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Chapter 4
4.2.33 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.
Specifying "04" (0SLV: 0Hz-range sensorless vector control) or "05" (V2: vector control with sensor) for the V/F
characteristic curve selection (A044) disables the start frequency setting function.
Item
Start frequency
adjustment
Output frequency
Output voltage
4.2.34 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
Reduced voltage start
selection
Output frequency
Output voltage
Reduced Voltage Start
Function code
Range of data
b082
0.10 to 9.99 (Hz)
FW
b082
Function code
Range of data
b036
01 to 255
FW
Start frequency
b082
00
01
b036
Explanation of Functions
Setting of the start frequency
b036: Reduced voltage start selection
b082: Start frequency adjustment
00
Disabling the reduced voltage starting
01: Short (about 6 ms)
255: Long (about 1.53 s)
･･･
06
4-42
Related code
b082: Start frequency adjustment
Description
Related code
Description
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