counter for Led

[rabab]

Hello,

I am a beginner in labview and I  want measure the time the LED spend on and off.

thank you

[ArmandoF]

Hello rabab,

Can you provide us more context?

What LED are you talking about?
Is it a boolean indicator? Is its value set from a measurement or a calculus?

Don't hesitate to join your code.

Have a nice day.

Kind regards,

Armando

[rabab]

hello,

thank you for replying,

the led is of type boolean. I want to make a connection between step7 and labview,  when I activate the PLC entry the led turn On  and when I disable the LED turn off.

I want to measure how much time the LED stays on.

sorry for my bad English.

[ArmandoF]

Hello rabab,

I would suggest you to use an event structure for doing it (http://zone.ni.com/reference/en-XX/help/371361P-01/glang/event_structure/).

You can start a timer (VI Counter) when the boolean is changing its value and then stop it once again at second value change.

Good luck!

Kind regards,

Armando