Unitronics UMI-B1 UL Series Operation Manual page 82

UMI-B1 UL Series Inverter
Function
Name
code
Differential
P09.06
time(Td)
Sampling
P09.07
cycle(T)
PID control
P09.08
deviation
limit
Detailed instruction of parameters
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 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.
80
Function parameters
Default
Modify
value
○
0.00s
○
0.100s
○
0.0%