Switch up to this that released some Boolean and default call nodes

I came across a curious phenomenon today that I can't really explain. When my VI has finished running, I want to retain most of the values of controller, with the exception of Boolean switches to pause or stop safely my request. Until recently, I was not able to do this, and I thought it was due to race conditions. By using the property node Value (I know now does not work for Boolean switches) and default reset call node no results, until I have experienced. That if the default reset runs asynchronous to the rest of the application, and is the last VI to run does not allow time to do its job?

So I implemented a small flat sequence (joint) and found that if you throw a wait between the end of the loop and the invoke node, it resets to the default value as expected. Try it yourself on your machine. I found waiting for the problem occurs when you set the wait not less than 80 ms and sometimes as much as 150ms.

Anyone know why this problem occurs?

Why do you use switch until published?  Which should be used for applications where you want the behavior of the momentary push button.

You should use switch when released.

I think that you do not have a status of critical competition because of bad behavior.  You press the stop button, that's true when you're now pressed.  The true stops the loop, you have a very short wait, then the reset to default product which returns the button returns to its default state.  During this time, you can't run that fast and you are always press the button down while all this is happening, then when you go and release the button, even if the VI has now ceased, this version cancels the action and return to the other State (since now it is false, it returns true).

This is why the value of waiting that you add seems to work if you do it long enough.  You yourself gave enough time to naturally release the button.

To prove it, make the long wait.  Then run your VI and press the button downwards, but takes even longer to release him.  You will see the same behavior when you add the very short or no, wait, and a much more natural on a button or release.

Do your mechanical action switch when released, and your VI will run as you expect.

Tags: NI Software

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