User Manual of A90 Series Inverter reverse rotation. If the inverter is started immediately, it may have an overcurrent fault. In order to avoid such faults, it is necessary to perform DC braking to stop the motor and then make the motor run in the set direction to the set frequency before the inverter is started. When F04.03 is set to different values, DC braking torques can be enabled. F04.04 is used to set the time to enable DC braking. The inverter will start running once the set time is up. If F04.04=0.00, DC braking is invalid during start. ★ DC braking is started as shown in Fig. 7. When multiple motors are driven by a single inverter, this function can be applied.
set pre-excitation current F04.06 and the set pre-excitation time F04.07 is up. If the The inverter will start running after the magnetic field is established according to the pre-excitation time is set to 0, the inverter will be started directly without pre-excitation. The pre-excitation current F04.06 is the percentage relative to the rated no-load current of the motor. to speed tracking according to the setting of F04.08 during the start.
For quicker tracking to When the speed tracking start mode (F04.00=1) is selected, the inverter will be subject 162 Function Function code Default Parameter description Unit Attribute code name setting F04.06 Pre-excitation current 50.0-500.0 (100.0 = no-load current) % 100.0 ○ F04.07 Pre-excitation time 0.00 - 10.00 s 0.10 ○ Function Function Default Parameter description Unit Attribute code code name setting F04.08 Speed tracking mode Ones place: Tracking start frequency 0: maximum frequency 1: stop frequency 2: power frequency Tens place: Selection of search direction 0: search only in command direction 1:
Search in the opposite direction if the speed cannot be found in the command direction 0 ○