Chapter 4 Parameters
4-51
01.05
Minimum Output Frequency (Fmin) (Motor 0)
Unit: Hz
Settings 0.10 to 599.00Hz
Factory Setting: 1.50
This parameter sets the Minimum Output Frequency of the AC motor drive. If the frequency
command is greater than this setting, the AC motor drive will accelerate to the frequency
command by the accel./decel. time. If the frequency command is less than this setting, the AC
motor drive will be ready without output voltage.
Please note that unsuitable setting may cause over current to damage motor or trigger the
over current protection.
When Pr.08.04 is set to 1(Operation continues after momentary power loss, speed search
starts with the Master Frequency reference value.), it won’t operate by V/f curve.
Related parameters: Pr.01.01(Maximum Voltage Frequency (Fbase) (Motor 0)),
Pr.01.02(Maximum Output Voltage (Vmax) (Motor 0)), Pr,01.03(Mid-Point Frequency (Fmid)
(Motor 0)), Pr.01.04(Mid-Point Voltage (Vmid) (Motor 0)) and Pr.01.06(Minimum Output
Voltage (Vmin) (Motor 0))
01.06
Minimum Output Voltage (Vmin) (Motor 0)
Unit: V
Settings 115V/230V series 0.1 to 255.0V
Factory Setting: 10.0
460V series
0.1 to 510.0V
Factory Setting: 20.0
This parameter sets the Minimum Output Voltage of the AC motor drive.
If the setting is too large, it may cause over current to damage motor or trigger the over current
protection.
If the setting is too small, it may cause insufficient motor torque.
The settings of Pr.01.01 to Pr.01.06 have to meet the condition of Pr.01.02
Pr.01.04
Pr.01.06 and Pr.01.01
Pr.01.03
Pr.01.05. By this condition, V/f curve is shown in the
following figure.
In vector control mode (Pr.00.10 is set to 1), Pr.01.03, Pr.01.04 and Pr.01.06 are disabled. But
Pr.01.05 is still the minimum output frequency.
The V/f curve of motor 0 to motor 3 can be selected by setting the multi-function input
terminals MI3~MI6 (Pr.04.05 to Pr.04.08) to 27 and 28. To set the voltage and frequency for
each motor, please refer to Pr.01.01~01.06 for motor 0 (factory setting), Pr.01.26~01.31 for
motor 1, Pr.01.32~01.37 for motor 2 and Pr.01.38~01.43 for motor 3.
Related parameters: Pr.01.01(Maximum Voltage Frequency (Fbase) (Motor 0)),
Pr.01.02(Maximum Output Voltage (Vmax) (Motor 0)), Pr,01.03(Mid-Point Frequency (Fmid)
(Motor 0)), Pr.01.04(Mid-Point Voltage (Vmid) (Motor 0)) and Pr.01.05 (Minimum Output
Frequency (Fmin) (Motor 0)).
