Advanced commissioning
7.8 Application-specific functions
Converter with control units CU250D-2
246
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
Procedure
To commission the "motor holding brake" function, proceed as follows:
1.
Set p1215 = 1.
The "Motor holding brake" function" is enabled.
2.
Check the magnetizing time p0346; the magnetizing time is pre-assigned during
commissioning and must be greater than zero.
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 against the closed motor holding brake.
Set p1216 larger.
–
If the motor waits too long before accelerating after the motor holding brake has
opened, reduce p1216.
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 operation (p1300 = 0 to 3):
Increase p1310 in small steps.
Increase p1351 in small steps.
–
Vector control (p1300 ≥ 20):
Increase p1475 in small steps.
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 brake closes.
Set a larger value for p1217.
–
If the motor waits too long before switching off after the motor holding brake has
closed, reduce p1217.
You have commissioned the "Motor holding brake" function.
