Allen-Bradley 1747-SN User Manual page 148

Bit Number
Rack 0 Group 0 Word 0
Rack 0 Group 1 Word 1
Rack 0 Group 2 Word 2
Rack 0 Group 3
Word 3
Rack 0
Rack 0 Group 4 Word 4
Rack 0 Group 5 Word 5
Word 6
Rack 0 Group 6
Word 7
Rack 0 Group 7
Rack 1 Group 0 Word 8
Rack 1 Group 1 Word 9
Rack 1 Group 2 Word 10
Rack 1 Group 3
Word 11
Rack 1
Rack 1 Group 4 Word 12
Rack 1 Group 5 Word 13
Rack 1 Group 6 Word 14
Rack 1 Group 7 Word 15
Rack 2 Group 0 Word 16
Rack 2 Group 1 Word 17
Rack 2 Group 2
Word 18
Rack 2
Rack 2 Group 3 Word 19
Rack 2 Group 4 Word 20
Word 21
Rack 2 Group 5
Word 22
Rack 2 Group 6
Rack 2 Group 7 Word 23
Rack 3 Group 0 Word 24
Rack 3 Group 1 Word 25
Rack 3 Group 2
Word 26
Rack 3 Group 3 Word 27
Rack 3
Rack 3 Group 4 Word 28
Rack 3 Group 5 Word 29
Rack 3 Group 6 Word 30
Rack 3 Group 7 Word 31
Bit Number (octal)
As shown in the G file below, the 1747-ASB consumes 1/4 logical
rack of the scanner's I/O image table beginning at logical rack 3,
starting at group 6.
G File
RIO Rack 3
Starting Group
6 4
É É
Device Address, Word 1
1 0
Device Size, Word 2 É É É É
1 1
The scanner input file is shown below.
15 14 13 12 11 10
17 16 15 14 13 12
8 8 8 8 8 8
Application Examples
RIO Rack 2
Starting Group
2 0 6 4 2 0
0 1 0 0 0 1
1 1 1 1 1 1
9 8 7 6 5 4
11 10 7 6 5 4
8 8 8 8 8 8
RIO Rack 1 RIO Rack 0
Starting Group Starting Group
6 4 2 0 6 4
1
0 0 0 0 0
1 1 1 1 1 1
3 2 1 0
Input File
I:1.0
I:1.1
I:1.2
I:1.3
I:1.4
I:1.5
I:1.6
I:1.7
I:1.8
I:1.9
I:1.10
I:1.11
I:1.12
I:1.13
I:1.14
I:1.15
I:1.16
I:1.17
I:1.18
I:1.19
I:1.20
I:1.21
I:1.22
I:1.23
I:1.24
I:1.25
I:1.26
I:1.27
I:1.28
I:1.29
I:1.30
I:1.31
3 2 1 0
8 8 8 8
= used by other devices
Publication 1747 6.6 - July 1996
7–15
2 0
0 1
1 1
IV16 - OV16
uses O:1.30
1746 NIO4I
also uses
O:1.31