Omron E5AN-H User Manual page 221

Adjustment Level
p
Proportional Band
i
Integral Time
d
Derivative Time
Function
Setting
See
See
200
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.
Parameter
name
Proportional
Band
Integral Time
Derivative Time
■ Related Parameters
AT execute/cancel (adjustment level): Page 192
PID * proportional band, PID * Integral time, PID * Derivative time (PID setting
level): Page 217
The control must be set to 2-PID
control.
Models
Controllers with Temperature
Inputs: 0.1 to 3,240.0
Analog input: 0.1 to 999.9
Standard, heating/cooling, or posi-
tion-proportional (close) control:
0.0 to 3,240.0
Position-proportional (floating)
control: 0.1 to 3,240.0
0.0 to 3240.0
Section 5-4
Unit Default
°C or °F
8.0
%FS 10.0
Second 233.0
Second 40.0