Siemens CU240B-2 - Page 296

Advanced commissioning
6.7 Application-specific functions
Converter with the CU240B-2 and CU240E-2 Control Units
296 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
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):
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.
Table 6- 42 Setting the control logic of the motor holding brake
Parameter
Description
p1215 = 1
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
p1216
Motor holding brake opening time
(factory setting 0.1 s)
p1216 > braking signal relay runtimes + brake release time
p1217
Motor holding brake closing time
(factory setting 0.1 s)
p1217 > braking signal relay runtimes + brake closing time
r0052.12
"Open motor holding brake" command