COM1 - external switch launch a SubVI

[smercurio_fc]

Your description of the switch is changing and contradictory. You previously said:

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If I push the external switch the first time the LED sould be ON, if I push the external switch the second time the LED sould be OFF, if i push the external switch the third time the LED sould be ON etc

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Now you are saying this:

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If I push a external button (COM1, Pin2 and Pin3), at the "VISA Reads" output "read buffer" appears the Input (from Visa Write) in this example is it "Test" as long as I push the button. The LED is ON. If I push the button again, the LED is OFF untill I push the button again.

The mechanical Action of this external Button is comparable with Latch until released.

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Now you're talking about  "as long as I push the button", which means holding it down. Your previous explanation described a "Latch when released" mechanical action. Your new description does NOT describe a "Latch until released". I don't know what it describes since I've never heard of a physical switch that behaves the way you're describing it.

If we assume a regular push-button switch, then the following should work:

[zerotolerance · Accepted solution]

Looks like we have a language barrier.

So, for the sake of getting the behaviour of your LED right, is the attached example what you wanted?

Kas

[zäpfle]

Thanks a lot for your help.

The last example was the solution.

It looks so easy, but sometimes are the simplest things the most difficult.

zäpfle