VD120 Series Inverter User Manual Parameter Description
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115
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FA-03
PID Action Direction
0: Positive action
1: Anti-action
0
○
Positive action: when the feedback signal of PID is less than the quantitative, the output frequency of
inverter is increased. Such as the tension control of the winding situation.
Anti-action: when the feedback signal of PID is less than the quantitative, the output frequency of
inverter is decreased. Such as the tension control of the rolling situation.
This function is influenced by the multi-function terminal PID direction invert (function 33), need to pay
attention in the using.
FA-04
PID Given Feedback
Range
0~65535
1000
○
PID given feedback range is a dimensionless unit for PID given display U0-15 and PID feedback
display U0-16.
The relative value 100.0% of a given feedback of PID corresponding to a given feedback range FA -
04. For example, if the FA - 04 set to 2000, when the PID given 100.0%, PID given show U0-15 is
2000.
FA-05
Proportion Gain Kp1
0.0~100.0
20.0
○
FA-06
Integral Time Ti1
0.01s~10.00s
2.00s
○
FA-07
Differential Time Td1
0.000s~10.000s
0.000s
○
The proportional gain Kp1
Determine the adjusting strength of the PID regulator, the greater the Kp1, the greater the intensity of
regulation. This parameter 100.0 said when PID feedback quantity and give quantitative deviation are
100.0%, PID regulator to adjust the amplitude of output frequency instructions for maximum
frequency.
Integration time Ti1
Determine the intensity of the PID regulator integral regulation. The shorter the integration time, the
greater the intensity of adjustment. Integration time is when the PID feedback quantity and give
quantitative deviation are 100.0%, integral regulator through the time continuous adjustment, adjust
the quantity to reach the maximum frequency.
Differential time Td1
Determine the intensity of the PID regulator to adjust the deviation change rate. The longer the
differential time, the greater the intensity of regulation. Differential time is when the feedback quantity
in the time to change 100.0%, the regulation quantity of dirrerential controller is maximum frequency.
FA-08
PID Reverse Cut-off
Frequency
0.00Hz ~max frequency
0.00Hz
○
In some cases, it is only when the PID output frequency is negative (i.e., frequency converter reverse),
PID is likely to give quantitative and feedback control to the same state, but the high inversion
frequency is not allowed in some situations, FA - 08 used to determine the lower limit of reverse
frequency.
FA-09
PID Deviation Limit
0.0%~100.0%
0.0%
○
When the deviation between the PID quantitative and feedback quantity is less than the FA - 09, PID
stop adjustment action. In this way, the deviation of a given and feedback output frequency is stable
when small, is very effective for some closed-loop control occasions.
FA-10
PID Differential Limiting
0.00%~100.00%
0.10%
○
In PID controller, the effect of differential is more sensitive, easy to cause system oscillation, therefore,
generally limit the effect of differential PID in a smaller range, FA - 10 is used to set the PID differential
output range
Summary of Contents for VD120 Series
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