Rockwell Automation 1746-NT8 SLC 500 Thermocouple/mV Analog Input Module User Manual User Manual
Page 44
Publication 1746-UM022B-EN-P - January 2005
4-4 Channel Configuration, Data, and Status
A detailed explanation appears in the following table:
Channel Configuration Word (0:e.0 through 0:e.7) - Bit Definitions
To Select
Make these bit settings
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Channel
Enable
Channel Disable
0
Channel Enable
1
Input
Type
Thermocouple J
0
0
0
0
Thermocouple K
0
0
0
1
Thermocouple T
0
0
1
0
Thermocouple E
0
0
1
1
Thermocouple R
0
1
0
0
Thermocouple S
0
1
0
1
Thermocouple B
0
1
1
0
Thermocouple N
0
1
1
1
-50 to +50 mV
1
0
0
0
-100 to +100 mV
1
0
0
1
Invalid
1
0
1
0
Invalid
1
0
1
1
Invalid
1
1
0
0
Invalid
1
1
0
1
Invalid
1
1
1
0
CJC temperature
1
1
1
1
Data
Format
Engineering Units x 1
(1)
0
0
Engineering Units x 10
0
1
Scaled-for-PID
1
0
Proportional counts
1
1
Open Circuit
Zero on open circuit
0
0
Max. on open circuit
0
1
Min. on open circuit
1
0
Disabled
1
1
Temperature
units
°C
(2)
0
1
Channel
filter
frequency
10 Hz input filter
0
0
50 Hz input filter
0
1
60 HZ input filter
1
0
250 Hz input filter
1
1
Unused
Unused
(3)
0
0
0
Invalid
1
1
1
Input Image
Type
Status Word
0
Data Word
1
(1) For engineering units x 1, values are expressed in 0.1 degrees or 0.01 mV. For engineering units x 10, values are expressed in 1.0 degrees or 0.1 mV.
(2) When millivolt input type is selected, the bit setting for temperature units is ignored.
(3) Ensure unused bits 12 through 14 are always set to zero.