Chapter 4
Explanation of Functions
4-42
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
Function code
Range of data
Description
Start frequency
adjustment
b082
0.10 to 9.99 (Hz)
Setting of the start frequency
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.
When you select sensorless vector control (03:SLV), 0Hz-range sensorless vector
control (04:0Hz-SLV) or vector control with sensor (05:V2) at the V/F characteristic
curve selection(A044/A244/A344), this function is unavailable.
Item
Function code
Range of data
Description
Reduced voltage start
selection
b036
00
Disabling the reduced voltage starting
01 to 255
01: Short (about 6 ms)
255: Long (about 1.53 s)
b082: Start frequency adjustment
Related code
b036: Reduced voltage start selection
b082: Start frequency adjustment
Related code
FW
Output frequency
Output voltage
b082
00
01
06
・・・
Reduced Voltage Start
b036
Start frequency
b082
FW
Output frequency
Output voltage
Summary of Contents for SJ700D-004L
Page 16: ...Contents Appendix Appendix A 1 Index Index Index 1 ...
Page 44: ...Chapter 2 Installation and Wiring 2 23 Memo ...
Page 70: ...Chapter 3 Operation 3 25 Memo ...
Page 248: ...Chapter 5 Error Codes 5 11 Memo ...
Page 256: ...Chapter6 Maintenance and Inspection 6 7 Memo ...