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
Decimal15141312111009080706050403020100
Octal 17161514131211100706050403020100
Word⇓ Read
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.
