Manual Settings - Omron E5AR-T User Manual

Section 4 Settings Required for Basic Control

■ Manual Settings

4-36
To set the PID constants manually, set values for the Proportional
Band (P), Integral Time (I), and Derivative Time (D) parameters
Supplement
• If you already know the control characteristics, directly set the PID constants
to adjust control. The PID constants are set in the Proportional Band (P),
Integral Time (I), and Derivative Time (D) parameters.
• I (integral time) and D (derivative time) can be set to 0 to select a propor-
tional action. In the default settings, the Manual Reset Value parameter is
set to 50.0% so that the proportional band is centered on the SP.
Changing P (Proportional Band)
SP
When P is
increased
When P is
SP
decreased
Changing I (Integral Time)
When P is SP
increased
When P is SP
decreased
Changing D (Derivative Time)
SP
When P is
increased
When P is SP
decreased
A slow rise and a longer rec-
tification time will occur, but
there will be no overshoot.
Overshoot and hunting will
occur, but the SP will be
reached quickly and stabi-
lize.
A longer time will be required
to reach the SP.
The rectification time will be
longer, but there is less hunt-
ing, overshooting, and under-
shooting.
Overshooting and under-
shooting will occur.
Hunting will occur.
A quick rise will occur.
Less rectification time for
overshooting and under-
shooting, but fine hunting will
occur spontaneously.
Overshooting and under-
shooting will be larger and
more time will be required to
return to the SP.