Table of Contents
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Function
Name
code
PID output
P09.03
feature selection
Proportional
P09.04
gain (Kp)
P09.05 Integral time (Ti)
Differential time
P09.06
(Td)
Sampling cycle
P09.07
(T)
PID control
P09.08
deviation limit
Function Parameters
Detailed instruction of parameters
Note: The reference channel and the feedback channel can
not coincide, otherwise, PID can not control effectively.
0: PID output is positive. When the feedback signal
exceeds the PID reference value, the output frequency of
the inverter will decrease to balance the PID. For example,
the strain PID control during wrapup
1: PID output is negative. When the feedback signal is
stronger than the PID reference value, the output frequency
of the inverter will increase to balance the PID. For
example, the strain PID control during wrapdown
The function is applied to the proportional gain P of PID
input. P determines the strength of the whole PID adjuster.
The parameter of 100 means that when the offset of PID
feedback and reference value is 100%, the adjusting range
of PID adjustor is the Max. Frequency (ignoring integral
function and differential function).
Higher value can reach the target control value faster, but it
may cause oscillation
The setting range: 0.00~100.00
This parameter determines the speed of PID adjustor to
carry out integral adjustment on the deviation of PID
feedback and reference. When the deviation of PID
feedback and reference is 100%, the integral adjustor
works continuously after the time (ignoring the proportional
effect and differential effect) to achieve the Max. Frequency
(P00.03) or the Max. Voltage (P04.31). Shorter the integral
time, stronger is the adjustment. If the value is reduced,
response will be faster but setting too low may lead to
controller oscillation.
Setting range: 0.00~10.00s
Set the output value to the variation of the error. If
differential time is set to 0.01 s and the percentage variation
of error per 1s is 100%, 1% per 10 ms is output.
Setting range: 0.00~10.00s
This parameter means the sampling cycle of the feedback.
The modulator calculates in each sampling cycle. The
longer the sapling cycle is, the slower the response is.
Setting range: 0.001~10.000s
The output of PID system is relative to the maximum deviation of
the close loop reference. As shown in the diagram below, PID
adjustor stops to work during the deviation limit. Set the function
properly to adjust the accuracy and stability of the system.
Default
Modify
value
0
○
1.00
○
0.10 s
○
0. 00 s
○
0.100 s
○
0.0 %
○
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