TECHTOP TD20 Series Product Manual page 72

TD20 Series VFD
Function
Name
code
Sampling
P09.07
cycle(T)
PID control
P09.08
deviation limit
Output upper
P09.09
limit of PID
Output lower
P09.10
limit of PID
Feedback
offline
P09.11
detection
value
Feedback
P09.12 offline
detection time
Detailed instruction of parameters
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 lasting time exceeds the
set value in P09.12, the VFD will report "PID feedback
offline fault" and the keypad will display PIDE.
Output frequency
P09.11
Setting range of P09.11: 0.0–100.0%
Feedback value
Bias limit
t1<t2, so the VFD
continues to work
t2=P09.12
PIDE
t2
t1
Fault output PIDE
In running
-70-
Function Parameters
Default
value
0.100s
0.0%
T
T
100.0%
0.0%
0.0%
1.0s
T
Modify
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