Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD/mV Input Module User Manual User Manual
Page 51
Publication 1797-6.5.2 - February 2001
Input, Status, Output and Configuration Files for the Thermocouple/RTD/mV Module on the ControlNet Network 4-13
Configuration
Word 1 cont.
Bits 08-11
(10-13)
Sensor Type (Thermocouple or RTD)
RTD Type
Bit
11
10
09
08
Sensor type for channels 4 through 7
0
0
0
0
Resistance (default)
0
0
0
1
100 ohm Pt
α
= 0.00385 Euro (–200 to +870°C)
0
0
1
0
200 ohm Pt
α
= 0.00385 Euro (–200 to +400°C)
0
0
1
1
100 ohm Pt
α
= 0.003916 U.S. (–200 to +630°C)
0
1
0
0
200 ohm Pt
α
= 0.003916 U.S. (–200 to +400°C)
0
1
0
1
100 ohm Nickel (–60 to +250°C)
0
1
1
0
200 ohm Nickel (–60 to +200°C)
0
1
1
1
120 ohm Nickel (–80 to +320°C)
1
0
0
0
10 ohm Copper (–200 to +260°C)
1001 through 1111 not used
Thermocouple Type
Bit
11
10
09
08
Sensor type for channels 4 through 7
0
0
0
0
mV (default)
0
0
0
1
B
300 to 1800°C
(572 to 3272°F)
0
0
1
0
E
–250 to 1000°C
(–418 to 1832°F)
0
0
1
1
J
–210 to 1200°C
(–346 to 2192°F)
0
1
0
0
K
–250 to 1372°C
(–418 to 2502°F)
0
1
0
1
L
–200 to 800°C
(–328 to 1472°F)
0
1
1
0
N
–250 to 1300°C
(–418 to 2372°F)
0
1
1
1
R
0 to 1768°C
(32 to 3214°F)
1
0
0
0
S
0 to 1768°C
(32 to 3214°F)
1
0
0
1
T
–250 to 400°C
(–418 to 752°F)
1010 through 1111 not used
Bits 12-13
(14-16)
Sensor Mode Select bits
Bit
13
12
Sensor mode select for channels 4-7
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
Configuration
Word
Dec. Bits
(Octal Bits)
Description