Quality of the tag, however, re-connection often does not trigger the script. When I apply the same script with no update, the script executes as expected.

Is there a better way to execute this type of script where either a value change or quality change, is expected to fire the script?

2

Seems odd to me that you'd be scripting an EU change. Does the EU change on the fly? If so, what value(s) determine the EU? Sounds like a job for an expression string to me, rather than using the included tag EU property.

What does your script look like? Does it check for initial change?