10
MicroLogix™ 1762-IQ8 DC Input Module
1762-IN004A-US-P
I/O Memory Mapping
Input Data File
For each input module, the input data file contains the current state of the field
input points. Bit positions 0 through 7 correspond to input terminals 0 through 7.
r = read only, 0 = always at a 0 or OFF state
Addressing
The addressing scheme for 1762 Expansion I/O is shown below.
(1) I/O located on the controller (embedded I/O) is slot 0. I/O added to the controller (expansion I/O) begins
with slot 1.
Wo
rd
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
r
r
r
r
r
r
r
r
I1:x.0/0
Input
Data File
Slot Number
(1)
Word (always zero for this module)
Bit (0 - 7)
Bit Delimiter
Word Delimiter
Slot Delimiter