C3-11
IM 34M06H62-02E 2nd Edition : June 2008-00
Burnout detection is not performed when EXPV/PV is set to “1: external input”.
If the Burnout Selection (BSL) parameter is set to ‘Down-scale’ for a thermocouple range,
a burnout may not be detected in high temperature environments exceeding 40C.
In this situation, set the alarm type to ‘Lower Limit’, set an appropriate alarm preset value,
and use the alarm for burnout detection instead.
C3.6 Reference Junction Compensation
When Reference Junction Compensation (RJC) is set to ‘1: ON’, the temperature of the
terminal block of the module is automatically measured and used for reference junction
compensation in the thermocouple temperature measurement.
If an external reference point device is used to provide even better reference junction
compensation, set RJC to ‘0: Fixed Value’, and set EXRJC to the reference junction
temperature.
Table C3.10 Reference Junction Compensation Parameters
Data Position Number
Symbol Description Unit Data Range
Default
Value
Attribute
Stored
Loop 1 Loop 2 Loop 3 Loop 4
149 349 549 749 RJC
Reference junction
compensation
None
0: Fixed value
1: ON
1 RW
132 332 532 732 EXRJC
Reference junction
temperature
Industrial
unit
-100 to 700
(-10.0C to 70.0C)
0 RW —
CAUTION
CAUTION
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