Siemens SINAMICS G120 Operating Instructions Manual page 224

Advanced commissioning
6.13 Motor holding brake
Procedure
1. Set p1215 = 1.
The "Motor holding brake" function is enabled.
2. Check the magnetizing time p0346.
The magnetizing time must be greater than zero. The inverter assigns the magnetizing time
when it is being commissioned.
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 suddenly
– If the motor waits too long before accelerating after the motor holding brake has opened,
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:
– U/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 holding
– If the motor waits too long before switching off after the motor holding brake has closed,
The "Motor holding brake" function has been commissioned.
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against the closed motor holding brake.
Set p1216 larger.
reduce p1216.
For applications involving a pulling load, e.g. lifting gear/crane, if p1216 is too long, then
the load can briefly sag/sink after the motor holding brake is opened. If you reduce
p1216, then the amount that the load sags/sinks is reduced.
Increase p1310 in small steps.
Increase p1351 in small steps.
Increase p1475 in small steps.
brake closes.
Set a larger value for p1217.
reduce p1217.
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG