Rockwell Automation 1771-ASB/E Remote I/O Adapter User Manual User Manual
Page 36
3–6
Addressing Modes for Your Remote I/O
Publication 1771-UM001A-US-P - February 2000
Figure 3.5
16Ćpoint Input and Output Modules Using Two Words of the
Image Table
17 16 15 14
12
10 07 06 05
03 02 01 00
04
11
13
O utput im age table word corresponding
to the I/O group.
17 16 15 14
12
10 07 06 05
03 02 01 00
04
11
13
Input im age table word corresponding
to the I/O group.
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
Input
Term inals
O utput
Term inals
15559
2Ćslot I/O Group
Because these modules use a full word in the image table, the only
type of module you can use in a 2-slot I/O group with a 16-point
module is one that performs the opposite (complementary) function;
an input module complements an output module and vice-versa.
You can use an 8-point module with a 16-point module in a 2-slot
group; it must perform the opposite function. However, eight bits in
the I/O image table are unused.