Slot addressing examples -9, Slot addressing examples, Modules requiring one word – Rockwell Automation 1747-ASB Remote I/O Adapter User Manual
Page 45: Modules requiring more than one word
Publication 1747-UM006B-EN-P - June 2003
Addressing 3-9
1-Slot Addressing Examples
The following example illustrates how to map modules requiring:
•
one word of input or output image
•
more than one word of input or output image
If images overlap, a 1747-ASB module error occurs. For example, if
32-point input modules are installed in slots 1 and 2, their input
images overlap and a 1747-ASB module error occurs.
I
I
I
I
I
O
O
O
O
0
1
2
3
4
5
6
7
8
9
10
11 12
13
14
15 16
17 18
1746 Slot Numbering
Slot Pair
1
2
3
4
5
6
7
8
9
O
I
I
I
I
O
O
O
O
O
I = Input Module
= Output Module
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Slot Pair
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
1
2
3
4
5
6
7
8
9
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 18
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 18
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 18
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 18
1
2
3
4
5
6
7
8
9
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 18
Slot 18
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
Slot 1
Slot 3
Slot 5
Slot 7
Slot 9
Slot 11
Slot 13
Slot 15
Slot 17
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 18
Slot 2
Slot 4
Slot 6
Slot 8
Slot 10
Slot 12
Slot 14
Slot 16
Slot 18
= unused
1747-ASB Input Image
1747-ASB Output Image
0
7
8
15
0
7
8
15
1747-ASB Input Image
1747-ASB Output Image
0
7
8
15
0
7
8
15
7
0
10
17
Decimal
Octal
7
0
10
17
Decimal
Octal
7
0
10
17
Decimal
Octal
7
0
10
17
Decimal
Octal
Slot Pair
Slot Pair
Slot Pair
Modules Requiring One Word
In the example below, the modules require one word of input or output image.
Input modules do not have to be paired with output modules, because in this
example, only one word of input and output image is required.
To reduce unused image space, slot pairing can be used with 32-point I/O
modules or the system can be configured for complementary I/O. For more
information, refer to the complementary I/O description found on page 4-5.
Modules Requiring More Than One Word
In the example below, the modules require more than one word of
input or output image.
Input modules must be paired with output modules so their input and
output images do not overlap.