Omron E5AC-T User Manual

6 Parameters
6 - 36
E5@C-T Digital Temperature Controllers User’s Manual (H185)
These parameters set the PID constants. If auto-tuning is executed, these parameters are set automat-
ically.
p
Proportional Band
The control must be set to 2-PID control.
i
Integral Time
d
Derivative Time
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 correct 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.
* The unit is determined by the setting of the Integral/Derivative Time Unit parameter. The
Proportional Band, Integral Time, and Derivative Time parameters are initialized if the
Integral/Derivative Time Unit parameter is changed.
z Related Parameters
AT Execute/Cancel (Adjustment Level): Page 6-27
Integral/Derivative Time Unit (Advanced Function Setting Level): Page 6-86
PID*Proportional band, PID*Integral time, PID*Derivative time (PID setting level): Page
6-46
Setting
Setting
Parameter Setting range Unit Default
Proportional
Band
Temperature input 0.1 to 999.9 °C or °F8.0
Analog input %FS 10.0
Integral Time * Integral/
Derivative
Time Unit of
1 s
Standard, heating/cooling, or
close position-proportional
control
0 to 9999 Seconds 233
Floating position-proportional
control
1 to 9999
Integral/
Derivative
Time Unit of
0.1 s
Standard, heating/cooling, or
close position-proportional
control
0.0 to 999.9 Seconds 233.0
Floating position-proportional
control
0.1 to 999.9
Derivative
Time *
Integral/Derivative Time Unit of 1 s 0 to 9999 Seconds 40
Integral/Derivative Time Unit of 0.1 s 0.0 to 999.9 Seconds 40.0
See
See

Omron E5AC-T Specifications

General

Brand	Omron
Model	E5AC-T
Category	Temperature Controller
Language	English