0: STO alarm locked (the SAFE fault can be
reset)
Alarm locking refers to that after a SAFE fault
occurs and the state is restored, you need to
manually reset.
1: STO alarm not locked
No alarm locking refers to that after a SAFE fault
occurs and the state is restored, the alarm is
automatically deleted.
Note: All of STL1 to STL3 faults are set to alarm
locked, and cannot be reset. After the state is
restored, you need to apply power again for
reset.