Chapter 4 Description of Parameters | VFD-VJ
4-24
Speed bandwidth
Control mode
FOCPG FOCPM
Factory setting: 20
Settings 0~40Hz
Set the speed response. The larger value indicates the faster response.
Speed Bandwidth 2
Control mode
FOCPG FOCPM
F
actory setting: 20
Settings
0～40Hz
Speed bandwidth 3
Control mode
FOCPG FOCPM
F
actory setting: 20
Settings
0～40Hz
Set the speed response. The larger value indicates the faster response.
Pressure feedback filtering time PS
Pressure feedback filtering time PI
Pressure feedback filtering time QI
Control mode
VF FOCPG FOCPM
Factory setting: 0.000
Settings 0.000~1.000 seconds
Noises may reside in the analog input signals of the control terminals PS, PI, and QI. The noise may affect
the control stability. Use an input filter to eliminate such noise.
If the time constant is too large, a stable control is obtained with poorer control response. If it is too small, a
fast response is obtained with unstable control. If the optimal setting is not known, adjust it properly
according to the instability or response delay.
Percentage for the pressure command value (Max)
Control mode
VF FOCPG FOCPM
Factory setting: 56.0
Settings 0.0~100.0%
Percentage for the pressure command value (Mid)
Control mode
VF FOCPG FOCPM
Factory setting: 28.0
Settings 0.0~100.0%
Percentage for the pressure command value (Min)
Control mode
VF FOCPG FOCPM
Factory setting: 0.0
Settings 0.0~100.0%
When setting maximum value for the pressure command (Pr.00-07) and maximum pressure feedback value
(Pr.00-08), Percentage for the pressure command value (Pr.00-14) and (Pr.00-15) will be revised as well; it
cannot be set when pressure command is higher than pressure feedback value.
Pr.00-07 can be changed when the drive is in operation, but it can be set when Pr.00-07 is lower than
Pr.00-08.
To set these parameters, it is necessary to set Pr.00-09 = 1.
Set Pr.00-04 = 12 for PI input voltage.
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