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How to adjust
The PID control function is a control system that matches a feedback value (ie.,
a detected value) to the aimed value. Combining P (Proportional, Bn-14), I
(Integral, Bn-15), and D (Derivated, Bn-16) makes control possible even for a
mechanical system with dead time. The PID control function, using different
detected sensors, can be used for speed, pressure. flow or temperature etc.
applications.
(1) PID control operations.
In order to distinguish the separate PID control operations. The figure below
shown the changes in the control input when the deviation between the target
value and the feed back is held constant.
Fig. 14 PID Control Operations
P Control: A control input proportional to the deviation is output. The deviation
cannot be zeroed by P control alone.
I Control:
A control input which is an integral of the deviation is output. This is
effective for matching the feedback to the target value. Sudden
changes, however, cannot be followed.
D Control: A control input which is an integral of the deviation is output. Quick
response to sudded changes is possible.
PID Control: Optimum control is achieved by combining the best features of P, I, and
D control.
Deviation
Control input
Time
Time
PID control
I control
P control
D control
Содержание 7300PA series
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