Omron E5AC-T User Manual page 297

6 Parameters
p
i
d
These parameters set the PID constants. If auto-tuning is executed, these parameters are set automat-
ically.
P
action:
Setting
I
action:
D
action:
• The set values are saved in the Proportional Band, Integral Time, and Derivative Time
parameters for the selected PID set.
Parameter
Proportional
Setting
Band
Integral Time * Integral/
Derivative
Time *
*
Related Parameters
See
See
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
6 - 36
Proportional Band
Integral Time
Derivative Time
Refers to control in which the MV is proportional to the deviation (control error).
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.
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.
Temperature input
Analog input
Standard, heating/cooling, or
Derivative close position-proportional
Time Unit of control
1 s
Floating position-proportional
control
Integral/ Standard, heating/cooling, or
Derivative close position-proportional
Time Unit of control
0.1 s
Floating position-proportional
control
Integral/Derivative Time Unit of 1 s
Integral/Derivative Time Unit of 0.1 s
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.
The control must be set to 2-PID control.
Setting range
0.1 to 999.9
0 to 9999
1 to 9999
0.0 to 999.9
0.1 to 999.9
0 to 9999
0.0 to 999.9
E5@C-T Digital Temperature Controllers User's Manual (H185)
Unit Default
°C or °F
8.0
%FS 10.0
Seconds 233
Seconds 233.0
Seconds 40
Seconds 40.0