Omron E5GN User Manual page 53

CHAPTER 4 APPLIED OPERATION
J1-point shift
method
Adjustment level
Upper-limit
temperature
input shift value
Lower-limit
temperature
input shift value
J2-point shift
method
Temperature readout
after input shift X2 (e.g. 110_C)
Temperature readout
before input shift Y2 (e.g. 105_C)
Temperature readout
before input shift Y1 (e.g. 40_C)
Temperature readout
after input shift X1 (e.g. 25_C)
Lower-limit temperature
input shift value
4–4
(1) In the configuration shown in Figure 1, bring the set point to near the
value at which the temperature of the control target is to be con
trolled. Let's assume that the control target temperature (C) and the
control target temperature (B) are matching.
(2) Check the control target temperature (B) and the controller readout
(A). Take the following value as the input shift value, and set the same
numerical values to 
control target temperature (B) controller readout (A)
Figure 2 shows the effect of 1 point temperature input shift.
(3) After you have set the input shift values, check controller readout (A)
and control target temperature (B). If they are almost the same, this
completes temperature input shift.
Controller readout (A)
Temperature readout
after shift (e.g. 120_C)
Temperature readout
before shift (e.g. 110_C)
0
Figure2 1-point Temperature Input Shift
Use 2 point input shift if you want to increase the accuracy of the readout
values across the range of the sensor.
(1) Shift the controller readout by two points, near room temperature
and near the value at which the temperature of the control target is
to be controlled. For this reason, bring the control target temperature
to near room temperature and to near the set point, and check control
target temperature (B) and controller readout (A).
(2) Using equations (1) and (2) calculate the upper and lower limit tem
perature input shift values from the readout and temperature to be
shifted that you obtained in step 1.
Figure 3 shows the effect of shift by 2 point temperature input shift.
Controller readout (A)
Set temperature
upper limit YH
(e.g. 260_C)
0 X1 room temperature
(e.g. 25_C)
Set temperature
lower limit YL (e.g. 0_C)
Figure3 2-point Temperature Input Shift
" and  ".
After shift
Input shift value (e.g. 10_C)
Before shift
Temperature readout of
control target (B)
Near set point
(e.g. 120_C)
After shift
Upper-limit temperature
input shift value
Before shift
Temperature readout of
control target (B)
Near X2 set point (e.g. 110_C)