E6582175
F-84
6
3) Setting PID control
Set "
" (Process type PID control operation) in the parameter
f360
(PID control)
.
(1) Set parameters
acc
(acceleration time) and
dec
(deceleration time) to the system fitting values.
(2) Please set the following parameters to place limits to the setting value and the control value.
Placing a limit to the PID set value : The parameter
f367
(Upper limit of set value),
f368
(Lower limit of
set value)
Placing a limit to the output frequency : The parameter
ul
(Upper limit frequency ),
ll
(Lower limit
frequency )
Note 4: Assigning the function number 36 (PID control prohibition) to an input terminal. PID control function is
stopped temporarily while the terminal is ON.
4) Adjusting the PID control gain level
Adjust the PID control gain level according to the PID set value, the feedback value and the object to be
controlled.
[Parameter settings]
Title
Function
Adjustment range
Default setting
f362
Proportional gain (P)
0.01 - 100.0
0.30
f363
Integral gain (I)
0.01 - 100.0 (1/ s
-1
)
0.20
f366
Derivative gain (D)
0.00 - 2.55 (s)
0.00
f362
(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 PID set value 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.
PID set value
Output frequency
Time
Fast response
(
f362
=Large
gain)
Slow response
(
f362
=small gain)
Summary of Contents for TOSVERT VF-S15 series
Page 394: ......
