Hello Todd,
The easiest way to inspect engine tags is to use the CVT plugin. The CVT plugin allows a user to select specific engine tags to be written into a global variable. These globals can then be read in a debug loop in the main VI to check their values. It is a pretty lightweight probing mechanism.
The Temperature Controller shipping example demonstrates this in the 'Full System Configuration' file.
There are other approaches that you can take, including using traditional LabVIEW debugging methods in the engine code itself, but the CVT seems to cover most needs pretty well. Let me know if the CVT isn't a good fit for your use case or if you have more questions on how to use it.
-Burt
