User Manual

Chapter 7 Explanation of Functions

7 - 24

7.5.4 Start frequency setting

The start frequency setting function allows you to specify the inverter output frequency that the inverter

initially outputs when an operation command is input.

Use this function mainly to adjust the start torque.

If the start frequency (b082) is set too high, the inverter will start the motor with a full voltage, which will

increase the start current. Such status may trigger the overload restriction operation or make the inverter

prone to easily tripping because of the overcurrent protection.

Item Function code Range of data Description

Start frequency

adjustment

b082 0.01 to 9.99 (Hz) Setting of the start frequency

7.5.5 Reduced voltage start function

The reduced voltage start function enables you to make the inverter increase the output voltage gradually

when starting the motor.

Set a small value for the reduced voltage start selection (b036) if you intend to increase the start torque.

On the other hand, setting a small value will cause the inverter to perform full-voltage starting and to easily

trip because of overcurrent.

Item Function code Range of data Description

Reduced voltage start

selection

b036

00 Disabling the reduced voltage starting

01 to 250

01: Short (about 4 ms)

250: Long (about 1000ms)

00 01 250

･･･

Reduced Voltage Start

b036

Start frequency

b082

Output frequency

Output voltage

Output frequency

Output voltage

b082