Siemens SINAMICS G120 Function Manual page 202

Alarms, faults and system messages
6.2 Reaction of the safety functions to faults
Response in the event of a discrepancy
If the interface of the SLS function is a fail-safe digital input (F-DI), and a discrepancy signal
is present at this F-DI, e.g. caused by a cable break, then the discrepancy selects safety
function SLS. 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 deselect SLS, you must remove the discrepancy and acknowledge the discrepancy
message (see Section Acknowledging with a fail-safe signal or with a power on reset
(Page 191)).
200
Response of safety function SLS in the event of a discrepancy
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB