Setting Ss1 - Siemens SINAMICS G120 Function Manual

Commissioning
5.7 Setting extended functions
5.7.5

Setting SS1

Monitoring modes
You can select between two different monitoring modes of the SS1 function.
Braking ramp monitoring
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Using the SBR (Safe Brake Ramp) function,
the inverter monitors whether the motor speed
decreases.
The gradient of the SBR function can be
adjusted. The SBR function only starts after
the "Delay time for braking ramp". The SBR
function starts with the speed setpoint that
was applicable when SS1 was selected.
When the standstill monitoring threshold is
fallen below, the inverter safely switches off
the motor torque (STO).
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Acceleration monitoring
The inverter monitors the motor speed using
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the SAM (Safe Acceleration Monitor) function.
The inverter prevents the motor from re-
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accelerating by continuously adjusting the
monitoring threshold to the decreasing speed.
The inverter reduces the monitoring threshold
•
until the "Shutdown speed" has been
reached.
The inverter safely switches off the motor
•
torque (STO) if one of the following conditions
is fulfilled:
– The inverter detects that the motor is
stationary.
– The maximum time until the torque is
switched off has expired.
Function Manual, 04/2014, FW V4.7, A5E34261271B AA