Pid Control Operation; Types Of Pid Control - Omron SYSDRIVE 3G3MV User Manual

Advanced Operation

6-3-2 PID Control Operation

·To simply explain the operation of proportional control, integral control, and derivative
control, the following graph is used to show that the output frequency changes while
the deviation (i.e., the difference between the target value and feedback value) is con-
stant.
·Proportional (P) Control: The output is in proportion to the deviation. The deviation
cannot be set to 0 with proportional control only.
·Integral (I) Control: The output is the integral value of the deviation. This control
method makes the feedback value coincide with the target value effectively but cannot
catch up with a rapid change in deviation.
·Derivative (D) Control: The output is the derivative value of the deviation. This control
method quickly responds to a rapid change in deviation.
·PID Control: By combining the merits of the above control functions, ideal control is
possible.

6-3-3 Types of PID Control

·Two types of PID control are available to the 3G3MV Inverter. Normally, feedback-
value integral PID control is used.
6-14
Deviation
Control
value
Derivative
(D) control
Chapter 6
Time
PID control
Integral
(I) control
Proportional (P)
control
Time