How can I run a SubVi in background when a sequence is running in the main VI

[Hugo Lemieux]

What I want to do is this

When I push a button on the main VI, a SubVI (#1) must run and take data.
At the same time, a sequence, in which there are other subVIs must run.

My problem is that the subVI #1 does not run when I push the button. The sequence is running well. How can I run both the sequence and the subVI at the simultaneously?

[Chris_VH]

Hey Hugo,

Sounds like you'll just want to do some parallel loops. I'll attach a screenshot of a VI that has a sequence where the counter goes up to 3, then restarts, each time it reads the iteration count from the subVI above. (The subVI is just a while loop with the iteration count attached to the global)

Each iteration of the sequence shows an increased count from the subVI via a global variable.

Is this what you are looking for?

 

Keep in mind that I just threw this together to show functionality, its got a lot of rough edges to it.

Message Edited by Chris_VH on 03-30-2009 03:59 PM

[GerdW · Accepted solution]

Hi Hugo,

when the sequence and your subvi don't have any data dependencies, they will run parallel...

Do you mind to attach some code or pictures of block diagram?

[Hugo Lemieux]

I tried to copy the whole code of the subvi #1 in the main vi, then erased the subvi. It worked well.

[GerdW]

Hi Hugo,

if you did as described then it should have worked before too...

Anything else that may help others to solve such problems too?

[rexator]

Yes, please!

I run subvi from parallel loop as described above... But when subvi runs, main vi is NOT operational (can't press no buttons, or alter anything).

Is there a way to keep subvi running and also be able to keep using MAIN vi?

Thanks!

[Dennis_Knutson]

If you really have parallel loops with no data dependency, then the main will run. You need to attach your code so someone can see what you've done wrong.

It's also a good idea to create a new question instead of posting to a 'Solved' thread.

Message Edited by Dennis Knutson on 05-05-2009 10:42 AM

[rexator]

My main vi is very large. No way I can paste it here 😞 But parallel loop is very small - just button calling subVi inside.

I can't think of any data dependency unless it is that button? ('rozplyw 2' is located on main vi's frontpanel. naah...

main vi freezes while subvi is showing. Just picture on subvi's front panel - nothing more.

PS: Sorry if I post at wrong place, but it seems natural to me to continue just the same thread, especially there was:

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Anything else that may help others to solve such problems too?

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[Dennis_Knutson]

Sorry, I can't view your image. Why didn't you simply attach it to your post?

[rexator]

I think I've just done so... But here's the link anyway: http://www.freeimagehosting.net/uploads/e921245685.jpg

Thanks!