Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD/mV Input Module User Manual - Manual (Page 50)

Publication 1797-6.5.2 - February 2001
4-12 Input, Status, Output and Configuration Files for the Thermocouple/RTD/mV Module on the ControlNet Network
Configuration
word 1 cont.
Bits 04-05 Sensor Mode Select bits
Bit 05 04 Sensor mode select for channels 0-3
Thermocouple
0 0 CJC compensation – uses cold junction sensor
0 1 Fixed Temperature compensation – uses the value selected for reference junction
1 0 No compensation (Data is referenced to 0°C.)
1 1 Differential measurement between 2 channels
RTD
0 0 2-wire RTD no compensation
0 1 2-wire RTD with loop resistance compensation
1 0 3-wire RTD
1 1 4-wire RTD
Bits 06-07 Input Type Select
Bit 07 06 Input type selection for channels 0-3
0 0 Thermocouple
0 1 RTD
1 0
Not used
1 1
Configuration
Word
Dec. Bits
(Octal Bits)
Description