Siemens SINAMICS G120 Function Manual page 132

Commissioning
5.7 Setting extended functions
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4. Close the screen form.
You have set the SS1 function with braking ramp monitoring.
Description: SS1 with braking ramp monitoring
Figure 5-17
Reference speed and monitoring time
The two values define the gradient of the SBR monitoring .
Delay time
The SBR function only starts after an adjustable time. To begin with, the inverter monitors
the speed setpoint that applied when SS1 was selected.
Braking
The inverter brakes the motor with the OFF3 ramp-down time.
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A monitoring time shorter than the above calculated value does not make sense, as
the inverter can reduce its monitoring curve faster than the load can be braked.
The longer you set the monitoring times, the more tolerant the monitoring.
⑥
Reference velocity (reference speed):
Set the reference speed to the value of the maximum speed.
SS1 with braking ramp monitoring
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA