User Manual of EM730/EM730E Series Inverter When multiple motors are driven by a single inverter, this function can be applied. The inverter will start running after the magnetic field is established according to the set pre-excitation current F04.06 and the set pre-excitation time F04.07 is up. If 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. speed tracking according to the setting of F04.08 during the start.
For quicker tracking to the When the speed tracking start mode (F04.00=1) is selected, the inverter will be subject to current operating frequency of the motor, please select the appropriate mode based on the working conditions. This can be applied when the operating conditions of the motor are completely uncertain (for If the units place of F04.08 is 0, tracking will be performed from the maximum frequency. example, the motor is already rotating when the inverter is powered on). If the units place of F04.08 is 1, tracking will be performed from the stop frequency. This mode is usually applied.
179 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 〇 F04.07 Pre-excitation time 0.00 - 10.00 s 0.10 〇 Function Default Function code name Parameter description Unit Attribute code 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 〇