INVT Goodrive 310-UL Series Operation Manual page 98

GD310-UL series VFD
Function
Name
code
Integral time
P09.05
(Ti)
Differential
P09.06
time (Td)
Sampling
P09.07
cycle (T)
PID control
P09.08
deviation limit
range of PID adjustor is the max frequency (ignoring
integral and differential function).
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.
Setting range: 0.00–10.00s
This parameter determines the strength of the
change ratio when PID adjustor carries out integral
adjustment on the deviation of PID feedback and
reference.
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 adjustor operates each sampling
cycle. The longer the sapling cycle is, the slower the
response is.
Setting range: 0.000–10.000s
The output of PID system is the maximum deviation
relative to 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.
Description
-90-
Function parameter
Default
Modify
value
○
0.10s
○
0.00s
○
0.100s
○
0.0%