6.6.3.1
SLS with braking ramp monitoring
Function
When you switch from a higher to a lower speed monitoring level (SLS level), the following
takes place:
1. The inverter brakes the motor.
2. Once the delay time has expired, the inverter monitors the motor speed using the SBR
(Safe Brake Ramp) function.
3. The inverter switches from SBR monitoring to SLS monitoring as soon as one of the
following two conditions is fulfilled:
– The SBR monitoring ramp has reached the value of the SLS monitoring.
This case is shown in the diagram above.
– The load speed has decreased down to the value SLS monitoring and the "delay time
for braking ramp" has expired.
When you switch from one of the lower monitoring level to a higher speed monitoring level,
then the inverter immediately monitors the speed with the higher SLS level.
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Figure 6-28 Switching between different monitoring thresholds
Operation
6.6 Safely Limited Speed (SLS)
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
261
