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14.12.4.6
Setting the SS1 delay time
Description
Select the SS1 delay time so that before the torque is shut down with STO, the motor can
completely ramp down along the OFF3 ramp, and if parameterized, the motor holding brake can
close. The OFF3 ramp-down time must be oriented to the actual braking capacity of the system
or machine.
Use the following procedure to select the SS1 delay time:
With parameterized motor holding brake
SS1 delay time (p9556) ≥ OFF3 ramp-down time (p1135) + pulse cancellation delay time
(p1228) + motor holding brake closing time (r1217)
Without parameterized motor holding brake
SS1 delay time (p9556) ≥ OFF3 ramp-down time (p1135) + pulse cancellation + delay time
(p1228)
14.12.5
Motion monitoring
14.12.5.1
Safely-Limited Speed (SLS)
Overview
Figure 14-230
With Safely-Limited Speed (SLS), the converter monitors the motor speed. The converter
stops the motor if the motor speed is too high.
Description of function
Safely-Limited Speed (SLS) has 4 independent SLS limit values that can be switched between
during operation. If the motor speed violates the currently selected SLS limit value, the converter
initiates a set stop response.
This figure illustrates the change from a higher SLS limit value to a lower SLS limit value. For
the change from a lower SLS limit value to a higher SLS limit value, there is no SLS delay
time. The new SLS limit value is active immediately.
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
Overview SLS
Functions
14.12 Safety Integrated
669
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