Rockwell Automation Allen-Bradley 1769-OB16 - Rockwell Automation Publication 1769-IN088 A-EN-P - February

82 Rockwell Automation Publication 1769-IN088A-EN-P - February 2011
Chapter 3 I/O Memory Mapping
Some systems, like the 1769-ADN DeviceNet adapter system, also allow the bits
to be altered as part of the control program using communication rungs. In that
case, it is necessary to understand the bit arrangement.
Word
Bit Position
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
0 0 Real Time Sample Value
1 ETS Reserved
2EC Reserved EAALEI
(1)
Reserved Input Filter Sel Ch0
3 Reserved Input Data
Format Ch0
Reserved Input Type/Range
Select Ch0
4 SGN Process Alarm High Data Value Channel 0
5 SGN Process Alarm Low Data Value Channel 0
6 SGN Alarm Dead Band Value Channel 0
7 Reserved
8EC Reserved EAALEI
(1)
Reserved Input Filter Sel Ch1
9 Reserved Input Data
Format Ch1
Reserved Input Type/Range
Select Ch1
10 SGN Process Alarm High Data Value Channel 1
11 SGN Process Alarm Low Data Value Channel 1
12 SGN Alarm Dead Band Value Channel 1
13 Reserved
14 EC Reserved EA AL EI
(1)
Reserved Input Filter Sel Ch2
15 Reserved Input Data
Format Ch2
Reserved Input Type/Range
Select Ch2
16 SGN Process Alarm High Data Value Channel 2
17 SGN Process Alarm Low Data Value Channel 2
18 SGN Alarm Dead Band Value Channel 2
19 Reserved
20 EC Reserved EA AL EI
(1)
Reserved Input Filter Sel Ch3
21 Reserved Input Data
Format Ch3
Reserved Input Type/Range
Select Ch3
22 SGN Process Alarm High Data Value Channel 3
23 SGN Process Alarm Low Data Value Channel 3
24 SGN Alarm Dead Band Value Channel 3
25 Reserved
26 EC Reserved EA AL EI
(1)
Reserved Input Filter Sel Ch4
27 Reserved Input Data
Format Ch4
Reserved Input Type/Range
Select Ch4
28 SGN Process Alarm High Data Value Channel 4
29 SGN Process Alarm Low Data Value Channel 4
30 SGN Alarm Dead Band Value Channel 4
31 Reserved