Programmatically determine terminal connection

[mrclary]

Is it possible to determine whether a subVI terminal is wired or not from within that subVI?

[EdDickens]

I believe this is possible using the unsupported and undocumented LabVIEW scripting features.

There's an entire forum dedicated to LabVIEW scripting over on the LAVA site.
http://forums.lavag.org/index.php?s=daefc9240b02b126605942e1cbc8be66&showforum=29

Good luck

Ed

[altenbach]

What exactly are you trying to do?

In a typical scenario, you would leave some of the connectors unwired in the calling program and then you want to detect during running which terminals did not receive data from the calling program. Easiest would be to set a unique default value for each control, then test for the presence of this value in the subVI code and e.g. switch a case structure or similar.

Just pick something that usually does not appear in your input data::

numeric DBL: set the default value to NaN, -Inf, Inf, etc.
Numeric I32: set the default value to -1 if the number is typically always positive.
Arrays: Set default to empty array.

etc.