Disable Knob after click a button

[KnightBS]

Hi,

Im beginner and still learn how to use LabView to program. Would any know how to disable the knob after click a button? And also enable back knob after re-click?

[GerdW]

Hi bsang,

you should mark your thread as "LabVIEW NXG" as has been said in those pinned messages in the header of the LabVIEW board!

how to disable the knob after click a button?

You need to OBEY the DATAFLOW also in LabVIEW NXG: right now you disable the knob in parallel to your loop polling the button - but not "afterwards"…

And also enable back knob after re-click?

Set the button to enabled instead of disabled: use a shift register to store the current condition (like a boolean flag) and switch/invert that condition with each click…

(I guess NXG also allows to use an event structure!?)

[KnightBS]

Hi GerdW,

Thank you for reply my question. I still get no idea the meaning. Would you might to show me the step?

[GerdW]

Hi bsang,

I don't have NXG installed, so I cannot open your GVI.

You find an explanation of DATAFLOW in the LabVIEW help!

[KnightBS]

Hi GerdW,

Oh i see. Thank You for the reference.

As you given DataFlow link, I might not clear understand about Data Flow. Would you might provide example to show how to disable knob after click a button?

Thanks.

[GerdW · Accepted solution]

Hi bsang,

something like this:

[KnightBS]

Hi GerdW,

Thank you for the solution. I get the idea how to do. Btw the loop might a bit slow response after click Stop button. How can speed up the process time?

Thanks

[GerdW]

Hi bsang,

there is no wait function in your loops visible, so that VI will run as fast as possible.

No need to "speed up" anything here!

(You should think about using event structures to slow down that VI!)

[altenbach · Accepted solution]

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@KnightBS wrote:

Hi GerdW,

Thank you for the solution. I get the idea how to do. Btw the loop might a bit slow response after click Stop button. How can speed up the process time?

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You only need one while loop and no case structure.

[KnightBS]

Hi GerdW,

Thank you for advice and solution. I am glad to learn from you.

Thank You. Have a nice day.