PID While Loop

[RyanN]

So a few problems here.

A while loop with no time constraint is asking for trouble. It'll eat up your CPU resources running as fast as possible while not maintaining a constant delta time between calls. That will make it untunable since the dT between calls is never the same. That's my biggest

If you want to terminate a separate running while loop, you can use Notifiers. Definitely look at some example code in the LabVIEW help. If you use Obtain Notifier in code that you call often, you need to call Release Notifier, or else it will eat up all your RAM over time. Ask me how I know...

But, as aeastet, you typically want to keep your PID running at all times. Perhaps put it in a while loop in Period Tasks that runs every 50ms? You can share the set-point using global variables or notifiers.

[Alan Anderson]

It looks like you want to share data constantly between the two loops by running wires between them. That's not how LabVIEW works -- a loop doesn't produce an output until it has finished running. You need to put everything in the same loop, or you can share data using variables (local or global) or queues or some other mechanism.