Omron E5AN-H

200
Adjustment Level Section 5-4
These parameters set PID control constants. PID constants are automatically
set when AT or ST is executed.
P action: Refers to control in which the MV is proportional to the deviation
(control error).
I action: Refers to a control action that is proportional to the time integral of
the deviation. With proportional control, there is normally an offset
(control error). Proportional action is thus used in combination with
integral action. As time passes, this control error disappears, and
the control temperature (process value) comes to agree with the set
point.
D action: Refers to a control action that is proportional to the time derivative of
the control error. The proportional control and integral control cor-
rect for errors in the control result, and thus the control system is
late in responding to sudden changes in temperature. The derivative
action increases the MV in proportion to the slope of the change in
the temperature as a corrective action.
• The set values are saved in the Proportional Band, Integral Time, and
Derivative Time parameters for the selected PID set.
■ Related Parameters
AT execute/cancel (adjustment level): Page 192
PID * proportional band, PID * Integral time, PID * Derivative time (PID setting
level): Page 217
p Proportional Band
The control must be set to 2-PID
control.
i Integral Time
d Derivative Time
Parameter
name
Models Unit Default
Proportional
Band
Controllers with Temperature
Inputs: 0.1 to 3,240.0
°C or °F8.0
Analog input: 0.1 to 999.9 %FS 10.0
Integral Time Standard, heating/cooling, or posi-
tion-proportional (close) control:
0.0 to 3,240.0
Second 233.0
Position-proportional (floating)
control: 0.1 to 3,240.0
Derivative Time 0.0 to 3240.0 Second 40.0
Function
Setting
See
See