topic Re: Run VI in LabVIEW

Run VI

enzo78 — Fri, 30 May 2008 16:19:55 GMT

Hello

I`ve a problem with the run of the VI. I want that my VI run when opened, so I`ve set ``Run when opened`` into the Properties -> Execution of my VI.

But When I open this it does not run.

What Do I wrong?

Thanks

Message Edited by enzo78 on 05-30-2008 11:19 AM

Re: Run VI

smercurio_fc — Fri, 30 May 2008 16:23:47 GMT

Depends on how you're opening it. If you open it from the file system it wil do it. If you have it as a subVI on a block diagram and double-click the icon on the block diagram it won't run. In fact, the latter is used as a method to allow you to open a VI that is set to automatically run when open.

Re: Run VI

enzo78 — Fri, 30 May 2008 16:26:45 GMT

Hello

I`ve created an executable, and when run it does not work

Thanks

Re: Run VI

smercurio_fc — Fri, 30 May 2008 16:36:56 GMT

In the project specifications did you set the your VI as the startup VI? Do you also have the "Show front panel when called" and "Close afterwards if initially closed" options set in the "Window Appearance" section? I assume your VI has some form of loop that allows it to run continuously once started.

Re: Run VI

enzo78 — Fri, 30 May 2008 16:42:00 GMT

Yes I set the "Show front panel when called" and "Close afterwards if initially closed" and my VI has a while loop, but where can I set the VI as the startup VI?

Thanks

Re: Run VI

smercurio_fc — Fri, 30 May 2008 16:50:42 GMT

Assuming you're using LabVIEW 8.x, you set this up in the "Source Files" section:

Re: Run VI

enzo78 — Fri, 30 May 2008 16:59:43 GMT

Yes olready done, I send you my VI.

Re: Run VI

smercurio_fc — Fri, 30 May 2008 17:04:55 GMT

When I opened your VI I did not see the "Run when opened" option checked. It was unchecked.

Re: Run VI

enzo78 — Fri, 30 May 2008 17:12:37 GMT

I`m sorry , I send you a wrong VI, This is the correct one.

Re: Run VI

smercurio_fc — Fri, 30 May 2008 17:36:42 GMT

Your VI is running. The problem is in your logic for the control of the loops. The way it's set up the main loop will stop after one iteration because the default value of the of the "Instrument ON/OFF" control is False. Also, your logic for the control of the two loops is opposite with regards to that control. Thus, in the one loop setting it on stops it. In the other, setting it on allows it to continue.

Re: Run VI

enzo78 — Fri, 30 May 2008 17:49:45 GMT

The first loop would run until I turn on The switch " instrument on?oFF" because it is False at start-up.

After I turn on The switch The second loop would run until I turn off the switch... Sorry, I don`t understand where I wrong.

Thanks

Re: Run VI

smercurio_fc — Fri, 30 May 2008 17:59:49 GMT

That's not what's happening because that's not how LabVIEW works. Both loops start up when you start the VI. Once the second loop starts it reads the value of that control. It's False. In all likelihood the other condition is also False, which means the loop control terminal receives a False, and therefore stops after one iteration. Meanwhile, the other loop is happily going on because the control is False. Run your VI in the development environment with execution highlighting on (the light bulb in the toolbar), and you will see what it happening.