WEG CFW-11 Applications Manual page 44

Parameters Description
Figure 3.3 – Brake control operation
Description of the identified moments:
1 – The load forward command is given through the digital input DI1. The motor becomes magnetized, and
voltage and frequency are applied to it. The brake remains closed.
2 – The motor current reaches the P1043 threshold, the brake, however, remains closed because the motor
frequency is below the frequency threshold adjusted in P1041.
3 – The motor current remains greater than or equal to the P1043 threshold, and since the motor frequency
reaches the P1041 threshold, the command to release the mechanical brake through the digital output DO3 is
executed
4 – With the brake released, the load forward remains with the speed reference 1 adjusted in P1031.
Crane Horizontal Motion | 44