Fine Adjustment Of Frequency Setting Signal - Toshiba TOSVERT VF-PS1 Instruction Manual

6.22.2 Prevention of motor current oscillation at light load
• Function
When a motor is in unstable with light load, this parameter can change the motor gain to make motor
condition stable. First set
needs more stable condition.This parameter is effective only in V/F control mode (
[Parameter setting]
Title
6.22.3 Max output voltage modulation rate
• 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.
[Parameter setting]
Title
6
6.23

Fine adjustment of frequency setting signal

• 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
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
Maximum frequency
: Motor oscillation control
=
Function
Motor oscillation control
: Max output voltage modulation rate
Function
Max output voltage modulation rate
: VI/II input bias
: VI/II input gain
: RR/S4 input bias
: RR/S4 input gain
: RX input bias
~ .
[Hz]
,
Large
,
0
0％
0V
4mA
Frequency setting signal (Analog input terminal)
and check the motor condition. Please set
Adjustment range
0:Disabled, 1:Enabled(Low gain)
2:Enabled(Middle gain)
3:Enabled(High gain)
Adjustment range
0:Standard, 1:100%
2:102.5%, 3:105%
Large
Small
Factory default
setting
Small
100％
10Vdc
20mAdc
F-42
to in case motor
= , , )
Default setting
Default setting
: RX input gain
: Optional AI1 input bias
: Optional AI1 input gain
: Optional AI2 input bias
: Optional AI2 input gain
, ,
,
E6581531