User Manual of A90 Series Inverter Fig. 7-17 DC Braking Process for Start Fig. 7-18 DC Braking Process for Stop In the presence of heavy loads, the motor cannot be stopped completely through normal deceleration due to inertia. You can extend the duration of DC braking for stop or increase the current of DC braking for stop to stop the motor from rotating. When the magnetic flux braking is valid (F04.24>100), the motor can be quickly slowed down by increasing its magnetic flux, and the electric energy can be converted into thermal energy during motor braking. Flux braking may lead to quick deceleration, but the output current may be high.
The flux braking intensity (F04.24) can be set restriction and protection to avoid damage to the motor. If flux braking is not applied, the deceleration time will be extended but the output current will be low. The start after the fault or free stop may be set by default according to the F04.00 setting (F04.26=0), or set to the speed tracking start (F04.26=1). For the stop mode, see the description of the function code F04.00. F04.27=0 : not confirmed The running terminal (RUN or F/R) is closed, F00.03 is set to 0 or 1, and the terminal is powered on during start/stop or directly run once enabled by switching the start/stop mode. F04.27=1 :
confirmed The running terminal is closed, F00.03 is set to 0 or 1, and the terminal is powered on 167 Function Function code Default Parameter description Unit Attribute code name setting F04.24 Flux braking gain 100-150 (100: no flux braking) 100 ○ Function Function code Default Parameter description Unit Attribute code name setting F04.26 Start mode after failure/free stop 0: start according to F04.00 setting mode 1: start of speed tracking 0 ○ Function Default Function code name Parameter description Unit Attribute code setting F04.27 Second confirmation of terminal start command 0: Not required for confirmation 1: to be confirmed 0 ○