NAiS FP0 Series, Hardware Manual

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Analog I/O Unit FP0
4 - 16 Matsushita Automation Controls
4.6 Boosting the Precision of the Thermocouple Range
4.6 Boosting the Precision of the Thermocouple Range
When a high degree of precision is required, we recommend correcting the offset using
the program (we recommend initiating correction using the offset value taken
approximately 5 minutes after power is turned ON in order to take has been supplied,
taking into consideration the heat generated by the unit itself).
Te
mperature
(
q
C)
200
100
K100 K107 K200 K207
Digital value (WX2)
Measured value
Logical
Value
Offset error
Temperature
of terminal
Example
R9010
F27 (-), WX2, K7, DT100
Program example
In the above case, seven should be subtracted from the value of WX2.
The value with the offset value of “7” subtracted is stored at DT100.