Function Application
‑568‑
Para.
Function
De
fault
Value Range
Description
F3‑03
Multi‑
point V/f
frequency
1
0.00
Hz
0.00 Hz to F3‑05
‑
F3‑04
Multi‑
point V/f
voltage 1
0.0% 0.0% to 100.0%
F3‑05
Multi‑
point V/f
frequency
2
0.00
Hz
F3‑03 to F3‑07
F3‑06
Multi‑
point V/f
voltage 2
0.0% 0.0% to 100.0%
F3‑07
Multi‑
point V/f
frequency
3
0.00
Hz
F3‑05 to rated
motor frequency
(F1‑04)
F3‑08
Multi‑
point V/f
voltage 3
0.0% 0.0% to 100.0%
Linear V/f curve
The following figure shows a general constant‑torque linear V/f curve.
Figure 3‑37 General constant‑torque linear V/f curve
When the frequency is below the rated level, the output voltage changes linearly with
the output frequency. This curve is applicable to general mechanical drive scenarios
such as large‑inertia fan acceleration, punch presses, centrifuges, and pumps.
Multi-point V/f Curve
The following figure shows a user‑defined multi‑point V/f curve.
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