Allen-Bradley 1747-SN - Page 148

7–15Application Examples
Publication 17476.6 - July 1996
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.
0 100
1
0001000100
ÉÉ
ÉÉ
1
111111111111111
ÉÉ
1
RIO Rack 0
Starting Group
0246
RIO Rack 1
Starting Group
0246
RIO Rack 2
Starting Group
0246
RIO Rack 3
Starting Group
0246
Device Address, Word 1
Device Size, Word 2
G File
The scanner input file is shown below.
Rack 3 Group 6
Rack 3 Group 7
Rack 1 Group 2
Rack 1 Group 3
Rack 1 Group 0
Rack 1 Group 1
Rack 1 Group 6
Rack 1 Group 4
Rack 1 Group 5
Rack 0 Group 6
Rack 0 Group 7
Rack 0 Group 4
Rack 0 Group 5
Rack 0 Group 2
Rack 0 Group 3
0123456789101112131415
Bit Number
Word 0
Word 1
Word 2
Word 3
Word 4
Word 7
Word 8
Word 9
Word 10
Word 11
Word 12
Word 13
Word 14
Word 5
Word 6
Word 30
Word 31
Rack 0 Group 0
Rack 0 Group 1
Rack 3 Group 1
Rack 3 Group 2
Rack 2 Group 7
Rack 3 Group 0
Rack 3 Group 5
Rack 3 Group 3
Rack 3 Group 4
Rack 2 Group 5
Rack 2 Group 6
Rack 2 Group 3
Rack 2 Group 4
Rack 2 Group 1
Rack 2 Group 2
Word 15
Word 16
Word 17
Word 18
Word 19
Word 22
Word 23
Word 24
Word 25
Word 26
Word 27
Word 28
Word 29
Word 20
Word 21
Rack 1 Group 7
Rack 2 Group 0
Rack 0
Rack 1
Rack 2
Rack 3
1746NIO4I
also
uses
O:1.31
0
8
1
8
2
8
3
8
4
8
5
8
6
8
7
8
10
8
11
8
12
8
13
8
14
8
15
8
16
8
17
8
Bit Number (octal)
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:1.30
I:1.31
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
= used by other devices
IV16 - OV16
uses O:1.30