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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)
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