346
I/O Allocations Section 8-1
Example
The following example shows the I/O allocation to Basic I/O Units in the CPU
Rack and two CJ-series Expansion Racks.
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. Spe-
cial I/O Units can be mounted to the CJ-series CPU Rack or CJ-series Expan-
sion Racks.
Refer to
2-4 I/O Units for more details on the available Special I/O Units.
■ Word Allocations
The following table shows which words in the Special I/O Unit Area are allo-
cated to each Unit.
Special I/O Units are ignored during I/O allocation to Basic I/O Units. Positions
containing Special I/O Units aren’t allocated any words in the I/O Area.
IN
16 pt
0010
IN
16 pt
0000
OUT
16 pt
0007
IN
32 pt
0011
0012
IN
32 pt
0001
0002
IN
64 pt
0003
0006
OUT
32 pt
0008
0009
OUT
8 pt
0013
123
12345
IN
16 pt
0014
IN
32 pt
0015
0016
OUT
16 pt
0017
123
to
From the left→
From the left→
From the left→
CPU Rack
Expansion Rack
Expansion Rack
Power Supply Unit
Power Supply Unit
Power Supply Unit
CPU Unit
Unit number Words allocated
0 CIO 2000 to CIO 2009
1 CIO 2010 to CIO 2019
2 CIO 2020 to CIO 2029
::
15 CIO 2150 to CIO 2159
:
:
:
:
95 CIO 2950 to CIO 2959
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