Chapter 5 Function parameter
105
Ch
ap
ter 5
Three phase 480V
890.0V
Three phase 690V
1300.0V
Remark: The factory defaults are the upper limit value of over voltage protection in frequency
inverter. Only when Fb.02 setting value is smaller than the model’s voltage factory default, the
new parameter setting takes effect. If it is higher than factory default, the factory default will be
the effective value.
Fb.03
Deadband compensation mode
selection
no compensation
0
1
☆
compensation mode 1
1
compensation mode 2
2
Generally do not need to modify this parameter, only when the special requirements to the
output voltage waveform quality is required or when the motor oscillation and other abnormal
happen, you need to try to switch to select a different mode of compensation.The compensation
mode 2 for high-power is recommended.
Fb.04 Current detection compensation
0~100
5
☆
Used to set the inverter's current sensing compensation, if the set value is too large, which
may reduce the control performance. Generally do not need to be modified.
Fb.05
Vector optimization
without PG mode selection
no optimization
0
1
☆
optimization mode 1
1
optimization mode 2
2
Fb.06
Upper limiting frequency
for DPWM switching
0.00Hz~15.00Hz
12.00Hz
☆
Fb.07 PWM modulation manner
asynchronous
0
0
☆
synchronous
1
Only valid for V/F control. Synchronous modulation refers to that the carrier frequency
linearly change with the change of output frequency, in order to ensure the unchanged of their
ratio(carrier to noise ratio), generally it is used when the output frequency is higher, is conducive
to ensure the output voltage quality.
Under the lower output frequency (100Hz) mode, generally the synchronize modulation is not
required, because at the time the ratio of the carrier frequency to the output frequency is relatively
high, the asynchronous modulation has more obvious advantages.
When the operating frequency is higher than 85Hz, the synchronous modulation takes effect,
the fixed mode is the asynchronous modulation below the frequency.
Fb.08 Random PWM depth
PWM Invalid
0
0
☆
PWM carrier frequency random depth
1~
10
By setting Random PWM, the monotonous and shrill motor sound can become softer and
which helps reduce external electromagnetic interference. When Random PWM Depth is set to 0,
Random PWM will be invalid.
It will get different results by adjusting different Random PWM Depths,
Fb.09 Deadband time adjustment
100%~200%
150%
☆
About 1140V voltage setting, the voltage availability will be improved by adjust voltage
setting. Too lower value setting can lead to system instability. So it is not recommended to revise it
for users.
5-2-14.
Extended parameter: FC.00-FC.02
Code
Parameter name
Setting range
Factory
setting
Change
limits
FC.00 Undefined
FC.01
Proportional linkage
coefficient
0.00~10.00
0
☆
When proportional linkage coefficient is 0, proportional linkage function can not
work.According to the setting by proportional linkage, communication address of master (F9.02) is
