6. Description of Parameters
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6
6.5 Control Performance
6.5.1 V/F Curve
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Linear, Multi-point and Square V/F Curve
Function Code Parameter Name Setting Range Default
F3-00
V/F curve setting 0: Linear V/F
1: Multi-point V/F
2: Square V/F
10: V/F separation
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0
F3-01
Torque boost ¿[HGERRVW
0.1% to 30%
Model
dependent
F3-02
Cut-off frequency of torque
boost
0.00 Hz to max. frequency 50.00 Hz
F3-03
Multi-point V/F frequency 1 0.00 Hz to F3-05 0.00 Hz
F3-04
Multi-point V/F voltage 1 0.0% to 100.0% 0.0%
F3-05
Multi-point V/F frequency 2 F3-03 to F3-07 0.00 Hz
F3-06
Multi-point V/F voltage 2 0.0% to 100.0% 0.0%
F3-07
Multi-point V/F frequency 3 F3-05 to rated motor
frequency (F1-04)
0.00 Hz
F3-08
Multi-point V/F voltage 3 0.0% to 100.0% 0.0%
1. General constant-torque linear V/F curve
Figure 6-36 General constant-torque linear V/F curve
Output frequency
Output voltage
F1-02
(Rated voltage)
F1-01
(Rated frequency)
F3-01
(Torque boost)
Output voltage and output frequency change linearly when below rated frequency. It is
applicable to general mechanical drive applications such as conveyors where the load
torque is constant against the speed range.
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