9481 PWM in real-time

[TJ_Reed]

Hello,

I'm currently trying to control a heater with a 9481 relay module running in real-time on a cRio. According to some of the NI brochures, the 9481 has PWM ability (not 100% sure of this). Is this true? How do I go about accesing the PWM functionality?

I've done this using a compact DAQ and a counter output but not with the 9481 or a cRio (in scan mode).

And if it is not possible, what would be a better route to go if I must use the 9481 running a on a cRio?

Thanks in advance!

-TJ

[huyu · Accepted solution]

Hello TJ

First of all, the NI-9481 itself can not produce the PWM, but it can function in cDAQ. That because the cDAQ chassis will finish the PWM part of the work.

Now that you are using a cRIO, all the PWM work you should finish your self (the 9481 can not work as PWM under Scan mode), you must use FPGA mode.

There is some example you can find in example finder

 

Just write the digital output to the 9481 port