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Assigning i/o rack numbers – Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual User Manual

Page 316

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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).