Siemens SINAMICS G120 - Page 190

5. You only have to set the filter time when the hysteresis ② is enabled.
6. You only have to set the hysteresis when hysteresis is enabled ②.
You have set the SSM function.
The SSM function is active immediately after commissioning has been completed.
SSM without hysteresis
Speed monitoring
● When the motor is switched on, the inverter compares the load speed with the speed limit.
6SHHG
6SHHGOLPLW
1HJDWLYHVSHHGOLPLW
6SHHGEHORZWKHOLPLW
YDOXH
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660
660
W
W
W
Figure 5-29 Time response of the SSM safety function without hysteresis
Parameter Description
p9501.00 1 signal: Enable extended functions.
0 signal: Disable extended functions.
p9501.16 1 signal: Enable hysteresis and filtering
0 signal: Disable hysteresis and filtering
p9546 Speed limit (Factory setting: 20 rpm)
r9714[0] Load-side speed actual value [rpm]
Electrical speed of the motor. For induction motors, the mechanical speed is obtained
from the electrical speed and slip.
r9722.15 1 signal: Absolute value of the speed is lower than the speed limit
SSM with hysteresis
If you wish to monitor speeds that are very close to the speed limit, you may find it useful to
set the hysteresis.
Commissioning
5.12 Setting extended functions
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
190 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD