Rockwell Automation 1746-NR4 SLC RTD/Resistance Input Module User Manual User Manual
Page 66
Publication 1746-UM008B-EN-P - December 2006
66 Channel Configuration, Data, and Status
Channel Configuration Word (O:e.0 through O:e.3) - Bit Definitions
Bit(s)
Define
To select
Make these bit settings in the Channel Configuration Word
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0…3
Input type selection
100
Ω Pt RTD (385)
0
0
0
0
200
Ω Pt RTD (385)
0
0
0
1
500
Ω Pt RTD (385)
0
0
1
0
1000
Ω Pt RTD (385)
0
0
1
1
100
Ω Pt RTD (3916)
0
1
0
0
200
Ω Pt RTD (3916)
0
1
0
1
500
Ω Pt RTD (3916)
0
1
1
0
1000
Ω Pt RTD (3916)
0
1
1
1
10
Ω Cu RTD (426)
(1)
1
0
0
0
120
Ω Ni RTD (618)
(2)
1
0
0
1
120
Ω Ni RTD (672)
1
0
1
0
604
Ω NiFe RTD (518)
1
0
1
1
150
Ω Resistance Input
1
1
0
0
500
Ω Resistance Input
1
1
0
1
1000
Ω Resistance Input
1
1
1
0
3000
Ω Resistance Input
1
1
1
1
4…5
Data format selection
Engineering units X 1
(3)
0
0
Engineering units X 10
(4)
0
1
Scaled-for-PID
1
0
proportional counts
1
1
6…7
Broken input selection
Set to Zero
0
0
Set to Upscale
0
1
Set to Downscale
1
0
Invalid
1
1
8
Temperature units selection
Degrees C
(5)
0
Degrees F
(5)
1
9…10
Filter frequency selection
10 Hz
0
0
50 Hz
0
1
60 Hz
1
0
250 Hz
1
1
11
Channel enable
Channel Disabled
0
Channel Enabled
1
13…14
Scaling selection
Default Scaling
0
0
User-set Scaling (Range 0)
(6)
0
1
User-set Scaling (Range 1)
(6)
1
0
Invalid
1
1
15
Unused
Unused
(7)
0
(1)
Actual value at 0 °C (32 °F) is 9.072
Ω per SAMA standard RC21-4-1966.
(2)
Actual value at 0 °C (32 °F) is 100
Ω per DIN standard.
(3)
Values are in 0.1 degree/step or 0.1
Ω/ step for all resistance types, except 150 Ω. For the 150 Ω resistance input type, the values are in 0.01 Ω/step.
(4)
Values are in 1 degree/step or 1
Ω/step for all resistance input types, except 150 Ω. For the 150 Ω resistance input type, the values are in 0.01 Ω/step.
(5)
This bit is ignored when a resistance device is selected.
(6)
Applies to proportional counts data format selected using bits 4 and 5.
(7)
Ensure unused bit 15 is always set to zero.
No
t u
se
d
No
t
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ed
No
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