Digital PID Loop Output from MV?

[Chris Johnson]

I'm setting up a PID loop with a digital output. It's a heating pad (which heats up pretty quickly). I've been looking for a good example of PID loops with digital outputs and haven't really found much. It seems like I just need to find a way to turn a 0-100% value into a binary value which turns on and off rapidly.

I made a simple little VI which I would attach to the output (MV) of the PID loops (standard). I just wondered if anyone could let me know if this is good enough? Is there a level of complexity I haven't thought of yet?

[SimonH]

Are you looking for a PWM digital output?  If so, this thread might be useful.  It uses a USB-6008 for the digital ouput so it should work with any NI-DAQ device with a digtial output.  There are better ways of doing PWM with more capable devices but it's a start.

~Simon