What is the physical output device state during a major nonrecoverable fault?

During a major nonrecoverable fault in a Rockwell ControlLogix system, the physical output device state is set to "Off." This behavior is critical for safety and system integrity. When a major fault occurs, it indicates that the system has encountered a significant issue that cannot be resolved during normal operations. By deactivating all outputs, the control system prevents potentially hazardous situations, such as equipment damage or unsafe conditions, from occurring.

The "Off" state serves as a fail-safe mechanism, ensuring that all commanded outputs are turned off until the fault is diagnosed and rectified. This is essential in maintaining control over the physical processes and machinery connected to the controller. Therefore, the system prioritizes safety above all, which is why the correct answer reflects the need to turn off outputs during such critical failures.