Toshiba Q9 Plus ASD, Installation & Operation Manual

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E6581611
F-81
6
Frequency agreement detection range ( f167 ) can also be set.
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 process value : The parameter
f367 (Process upper limit), f368 (Process lower
limit)
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 process quantities, the feedback signals 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 process 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.
Fast response
(
f362 =Large gain)
Slow response
(
f362 =small gain)
Process value
Output frequency
Time