[Cause]
The protective fence circuit is abnormal (the chain of protective fence signals is abnormal).
[Countermeasure]
It may be caused by incorrect wiring of the FENCE signal or failure of related components. Take appropriate countermeasures according to the "Troubleshooting based on alarm code" in the control device maintenance manual corresponding to the control device used. After taking countermeasures, perform the operation to release the chain abnormal state.
1) Temporarily press the emergency stop button on the teaching pendant or operation panel, and then release it.
2) Press F4 "Reset" on the alarm occurrence screen [4 Alarm].
3) Press the RESET button.