Solution
The
NI-DAQmx Watchdog Timer has been configured to work with supported devices on the DAQmx API, so it won't be able to command an XNET module. It can control send commands to Analog, Digital, and Counter outputs.
To be able to use watchdog timing with NI-XNET, you would need to use the
Real-Time Watchdog Timer, which requires communication with a real-time operating system.