Controller modes of operation

The controller mode during which logic is executing, inputs are read, the program is scanned, and the outputs are energized and de-energized. Editing operations are restricted. If the keyswitch is in Remote, the controller is in Remote Run mode.

The controller mode during which logic is not executing, outputs are not controlled, and editing operations are available. If the keyswitch is in Remote, the controller is in Remote Program mode.

The controller mode entered when a major fault occurs and is not handled by a fault routine or controller fault handler program. Most operations act as if the controller were in Program mode, but it is impossible to switch back to Run mode without clearing the fault condition.