1746-ni8 de bouncing

[cornbread]

I have a application where I'm using a 1746-NI8 to bring in a pressure, once up to pressure I'm closing a block valve. My problem is if the pressure is right on the edge my output will flicker. Is there a way to create a dead band / debounce using the input parameters of the 1746-NI8?

 

[Mickey]

You can apply a filter to each channel. ( see pdf below)

If tha doesn't work you can use a filter in your logic ( see text below)

 

[Honga]

Depending on how responsive your system needs to be you could put hysteresis on the input, a time delay on state changing mode, or detect bouncing by the unrealistic change frequency of your sensor compared to the actual change in pressure.

 

[robo77]

ya I usually time the value and latch it so no bounce occurs.

 

[cornbread]

I turned my float to a integer and the problem is solved..it gives me a dead band of 1 psi