Adjustment Parameter

Name

b6-01

Dwell Reference at Start

b6-02

Dwell Time at Start

H2-xx = 5

Frequency Detection 2
Figure 1. Dwell Function at Start
Note:

  • If the mechanical operation of the holding brake is slow, use the Dwell Function at Start to prevent brake grinding (friction). Accelerate after the brake is fully open.

  • When you use V/f Control and Open Loop Vector Control modes, set b6-01 [Dwell Reference at Start] > Frequency Detection 2 (brake open frequency).

  • If the motor torque is not sufficient during start up, use the DC Inject Braking function to secure the motor current (torque) before you start the motor.

    • b2-02 [DC Injection Braking Current] recommended setting: 50% to 80% (V/f Control or Open Loop Vector Control)

    • b2-03 [DC Inject Braking Time at Start] recommended setting: 0.2 s to 0.5 s