Siemens SINAMICS G120C Operating Instructions Manual page 245

3. Find out the mechanical opening and closing times from the technical data of the motor
holding brake.
– Depending on the brake size, brake opening times lie between 25 ms and 500 ms.
– Depending on the brake size, brake closing times lie between 15 ms and 300 ms.
4. Set the following parameters in the inverter suitably for the mechanical opening and
closing times of the motor holding brake:
– p1216 > mechanical opening time of the motor holding brake
– p1217 > mechanical closing time of the motor holding brake
5. Switch on the motor.
6. Check the acceleration behavior of the drive immediately after the motor has been
switched on:
– If the motor holding brake opens too late, the inverter will accelerate the motor
– If the motor waits too long before accelerating after the motor holding brake has
7. If the load sags after switching on the motor, then you must increase the motor torque
when opening the motor holding brake. Depending on the control mode, you must set
different parameters:
– V/f control (p1300 = 0 to 3):
– Vector control (p1300 ≥ 20):
8. Switch off the motor.
9. Check the behavior of the drive immediately after the motor has been switched off:
– If the motor holding brake closes too late, the load briefly sags before the motor
– If the motor waits too long before switching off after the motor holding brake has
You have commissioned the "Motor holding brake" function.
SINAMICS G120C converter
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
suddenly against the closed motor holding brake.
Set p1216 larger.
opened, reduce p1216.
Increase p1310 in small steps.
Increase p1351 in small steps.
Increase p1475 in small steps.
holding brake closes.
Set a larger value for p1217.
closed, reduce p1217.
Advanced commissioning
6.7 Application-specific functions
241