New Holland CX720 Repair Manual page 1445

The status of the circuit will be indicated as either "OK" or "Error", depending on the detected condition. As in the
"Digital" screen, the output may be manually controlled in the "Status" screen also, simply by pressing the "Enter" key
to change the position of the switch icon on the bottom right of the screen.
PWM Solenoids
PWM solenoids are used where progressive engagement of the solenoid is desired, such as for the thresher, feeder
and unload clutches, chaff spreader valve and header controls. Most PWM solenoids are grounded locally, but where
precise control of the solenoid is required, the solenoid is grounded back through the module. This feedback allows
additional monitoring of the current flow through the circuit. The PWM outputs are limited to 3 amps maximum current
flow.
PWM outputs have two diagnostic screens available, if grounded locally, or three, if the solenoid is grounded back
through the module.
The "PWM" provides a bar graph that provides a reference of the amount of output that the software is attempting to
drive the solenoid at. When monitoring the output, it is possible to see the progressive engagement of the output on
the bar graph.
NOTE: If the circuit is shorted to ground, the bar graph will continue to indicate a rise in output, even though the
module has shut off the output in order to protect the output driver.
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