132
8.1.5
Sensor correction function
When a difference occurs between the temperature process value (PV) and the actual temperature due to reasons
such as a measuring condition, the difference can be corrected using this function. The following two types are
available.
• Normal sensor correction (one-point correction) function (
• Sensor two-point correction function (
(1) Normal sensor correction (one-point correction) function
The percentage of the full scale of the set input range can be corrected as an error corrected value.
Set a correction value to CH
Sensor correction value setting (address: 280H to 283H).
Ex.
When the temperature measurement range of input range is set to -200.0
to 200.0
with the actual
temperature being 60
and the temperature process value (PV) being 58
Based on the above formula, set 50 (0.50%) to CH
Sensor correction value setting (address: 280H to 283H).
(a) How to execute normal sensor correction (one-point correction)
1.
Set "Method selection" to "Param write" of the control mode to be used.
"CC IE Field Configuration" window
Select the temperature control module from "List of
stations"
[CC IE Field Configuration]
[Online]
[Parameter Processing of Slave Station]
2.
Set "0: Normal sensor correction (One-point correction)" to "CH
Sensor correction function
selection".
3.
Set "CH
Sensor correction value setting"
Common
(Actual temperature - Temperature process value (PV))
Sensor correction value setting =
Full scale
=
400
2
100 ×
100 ×
= 0.5 (%)
After correction
Before correction
Input temperature
Temperature process value (PV)
2
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