E6581158
F-47
6
3) Setting PID control
Set "
" in the extended parameter
H
(PID control)
(1) Set
parameters
CEE
(acceleration time), and
FGE
(deceleration time) to their minimum values (0.1
sec.).
(2)
To limit the output frequency, set parameters
WN
(upper limit frequency) and
NN
(lower limit
frequency). If process quantities are set from the operation panel, however, the process quantity setting
range will be limited by the settings of
WN
and
NN
.
4) Adjusting the PID control gain level
Adjust the PID control gain level according to the process quantities, the feedback signals and the object to
be controlled.
The following parameters are provided for gain adjustment:
Parameter
Setting range
Default setting
H
(P-gain)
0.01-100.0
0.30
H
(I-gain)
0.01-100.0
0.20
H
(D-gain)
0.00-2.55
0.00
H
(P-gain adjustment parameter)
This parameter adjusts the proportional gain level during PID control. A correction value proportional to
the particular deviation (the difference between the set frequency and the feedback value) is obtained
by multiplying this deviation by the parameter setting.
A larger P-gain adjustment value gives faster response. Too large an adjustment value, however,
results in an unstable event such as hunting.
Slow response (
H
= Small gain)
Process quantity setting value
Time
Feedback amount
Fast response
(
H
= Large gain)
