Siemens SINAMICS G120 Function Manual page 197

Figure 6-25
The inverter signals the active SLS level via PROFIsafe to the higher-level control. See also
Section: Control word 1 and status word 1 (extended functions) (Page 48).
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
Switching between different monitoring thresholds
Operation
6.6 Safely Limited Speed (SLS)
197