V/f Pattern Settings

The drive uses a V/f pattern to adjust the output voltage relative to the frequency reference.

This product has been preconfigured with 15 voltage/frequency (V/f) patterns. Use E1-03 [V/f Pattern Selection] to select the V/f pattern that is appropriate for the application.

Additionally, one custom V/f pattern is available. Set E1-03 = F [Custom] and then manually set parameters E1-04 to E1-10.

Table 1. Predefined V/f Patterns
Setting Value	Specification	Characteristic	Application
0	Const Trq, 50Hz base, 50Hz max	Constant torque	For general purpose applications. This pattern is used when the load torque is constant without any rotation speed such as that used for linear conveyor systems.
1	Const Trq, 60Hz base, 60Hz max
2	Const Trq, 50Hz base, 60Hz max
3	Const Trq, 60Hz base, 72Hz max
4	VT, 50Hz, 65% Vmid reduction	Derated Torque characteristics	This pattern is used for torque loads proportional to 2 or 3 times the rotation speed, such as is the case with fans and pumps.
5	VT, 50Hz, 50% Vmid reduction
6	VT, 60Hz, 65% Vmid reduction
7	VT, 60Hz, 50% Vmid reduction
8	High Trq, 50 Hz, 25% Vmin boost	High starting torque	This pattern is used when strong torque is required during startup.
9	High Trq, 50 Hz, 65% Vmin boost
A	High Trq, 60 Hz, 25% Vmin boost
B	High Trq, 60 Hz, 65% Vmin boost
C	High Freq, 60Hz base, 90Hz max	Constant output	This pattern is used to rotate motors at greater than 60 Hz. Output voltage is constant when operating at greater than 60 Hz.
D	High Freq, 60Hz base, 120Hz max
E	High Freq, 60Hz base, 180Hz max
F	Custom	Constant torque	Enables a custom V/f pattern by changing E1-04 to E1-13 [V/f Pattern for Motor 1]. The default settings for E1-04 to E1-13 are the same as Setting Value 1 [Const Trq, 60Hz base, 60Hz max].

Note:

When you manually set V/f patterns, note these items:

To set linear V/f characteristics at frequencies lower than E1-06 [Base Frequency], set E1-07 = E1-09 [Mid Point A Frequency = Minimum Output Frequency]. In this application, the drive ignores E1-08 [Mid Point A Voltage].
Set the five frequencies as specified by these rules: Incorrect settings will cause oPE10 [V/f Data Setting Error].

E1-09 ≤ E1-07 < E1-06 ≤ E1-11 ≤ E1-04 [Minimum Output Frequency ≤ Mid Point A Frequency < Base Frequency ≤ Mid Point B Frequency ≤ Maximum Output Frequency]
Setting E1-11 = 0 [Mid Point B Frequency = 0 Hz] disables E1-12 [Mid Point B Voltage]. Ensure that the four frequencies are set according to the following rules;

E1-09 ≤ E1-07 < E1-06 ≤ E1-04
When you use A1-03 [Initialize Parameters] to initialize the drive, it will not reset E1-03.