
Description of Function Codes
I5300 User Manual
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Group A5: Control Optimization Parameters
F
unction Code
Parameter Name
Setting Range
Default
A5-00
DPWM switchover frequency upper limit
0.00–15.00 Hz
12.00 Hz
This parameter is valid only for V/F control.
It is used to determine the wave modulation mode in V/F control of asynchronous motor.
If the frequency is lower than the value of this parameter, the waveform is 7-segment
continuous modulation. If the frequency is higher than the value of this parameter, the
waveform is 5-segment intermittent modulation.
The 7-segment continuous modulation causes more loss to switches of the AC drive but
smaller current ripple. The 5-segment intermittent modulation causes less loss to switches
of the AC drive but larger current ripple. This may lead to motor running instability at high
frequency. Do not modify this parameter generally.
For instability of V/F control, refer to parameter P3-11. For loss to AC drive and temperature
rise, refer to parameter P0-15.
F
unction Code
Parameter Name
Setting Range
Default
A5-01
PWM modulation mode
0: Asynchronous modulation
1: Synchronous modulation
0
This parameter is valid only for V/F control.
Synchronous modulation indicates that the carrier frequency varies linearly with the change
of the output frequency, ensuring that the ratio of carrier frequency to output frequency
remains unchanged. Synchronous modulation is generally used at high output frequency,
which helps improve the output voltage quality.
At low output frequency (100 Hz or lower), synchronous modulation is not required. This is
because asynchronous modulation is preferred when the ratio of carrier frequency to output
frequency is high.
Synchronous modulation takes effect only when the running frequency is higher than 85 Hz.
If the frequency is lower than 85 Hz, asynchronous modulation is always used.
F
unction Code
Parameter Name
Setting Range
Default
A5-02
Dead zone compensation
mode selection
0: No compensation
1: Compensation mode 1
2: Compensation mode 2
1
Generally, you need not modify this parameter. Try to use a different compensation mode
only when there is special requirement on the output voltage waveform quality or oscillation
occurs on the motor.
For high power AC drive, compensation mode 2 is recommended.
F
unction Code
Parameter Name
Setting Range
Default
A5-03
Random PWM depth
0: Random PWM invalid
1–10
0
Summary of Contents for I5300 Series
Page 8: ......
Page 9: ...1 Safety Information and Precautions ...
Page 16: ...Safety Information and Precautions I5300 User Manual 16 ...
Page 17: ...2 Product Information ...
Page 28: ...Product Information I5300 User Manual 28 ...
Page 29: ...3 Mechanical and Electrical Installation ...
Page 45: ...4 Operation Display and Application Examples ...
Page 78: ...Operation Display and Application Examples I5300 User Manual 78 ...
Page 79: ...5 Function Code Table ...
Page 135: ...6 Description of Function Codes ...
Page 247: ...7 EMC ...
Page 255: ...8 Selection and Dimensions ...
Page 261: ...9 Maintenance and Troubleshooting ...