How to run a case only one structure

Hello!

I looked into the many threads on this issue, but I still Don t undestand how an event to run once the true value, without having to stop and run again the VI to run once more...

If I am wiring a Boolean control, for example, in a housing structure that contains a beep VI, it sounds permanently set to true... I want that it beep only set to true, but if I switch to false and true again, which emits a sound again only once... I have found how haven´t... I ve tried it with shift, local variables, Boolean logic registers, etc... but I m not doing things... Can someone help me? I m not very good in Boolean logic... actually I m not very good at programming in LabVIEW lol... but I still have to do that...

Thank you!! Have a nice day... = D

Mia.Lara wrote:

I looked into the many threads on this issue, but I still Don t undestand how an event to run once the true value, without having to stop and run again the VI to run once more...

If I am wiring a Boolean control, for example, to a structure of housing which contains a beep VI, he sounds permanently set to true... I want that it beep only set to true, but if I switch to false and true again, which emits a sound again only once... I have found how haven´t...

There are a few confused points in your description, for example, a value of event of change runs only when the value changes, so it will run only will-> and > turned off and will not continuously fire as you describe. And stop and to rerun the VI should not make a difference.

In the second paragraph, you suddenly talk a structure case (what happened to the event)?

Could you please be a little more specific. Why not join one of your attempts to code so that we can hopefully understant what you actually have.

If you want the button to go true for a moment and return false automatically once it has been read by the code, use an action latch button. If you want the button turn on or off each time you press on it, but always only trigger the beep when the status changes from false to true, all you need is a feedback node and one "implies".

Take a look at the logic of the stop > on LED in the example shown here.

Tags: NI Software

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