Omron E5AR - MANUAL 2 User Manual page 234

CH
PID Proportional band
PID Integral time
PID Derivative time
( : 1 to 8)
These settings are used to store PID values in each PID set. If AT is run, the values are set automatically.
Function
Setting
Reference
Reference
CH
PID MV upper limit
PID MV lower limit
( : 1 to 8)
Function
.p
.i
.d
P action: Control action using an MV proportional to the deviation.
I action: Control action using output that is proportional to the time
integral of the deviation. P action causes an offset, and thus
it is used in combination with I action. As time elapses the
offset disappears and the controlled temperature and SP
equalize.
D action: Control action using output that is proportional to the time
derivative of the input. P action and I action serve to correct
the control result and thus respond slowly to sudden temper-
ature changes. D action corrects control by adding an MV
that is proportional to the slope of the temperature change.
Setting data
Proportional band (P)
Integral time (I)
Derivative time (D)
• For ON/OFF control, set the proportional band to "0.0". "0.0" cannot
be selected on a position proportional type.
• For P control or PD control, set the integral time to "0.0". "0.0"
cannot be selected on a position proportional type when performing
floating control or when "Operation at potentiometer error" is set to
"Continue".
● Related setting data
"AT Execute/Cancel" (Adjustment level) (P.8-13)
.ol-h
.ol-l
• Use "MV upper limit" and "MV lower limit" to set upper- and lower-
limits for the MV. When the unit calculates an MV that is outside of
the upper and lower limits, the upper or lower-limit is output.
• MV upper limit
The setting range differs for standard control and heating/cooling
control.
The cooling MV of heating/cooling control is expressed as a
negative value.
8.7 PID setting level (l.pid)
Advanced PID control
Setting range Units
0.00 to 999.99 %FS
0.0 to 3999.9 Sec
0.0 to 3999.9 Sec
Advanced PID control
l.pid
Default value
10.00
233.0
40.0
l.pid
8-31