INVT Goodrive20-EU VFD Series Operation Manual page 89

Goodrive20-EU series VFD
Function
Name
code
Sampling cycle
P09.07
(T)
PID control
P09.08
deviation limit
Upper limit of
P09.09
PID output
Lower limit of
P09.10
PID output
Feedback
P09.11 offline
detection value
Detailed instruction of parameters
If the PID feedback changes 100% during the
time, the adjustment of integral adjustor (ignoring
the proportional effect and differential effect) is
the max. frequency (P00.03) or the max. voltage
(P04.31). Longer the integral time, stronger is the
adjusting.
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.
Reference value
Output frequency
Setting range: 0.0 – 100.0%
These parameters are used to set the upper and
lower limit of the PID adjustor output.
100.0 % corresponds to max. frequency or the
max. voltage of (P04.31)
Setting range of P09.09: P09.10 – 100.0%
Setting range of P09.10: -100.0% – P09.09
Set the PID feedback offline detection value,
when the detection value is smaller than or equal
to the feedback offline detection value, and the
Feedback value
85
Function parameters
Default
value
0.100s
Bias limit
0.0%
T
T
100.0%
0.0%
0.0%
Modify
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