Omron E5CN User Manual

172
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.
Note (1) Set “None” as the unit for Controllers with Analog Inputs.
(2) If the settings for RT (robust tuning) are changed, the proportional band
(P), integral time (I), and derivative time (D) will be initiated.
■ Related Parameters
AT execute/cancel (adjustment level): Page 163
p Proportional Band
The control must be set to 2-PID
control.
i Integral Time
d Derivative Time
Function
Setting
Parameter
name
Models Setting range Unit Default
Proportional
Band
Controllers with Thermocouple/
Resistance Thermometer Multi-
inputs
0.1 to 999.9 °C or °F
(See note
1.)
8.0
Controllers with Analog Inputs %FS 10.0
Integral Time 0 to 3999 Second 233
Derivative Time RT is OFF. 0 to 3999 Second 40
RT is ON. 0.0 to 999.9 Second 40.0
See
See

Omron E5CN Specifications

General

Brand	Omron
Model	E5CN
Category	Temperature Controller
Language	English