User Manual of EM730 Series Inverter F04.00=1: start with speed tracking The inverter is smoothly started from the current rotation frequency of the motor, following the speed tracking (size and direction). frequency. To fully establish the magnetic flux during the motor start, the starting frequency In order to ensure the motor torque during the start, please set the appropriate starting should be maintained for some time. The starting frequency F04.01 is not limited by the lower frequency limit. reverse rotation. If the inverter is started immediately, it may be subject to overcurrent Before the inverter is started, the motor may be in the status of low-speed running or protection.
In order to avoid such protections, 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- 17.
198 Function code Function code name Parameter description Unit Default setting Attribute Mailing address F04.01 Start frequency 0.00 ~ 10.00 Hz 0.00 〇 0x0401 F04.02 Start frequency hold time 0.00 ~ 60.00, 0.00 is invalid s 0.00 〇 0x0402 Function code Function code name Parameter description Unit Default setting Attribute Mailing address F04.03 Starting current of DC braking 0.0 ~ 100.0 (100.0 = Rated current of motor) % 100.0 〇 0x0403 F04.04 Starting time of DC braking 0.00 ~ 30.00 s 0.00 〇 0x0404 When multiple motors are driven by a single inverter, this function can be applied.
Function code Function code name Parameter description Unit Default setting Attribute Mailing address F04.06 Pre-excitation current 50.0 ~ 500.0 (100.0 = no-load current) % 100.0 〇 0x0406 F04.07 Pre-excitation time 0.00 ~ 10.00 s 0.10 〇 0x0407