212
16.3.6 Note on Allen Bradley Input/Output address mapping
Input I1 dddbb: Where ddd designates the element no. and bb designates the bit number
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
I :0
I :1
I :2
I: 3
Output O0 dddbb: Where ddd designates the element no. and bb designates the bit number
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
O :0
O :1
O :2
O: 3
For example, the address “O 102” designates output memory word 1, bit 2.
Allen Bradley IO address format
O: eee.sss/bb and I: eee.sss/bb
Where eee = slot number, sss = word number and bb = bit number
Example: A controller is configured with 8 point
output
modules in slots 1 and 2, a 16 point
input
module in slot 3, and a 16
point
output
module in slot 4. The mapping for Allen Bradley IO addresses to internal memory address is as follows:
Slot – Type
AB Program Addressing
AB Internal Addressing to be used in MMI
1 - 8 point output
O: 1.0/0 ~ 1.0/7
O: 00 ~ 07
2 - 8 point output
O: 2.0/0 ~ 2.0/7
O: 100 ~ 107
3 - 16 point input
I: 3.0/0 ~ 3.0/15
I: 00 ~ 15
4 - 16 point output
O: 4.0/0 ~ 4.0/15
O: 200 ~ 215
Summary of Contents for MMI-1500
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