Siemens SINAMICS G120 Function Manual page 22

Description
2.5 Safe Stop 1, SS1
Braking behavior
● During the braking operation, the inverter monitors whether the load speed decreases
● The inverter uses the values set for the reference speed and SS1 monitoring time
● The SBR function does not start until a definable time (SS1 delay) has elapsed. To begin
● Once the motor speed has reached a definable threshold ("standstill monitoring"), the
Switch on the motor
● To switch the motor on again, you have to first deactivate SS1 and then specify the ON
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using the SBR function.
parameters for this purpose.
with, the inverter monitors the speed setpoint that applied when SS1 was selected.
inverter safely switches off the motor torque (STO) and the motor coasts to a standstill.
Standstill monitoring, which is set via parameters P1226 and P1227, is also active. The
motor is always switched off immediately with STO irrespective of how motor standstill is
first detected.
command again.
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA