Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 142)

Publication 900-UM007D-EN-E - January 2011
4-6 Parameter Adjustments & Application Considerations
Figure 4.13 — Two-Point Temperature Input Shift
3. After you have configured the calculated values for cnsl for and
cnsh, check/compare controller readout (A) with the control target
temperature (B).
Figure 4.14 — Temperature Input Shift Value
4. Although the input shift was carried out at two points, close to room
temperature (ambient temperature) and near to the set point, you may
want to consider selecting points close to each end of the sensor range
to improve accuracy across the full range of the sensor measurement
range.
Note: Before selecting these values, check that they will not damage the
control application, if applied.
Controller readout (A)
Set temperature
upper limit YH
(e.g. 260
° C)
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
X1 room temperature
(e.g. 25
° C)
Set temperature
lower limit YL (e.g. 0
° C)
Near X2 set point (e.g. 110 ° C)
Temperature readout of
control target (B)
Before shift
Upper-limit temperature
input shift value
After shift
0
C insh
10.0
C
insl
10.0
Upper-limit
temperature
input shift
value
Lower-limit
temperature
input shift
value