Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD Module - Manual (Page 16)

16 FLEX Ex Thermocouple/RTD Input Module
Publication 1797-5.4 - June 2010
Sensor Mode Select - Write Word 1
RTD Offset Select - Write Word 2
Bit 05 04 Sensor mode for channels 0…3
13 12 Sensor mode for channels 4…7
Thermocouple Mode
0 0
External compensation - uses cold junction sensor
0 1 Internal 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 Mode
0 0 2-wire RTD - no compensation
0 1 2-wire RTD with user compensation
1 0 3-wire RTD
1 1 4-wire RTD
Bit 01 00 RTD Offset Select Bits - Channel 0
03 02 RTD Offset Select Bits - Channel 1
05 04 RTD Offset Select Bits - Channel 2
07 06 RTD Offset Select Bits - Channel 3
09 08 RTD Offset Select Bits - Channel 4
11 10 RTD Offset Select Bits - Channel 5
13 12 RTD Offset Select Bits - Channel 6
15 14 RTD Offset Select Bits - Channel 7
0 0 Use channel loop compensation value stored during
calibration procedure for 2-wire RTD (default = 0

0 1 5 
1 0 10

1 1 15

Note: This parameter not applicable for Cu 10 , which defaults to 0 .