NI 9402/cDAQ9185 How to dynamic change a dutycycle of a fixed frequency output

[uf]

Hi.

I have a NI 9402 were I need to dynamically change the dutycycle "on the fly" on a predefined digital output frequency (up to 2kHz).

Is this possible with a cDAQ or will this require a cRIO solution?

[Kevin_Price · Accepted solution]

You should be able to do this with a continuous counter pulse generation task using DAQmx on a cDAQ.  cRIO shouldn't be necessary.

You'd use one of the chassis counters and route its output to a DO pin.  Note that you may need to write both freq *and* duty cycle together to make the duty cycle change "take hold."   See this thread for more info.

-Kevin P

[uf]

Many thanks Kevin 🙂

I got it now