Omron E5AR-T User Manual page 277

Section 8 Parameters
CH
Display PID Selection
Function
Setting
Reference
Reference
CH
PID Proportional Band
PID Integral Time
PID Derivative Time
( : 1 to 8)
Function
Setting
Reference
Reference
8-40
d.pid
Use this parameter to select the PID set that you wish to display.
• Set the number of the PID set that you wish to display.
• Up to 8 PID sets (PID Sets 1 to 8) can be used. PID constants, MV
upper and lower limits, and automatic selection range upper limits
are stored in each PID set.
Parameter
Display PID Selection 1 to 8
* Selected PID set.
● Related Parameters
PID Set Number (Program Setting Level) (P. 8-19)
.p
.i
.d
These parameters are used to store PID constants in each PID set. If
AT is executed, the values are set automatically.
P action: Control action using an MV proportional to the deviation.
I action: Control action using an output that is proportional to the time
integral of the deviation. The P action causes an offset, and
thus it is used in combination with the I action. As time
elapses, the offset disappears and the controlled temper-
ature and SP equalize.
D action: Control action using an output that is proportional to the time
derivative of the input. The P action and I action serve to
correct the control result and thus respond slowly to sudden
temperature changes. The D action corrects control by
adding an MV that is proportional to the slope of the temper-
ature change.
Parameter
Proportional Band (P) 0.00 to 999.99
Integral Time (I) 0.0 to 3999.9
Derivative Time (D) 0.0 to 3999.9
• For ON/OFF control, set the proportional band to 0.0. The propor-
tional band cannot be set to 0.0 on a Position-proportional Control
Model.
• For P control or PD control, set the integral time to 0.0. The integral
time cannot be set to 0.0 on a Position-proportional Control Model
when performing floating control or when the Operation at Potenti-
ometer Input Error parameter is set to "Continue."
● Related Parameters
AT Execute/Cancel (Adjustment Level) (P. 8-23)
Setting range Unit
Setting range Unit
%FS
s
s
l.pid
Default value
*
l.pid
2-PID control
Default value
10.00
233.0
40.0