E5CNH E5AN-H E5EN-H Digital Controllers User's Manual - OMRON

Shifting Input Values Section 4-1
Figure 1
(A) E5@N-H
Method for a 2-point
Shift
3. After setting the input shift values, check the Controller readout (A) and the
control target temperature (B). If they are approximately the same, this
completes setting the input shift.
(C) Control target
(B) Thermometer
Controller readout after
shifting (e.g., 120°C)
Controller readout before
shifting (e.g., 110°C)
Controller readout (A)
Use a 2-point input shift if you want to increase the accuracy of the readout
values across the range of the Sensor.
1,2,3... 1.
2.
Shift the Controller readout at two points, near room temperature and near
the value at which the temperature of the control target is to be controlled.
For this reason, check the thermometer temperature (B) and Controller
readout (A) with the thermometer temperature near room temperature and
near the set point.
Y1 is the Controller readout at room temperature before shifting and
X1 is the Controller readout at room temperature after shifting.
Y2 is the Controller readout at the set temperature before shifting and
X2 is the Controller readout at the set temperature after shifting.
Set the upper-limit temperature input shift and the lower-limit temperature
input shift using the following formulas based on the temperatures
before shifting (Y1 and Y2), the temperatures after shifting (X1
and X2), the set temperature upper limit (YH), and the set temperature
lower limit (YL). The shift is illustrated in Figure 3.
YH: Set temperature upper limit
(e.g., 260°C)
Controller readout (A)
Figure 3 Illustration of 2-Point Shift
0
After shifting
Near set point
(e.g., 120°C)
Input shift value (e.g., 10°C)
Before shifting
Control target temperature (B)
Figure 2 Illustration of 1-Point Shift
After shifting
Upper-limit temperature input
shift value (e.g., 52.7°C) insh
Before shifting
X2: Controller readout after shifting
(e.g., 110°C)
Y2: Controller readout before shifting
(e.g., 105°C)
Y1: Controller readout before shifting
(e.g., 40°C)
X1: Controller readout after shifting
(e.g., 25°C)
Lower-limit temperature input
shift value (e.g., −27.3°C) insl 0
X1: Room temperature
(e.g., 25°C)
Control target temperature (B)
260°C
X2: Near set point (e.g., 110°C)
YL: Set temperature lower limit
(e.g., 0°C)
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