Siemens Sinamics S110 Function Manual page 305

Acknowledging the safety faults
Faults associated with Safety Integrated Basic Functions must be acknowledged as follows:
1. Remove the cause of the fault.
2. Deselect "Safe Torque Off" (STO).
3. Acknowledge the fault.
If safety commissioning mode is exited when the safety functions are switched off (p0010 ≠
95 when p9601 = p9801 = 0), all the safety faults can be acknowledged.
Once safety commissioning mode has been selected again (p0010 = 95), all the faults that
were previously present reappear.
NOTICE
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.
Acknowledgment via PROFIsafe
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 via F-DI
If the signal "Internal Event ACK" is connected with an F-DI, a falling edge in this signal
resets the status "Internal Event" and so acknowledges the fault. For safety reasons, the
external signal on the F-DI with the "Internal Event ACK" function must not be set
continuously to the "1" level; for acknowledgment, it must first be set from the idle state "0" to
"1" and then back to "0" again.
Description of faults and alarms
Note
The faults and alarms for SINAMICS Safety Integrated are described in the following
documentation:
References: SINAMICS S110 List Manual
Drive functions
Function Manual, 10/2008, 6SL3097-4AB10-0BP0
Safety Integrated Functions
8.4 Basic Functions
305