User Manual

3–4 Addressing Modes for Your I/O
Publication 1771-6.5.124 – August 1997
Using Standard-density I/O (8 point) Modules
Standard-density I/O modules provide eight input terminals or eight
output terminals. Figure 3.3 illustrates the 2-slot I/O group concept
with two 8-point input modules. Figure 3.4 shows an 8-point input
module and an 8-point output module in a 2-slot I/O group.
Figure 3.3
Two 8-point Input Modules Using One Word of the Input Image
Table
Input
Terminals
00
01
02
03
04
05
06
07
Input
Terminals
10
11
12
13
14
15
16
17
17 16 15 14 12
10
07
06
05 03
02 01
00
04
11
13
Output image table word corresponding
to the I/O group.
unused
17 16 15 14 12
10
07
06
05 03
02 01 00
04
11
13
Input image table word corresponding
to the I/O group.
11867
2-slot I/O Group