Parameter Group
-236-
0: Straight-line V/f curve
1: Multi-point V/f curve
2: Square V/f curve
3: 1.2-power V/f curve
4: 1.4-power V/f curve
6: 1.6-power V/f curve
8: 1.8-power V/f curve
10: V/f complete separation mode
11:V/f half separation mode
Description
0: Straight-line V/f curve
Under the rated frequency, the output voltage of the AC drive changes linearly with the output
frequency. This curve is applicable to general mechanical drive applications such as large-inertia fan
acceleration, punch presses, centrifuges, and water pumps.
1: Multi-point V/f curve
The range of the frequency points is 0.00 Hz to the rated motor frequency. The range of the voltage
points is 0.0% to 100.0%, which corresponds to the range of 0 V to the rated motor voltage. The multi-
point V/f curve references are typically determined based on load characteristics of the motor. Ensure
that the following conditions are met: F3-03 ≤ F3-05 ≤ F3-07.
2: Square V/f curve
Under the rated frequency, the output voltage changes with the output frequency of the AC drive
according to the 2-power curve. This curve is applicable to applications with light loads that seldom
change, such as fans and water pumps.
3: 1.2-power V/f curve
Under the rated frequency, the output voltage changes with the output frequency of the AC drive
according to the 1.2-power curve.
4: 1.4-power V/f curve
Under the rated frequency, the output voltage changes with the output frequency of the AC drive
according to the 1.2-power curve.
6: 1.6-power V/f curve
Under the rated frequency, the output voltage changes with the output frequency of the AC drive
according to the 1.2-power curve.
8: 1.8-power V/f curve
Under the rated frequency, the output voltage changes with the output frequency of the AC drive
according to the 1.2-power curve.
10: V/f complete separation mode
The output frequency and output voltage of the AC drive are independent of each other. The output
frequency is determined by the frequency source, and the output voltage is determined by voltage
source for V/f separation. This curve is generally applicable to scenarios such as motor torque control.
11: V/f half separation mode
In this mode, the voltage (V) is proportional to the frequency (f). The relationship between V and f can
be set by the voltage source, and it is also related to the rated motor voltage and rated motor
frequency in group F1. Assuming that the voltage source input is X (X ranges from 0% to 100%), the
relationship between V and f is as follows: V/f = 2 x X x (Rated motor voltage)/(Rated motor
frequency).
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