Rockwell Automation 1794-IRT8XT FLEX I/O Thermocouple/RTD /Millivolt Input Module User Manual - Manual (Page 48)

Publication 1794-6.5.12 - September 2011
36 Read and Write Configuration Maps for the FLEX I/O Module
Write Word 1
(continued)
0 0 External compensation – uses cold junction sensors. Both CJC sensors must be
used when external compensation is selected.
0 1
Internal compensation
– uses the user selected Reference Junction Selection.
1 0 No compensation. Data is referenced to 0 °C (32 °F).
1 1 Differential measurement between 2 channels (0…1, 2…3, 4…5, 6…7)
RTD
0 0 2-wire RTD no compensation
0 1 2-wire RTD with user selected RTD offset
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 Not used
Bits 08…11
(10…13)
Sensor Type (Thermocouple or RTD)
RTD Type
Bit
11 10 09 08 Sensor type for channels 4…7
0 0 0 0 Resistance (default)
0 0 0 1 100 Ω Pt α = 0.00385 Euro -200…+870 °C (-328…1598 °F)
0 0 1 0 200 Ω Pt α = 0.00385 Euro -200…+400 °C (-328…752 °F)
0 0 1 1 100 Ω Pt α = 0.003916 U.S. -200…+630 °C (-328…1166 °F)
0 1 0 0 200 Ω Pt α = 0.003916 U.S. -200…+400 °C (-328…752 °F)
0 1 0 1 100 Ω Nickel -60…+250 °C (-76…482 °F)
0 1 1 0 200 Ω Nickel -60…+200 °C (-76…362 °F)
0 1 1 1 120 Ω Nickel -80…+320 °C (-112…608 °F)
1 0 0 0 10 Ω Copper -200…+260 °C (-328…470 °F)
1001…1111 not used
Bits 08…11
(10…13)
Thermocouple Type
Bit
11 10 09 08 Sensor type for channels 4…7
0 0 0 0 mV (default)
0 0 0 1 B 300…1800 °C (572…3272 °F)
0 0 1 0 E -270…1000 °C (-454…1832 °F)
0 0 1 1 J -210…1200 °C (-346…2192 °F)
0 1 0 0 K -270…1372 °C (-454…2502 °F)
0 1 0 1 TXK/XK(L) -200…800 °C (-328…1472 °F)
0 1 1 0 N -270…1300 °C (-450…2372 °F)
0 1 1 1 R -50…1768 °C (-58…3214 °F)
1 0 0 0 S -50…1768 °C (-58…3214 °F)
Bit/Word Descriptions for Block Transfer Write Words
Word Dec. Bits
(Octal Bits) Description