Parameter Description
VD300 Series Inverter User Manual
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5: MAX(AI1, AI2)
6: MIN(AI1, AI2)
7: HS Pulse input setting
8: Communication setting
9: Internal current feedback
Set feedback source of PID close loop control, feedback input channel must be external input and
cannot share the same channel with PID given channel. Otherwise it result PID control Disabled.
P08.04
PID Output Feature
Selection
0: PID output positive feature
1: PID output negative feature
0
○
PID output positive feature: When PID feedback is smaller than the PID command, deviation is
positive, it needs to increase inverter output frequency to balance the PID.
PID output negative feature: When PID feedback is smaller than the PID command, deviation is
positive, it needs to reduce inverter output frequency to balance the PID.
The function code and DI function (the reverse of PID action direction) do EO logic as the actual PID
action direction.
P08.05
PID Feedback Display
Coefficient
0.00~655.35 (Users defined units
)
1.00
○
PID feedback display coefficient: PID command value 100% (feedback meter full range)
corresponding physical quantity in PID control system. Such as constant pressure water supply
system, the pressure meter full range 30.0MPa, the PID feedback display coefficient set as 30.0, at
this stage the status display function code PID setup P28.22, PID feedback P31.18 corresponding
value unit is the physical unit of 0.1MPa.
P08.06
Proportional Gain 1
0.00~100.00
40.0
○
P08.07
Integral Time 1
0.00: Disabled integral
0.01s~10.00s
0.50s
○
P08.08
Differential Time 1
0.000s~10.000s
0.000s
○
P08.09
Proportional Gain
2
0.00~100.00
40.00
○
P08.10
Integral Time
2
0.00: Disabled integral
0.01s~10.00s
0.50s
○
P08.11
Differential Time
2
0.000s~10.000s
0.000s
○
In order to meet process PID control in complicate control application, the inverter has built-in
2groups separate PID control parameter.
Proportional gain (Kp): It decides the adjustment intensity of the whole PID regulator. The higher the
P is, more powerful the adjustment intensity is. When this parameter is 100, indicating the deviation
between PID feedback quantity and the reference quantity is 100%, the adjustment amplitude of the
PID regulator on the output frequency command is maximum frequency (the integral and differential
functions are neglected).
Integration time (Ti): It decides the PID regulator integration adjusting speed of the deviation which
between the PID feedback quantity and the reference quantity. Integration time is the time within
which the integration regulator (the proportional and differential functions are neglected) performs
continuous adjustment and the adjustment quantity reaches maximum frequency (P00.07) when the
deviation between the PID feedback quantity and reference quantity is 100%. The shorter the
integration time is, more powerful the adjustment intensity is.
Differential time (Td): It decides the intensity of PID regulator adjusting the change rate of deviation
between the PID feedback quantity and the reference quantity. Differential time is the time within
Summary of Contents for VD300 Series
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