Siemens SINAMICS G120 Function Manual page 190

Operation
6.6 Safely Limited Speed (SLS)
Selecting SLS at low motor speeds
If the motor speed when selecting SLS is less than the SLS limit, then the drive responds as
follows:
With braking ramp monitoring
The inverter monitors the speed after the "delay
time for the braking ramp".
Deselect SLS
If the higher-level controller deselects SLS, then the inverter deactivates limiting and
monitoring.
190
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Without braking ramp monitoring
The inverter monitors the load speed after an
adjustable delay time has expired.
Function Manual, 04/2014, FW V4.7, A5E34261271B AA