gray out switch

[drek123]

Dear,

Does any know how to do it , when i use the switch the led should stay on and the switch should be grayed out

[Norbert_B]

That VI is simple..... TOO simple.

You require a loop in the code (don't forget a time delay!). And you have to learn about properties of controls.

Did you walk through the online training material for LV or attend a class at NI? If not, please do so!

thanks,
Norbert

[drek123]

i know about the property nodes but but once someone hits the switch the switch should be grayed out and the led should stay on,

so i dont know why i should use a timed loop

[GerdW]

Hi drek,

but once someone hits the switch the switch should be grayed out and the led should stay on

IF button THEN
  GrayOut(button)
  LED:=TRUE
ENDIF

so i dont know why i should use a timed loop

No, you need to use a loop. The timing is just needed to not hog your CPU…

[Norbert_B]

Next thing to consider:

If the button is grayed out, it cannot be used anymore by the user. You should add code to re-enable the button and another code to stop the VI.

DO NOT USE RUN CONTINUOUSLY!

Norbert

[drek123]

it is just what i wanna do, gray out the switch so the user cant use the switch no more until end of program

[T._P_Titherington]

Hi,

What is this application for? Good practice would be to use the Queue Handler project. It’s a steep learning curve but it’s well worth it. This way you can make use of the event handling loop to reframe from constantly polling and to easily implement your grey out. If you don't want to go down that path here is an image of a way to perform this task using a case structure and shift registers. I highly recommend you look into the examples.

[drek123]

i know how to make the property node Disabled but not how to make the bleu Disabled and grayed out function

thx very much already

[GerdW]

Hi drek,

how do you create a constant in LabVIEW?

Usually you right-click an input and Create-> constant…

Pretty basic LabVIEW stuff: did you take the free beginner courses?

[drek123]

You mention enum constant i guess