Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 316)

Addressing
Appendix A
AĆ9
Figure A.6
Illustration of 1Ćslot Addressing with 16Ćpoint I/O Modules
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Input
Terminals Output
Terminals
17 16 15 14 04 03 02 01 00
Output image table word
corresponding to the I/O group.
1Ćslot
I/O Group
17 16 15 14 04 03 02 01 00
Output image table word
corresponding to the I/O group.
17 16 15 14 04 03 02 01 00
Input image table word
corresponding to the I/O group.
17 16 15 14 04 03 02 01 00
Input image table word
corresponding to the I/O group.
1Ćslot
I/O Group
OR
The corresponding opposite image table word is not used
when 16-point modules are used.
Assigning I/O Rack Numbers
When you select 1-slot addressing, each slot is an I/O group. You still
assign one I/O rack number to eight I/O groups; therefore, in a 16-slot I/O
chassis you now have two I/O racks (Figure A.7).