increment by 1 digital input

[Ali84]

Hello,

I'm trying to make a 1 by 1 counter with a digital input from my DAQ. I have a sensor connected to the digital input channel and whenever it is activated, the program is supposed to increment a counter by 1. However when the sensor is activated, the counter keeps counting on and on (really fast). I want it to count only 1 with each pulse.

I have tried everything I can think of, case structure, event structure, signal collector, sequence...but with no result. Is there a way of limiting the count?

Thanks, hope someone can help

[Omar_II · Accepted solution]

You really need an edge detect.

[GerdW]

Hi Ali,

"with a digital input from my DAQ"

You should wire the digital input to a Counter when your DAQ supports it. Then you only count on rising edges of the digital signal...

Otherwise count only in the case of rising edges!

[Ralph@NES]

Omar,

I know this is older, but looking at your diagram and trying to replicate it, something doesn't work.

If I wire it exactly as shown, the feedback node stays black and doesn't 'pick up' the fact that it's supposed to be a boolean.  The only way I can get it to go boolean is to connect to the output of the comparison.

What am I missing?

[GerdW]

Hi Ralph,

you're missing correct wiring...

How should we help when you don't show your VI?

Did you wire the input of the feedback node?

Did you change the direction of the feedbacknode?

[Ralph@NES]

GerdW,

I didn't change the direction.  That was it.  :manlol:

Any chance I can get your attention in my other thread?  Count analog input

I'm trying to implement this example and while the example works, the remainder of the VI doesn't.  😞