Recursive VI

[aah31]

All,

Is there a way in LabVIEW 2009 to have a VI call itself while it is running, and start over?

Thanks,

Anthony

[asbo]

Can you clarify what you mean by 'start over'?

[Ton Plomp]

If you mean by recursive that a function calls itself, you can set a VI to be 'reentrant'(vi properties->execution), now you can drop a VI on it's own block diagram.

Ton

[aah31]

Say perhaps I have a device that errors out and I want to start the main VI over to re-initialized devices, can this happen during the middle of the main VI?

[Ton Plomp]

Say perhaps I have a device that errors out and I want to start the main VI over to re-initialized devices, can this happen during the middle of the main VI?

Ah, that has nothing to do with recursive-ness.

You shcould use a state machine that starts a 're-init' state upon certain errors.

Ton

Edited June 11, 2010 by Ton Plomp

[TG]

Say perhaps I have a device that errors out and I want to start the main VI over to re-initialized devices, can this happen during the middle of the main VI?

Yes it can

Using a state machine with exception handling built in would solve your problem though there would be some time in learning how to

make one (or get one) and then learning how to use it.

[Wire Warrior]

If you want to check out a really versatile state machine design, look at the JKI state machine template found at http://www.jkisoft.com/state-machine/. I really like this template and there are videos, tutorials, and examples that explain its operation.

Jason