Siemens SINAMICS G120 Function Manual page 144

Alarms, faults and system messages
6.2 Disturbance characteristics of the safety functions
3. Acknowledge the fault code (see Section Acknowledging faults using a fail-safe signal
4. Switch the motor on again (ON command).
Response in the event of a discrepancy
A discrepant signal at a fail-safe input, e.g. caused by a cable break, results in safety
function SLS being selected. After the tolerance time has expired, the inverter signals the
discrepancy (alarm C01770 or C30770) but does not interrupt the SLS function.
Figure 6-8
To switch the motor on again, you have to rectify the discrepancy and acknowledge the
discrepancy message (see Section Acknowledging faults using a fail-safe signal
(Page 136)).
144
(Page 136)).
Response of safety function SLS in the event of a discrepancy
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA