Siemens sinamics G120 Operating Instructions Manual page 284

Advanced commissioning
6.7 Application-specific functions
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.
Table 6- 42
Parameter
p1215 = 1
p1216
p1217
r0052.12
284
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.
Setting the control logic of the motor holding brake
Description
Enable motor holding brake
0 Motor holding brake locked (factory setting)
1 Motor holding brake just like the sequence control
2: Motor holding brake permanently open
3: Motor holding brake just like the sequential control, connected via BICO
Motor holding brake opening time (factory setting 0.1 s)
p1216 > braking signal relay runtimes + brake release time
Motor holding brake closing time (factory setting 0.1 s)
p1217 > braking signal relay runtimes + brake closing time
"Open motor holding brake" command
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
Converter with CU250S-2 Control Unit