Omron CJ2 CPU UNIT SOFTWARE User Manual page 281

Basic I/O Units in Expansion Racks
I/O allocation to Basic I/O Units continues from the CPU Rack to the Expansion Rack connected
directly to the CPU Rack. Words are allocated from left to right and each Unit is allocated as
many words as it requires, just like Units in the CPU Rack.
Example
From the left
From the left
From the left
I/O Allocation to Special I/O Units
Each CJ-series Special I/O Unit is allocated ten words in the Special I/O Unit Area (CIO 2000 to
CIO 2959) according the unit number set on the Unit. Special I/O Units can be mounted to the CPU
Rack or Expansion Racks. The following table shows which words in the Special I/O Unit Area are
allocated to each Unit.
Unit number
0
1
2
:
15
:
:
95
Special I/O Units are ignored during I/O allocation to Basic I/O Units. Positions containing Special
I/O Units are not allocated any words in the I/O Area.
CJ2 CPU Unit Software User's Manual
→
1 2 3 4 5
IN IN IN OUT OUT
16 pt 32 pt 64 pt 16 pt 32 pt
0000 0001 0003 0007 0008
0002 to 0009
0006
→
1 2 3
Expansion Rack
IN IN OUT
16 pt 32 pt 8 pt
0010 0011 0013
0012
→
1 2 3
Expansion Rack
IN IN OUT
16 pt 32 pt 16 pt
0014 0015 0017
0016
Number of words
10
10
10
:
10
:
:
10
8 I/O Allocations and Unit Settings
CPU Rack
Words allocated
CIO 2000 to CIO 2009
CIO 2010 to CIO 2019
CIO 2020 to CIO 2029
:
CIO 2150 to CIO 2159
:
:
CIO 2950 to CIO 2959
8
8-7