PLC is at risk of being in a shutdown state, and the following steps should be taken to restore it.

1. Turn the start switch of the PLC to STOP.

2. Cut off the power supply to the PLC and wait for 5 seconds until the status light goes out.

3. Power on again and it should be in the normal STOP state at this time.

At this point, the crash information of the PLC can be confirmed. Obtain error information through the following methods:

1. Ensure normal communication with PLC.

2. In the "Tools" menu bar, click on "Get PLC Hardfault" in the "Superior operation" function area.