Rockwell Automation 1794-IRT8XT FLEX I/O Thermocouple/RTD /Millivolt Input Module User Manual - Manual (Page 55)

Publication 1794-6.5.12 - September 2011
Calibrate Your Module 43
5 Channel 5 Input Data
6 Channel 6 Input Data
7 Channel 7 Input Data
8 Overrange Alarm Bits (channel 0 = bit 08, and so on.) Underrange Alarm Bits (channel 0 = bit 00, and so on.)
9 Ch7
Flt
Ch6
Flt
Ch5
Flt
Ch4
Flt
Ch3
Flt
Ch2
Flt
Ch1
Flt
Ch0
Flt
CJC 2
Flt
CJC 1
Flt
SAB Diagnostic Status
10 EDT command response EDT data response
Where: Flt = Fault
CJC = Cold Junction Compensation
SAB = Series of unit; 0 = Series A; 1 = Series B
Read Words for Calibration
Decimal 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Octal 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Word
⇓
Read
ATTENTION
The CJC Status bit, Read Word 9, Bit 3 is added with the Firmware C
release of the 1794-IRT8 Series B module.
The CJC Status bit is turned On when the temperature between the
CJCs is greater than 6 °C but less than 12 °C.
When this temperature difference is above 12 °C, then the CJC Alarm
bits are set.
Also, if a CJC temperrature is over-range or under-range, then the
associated CJC Alarm bit is set. In this condition, the CJC Status bit is
not set.
The CJC Status bit does not exist in Series A.