Siemens SINAMICS S120 Function Manual page 89

Acknowledging the Safety faults
There are several ways to acknowledge Safety faults:
● Acknowledgment through deselection of STO or SS1:
– Remove the cause of the fault.
– Deselect "Safe Torque Off" (STO) or "Safe Stop 1" (SS1).
– Acknowledge the fault.
If the Safety commissioning mode is exited when the Safety functions are switched off
(p0010 ≠ 95 when p9601 = 0), all Safety faults can be acknowledged.
Once safety commissioning mode has been selected again (p0010 = 95), all the faults
that were previously present reappear.
● The higher-level controller sets the signal "Internal Event ACK" via the PROFIsafe
telegram (STW bit 7). A falling edge in this signal resets the status "Internal Event" and so
acknowledges the fault.
● Acknowledgment by switching the drive unit off/on
Safety faults can also be acknowledged (as with all other faults) by switching the drive
unit off and then on again (POWER ON). If this action has not eliminated the fault cause,
the fault is displayed again immediately after power-up.
Description of faults and alarms
Note
References
The faults and alarms for SINAMICS Safety Integrated Functions are described in the
following document:
References: SINAMICS S120/S150 List Manual
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Description of Safety Integrated functions
4.1 Safety Integrated basic functions
87