E6581531
F-42
6
6.22.2 Prevention of motor current oscillation at light load
H
: Motor oscillation control
[Parameter setting]
Title
Function
Adjustment range
Default setting
H
Motor oscillation control
0:Disabled, 1:Enabled(Low gain)
2:Enabled(Middle gain)
3:Enabled(High gain)
6.22.3 Max output voltage modulation rate
H
: Max output voltage modulation rate
[Parameter setting]
Title
Function
Adjustment range
Default setting
H
Max output voltage modulation rate
0:Standard, 1:100%
2:102.5%, 3:105%
6.23
Fine adjustment of frequency setting signal
H
: VI/II input bias
H
: VI/II input gain
H
: RR/S4 input bias
H
: RR/S4 input gain
H
: RX input bias
H
: RX input gain
H
: Optional AI1 input bias
H
: Optional AI1 input gain
H
: Optional AI2 input bias
H
: Optional AI2 input gain
• Function
These parameters are used to fine adjust the relation between the frequency setting signal input through
the analog input terminal and the output frequency.
Use these parameters to make fine adjustments after making rough adjustments using the parameters
H
~
H
.
The figure below shows the characteristic of the frequency setting signal input through the analog input terminal and
that of the output frequency.
Output frequency
[Hz]
Maximum frequency
H
,
H
H
,
H
H
0
H
,
H
,
H
H
,
H
Factory default
setting
Large
Small
Small
Large
0
％
100
％
0V 10Vdc
4mA 20mAdc
Frequency setting signal (Analog input terminal)
• Function
When a motor is in unstable with light load, this parameter can change the motor gain to make motor
condition stable. First set
H
=
and check the motor condition. Please set
to
in case motor
needs more stable condition.This parameter is effective only in V/F control mode (
RV
=
,
,
)
• Function
In the case that Inverter output voltage drops and output current exceeds motor rating current at the frequency
higher than base frequency, Change this parameter setting and check whether the output current is reduced.
