[Greg McKaskle]

My advice would be to spend more time debugging. Since the cRIO is modular, replacing the whole thing shouldn't be necessary in most cases. Spend a bit more time debugging and you can spend less swapping components in and out and winding up with a pile of parts that "may" be bad.

I'd start with the SW or HW split. If you have diagnostic errors due to watchdog timeouts or other configuration issues, fix those first. If the SW is not producing any errors, trace the pwm values to see if the SW is setting them to zero.

From there, if the SW is setting the correct values, but the SW isn't responding, you can isolate the speed controller, digital sidecar, and digital module.

Greg McKaskle