Advanced commissioning
6.15 Motor control
Converter with the control units CU240D-2
204
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
If you use encoderless vector control with a pulling load, then the following settings are
required:
●
Set the following parameters:
Par.
Explanation
p1750
Motor model configuration
Bit 07 = 1
Use speed switchover limits that are less sensitive to external effects
p1610
Static torque setpoint (encoderless) (Factory setting: 50 %)
Set a value which is higher than the maximum load torque that occurs.
●
When opening the motor holding brake, enter a speed setpoint > 0.
For speed setpoint = 0, and with the motor holding brake open, the load drops because
the induction motor rotates with the slip frequency as a result of the pulling load.
●
Set the ramp-up and ramp-down times
≤
10 s in the ramp-function generator.
●
If, in quick commissioning, you have selected application class Dynamic Drive Control
then set p0502 = 1 (technological application: dynamic starting or reversing).