347
I/O Allocations Section 8-1
Example
The following example shows the I/O word allocation to Basic I/O Units and
Special I/O Units in the CPU Rack.
I/O Allocation to CPU Bus
Units
Each CJ-series CPU Bus Unit is allocated 25 words in the CPU Bus Unit Area
(CIO 1500 to CIO 1899) according the unit number set on the Unit. CJ-series
CPU Bus Units can be mounted to the CJ-series CPU Rack or CJ-series
Expansion Racks.
■ Word Allocation
The following table shows which words in the CJ-series CPU Bus Unit Area
are allocated to each Unit.
CPU Bus Units are ignored during I/O allocation to Basic I/O Units. Positions
containing CJ-series CPU Bus Units aren’t allocated any words in the I/O
Area.
Power Supply Unit
CPU Unit
IN
16 pt
CIO
0000
Special
I/O
Unit
CIO
2000
to
2009
OUT
16 pt
CIO
0001
Special
I/O
Unit
CIO
2010
to
2019
OUT
32 pt
CIO
0002
CIO
0003
10234
Slot Unit Words
required
Words allocated Unit
number
Group
0 CJ1W-ID211 16-point DC Input Unit 1 CIO 0000 --- Basic I/O Unit
1 CJ1W-AD081 Analog Input Unit 10 CIO 2000 to CIO 2009 0 Special I/O Unit
2 CJ1W-OD211 16-point Transistor Output Unit 1 CIO 0001 --- Basic I/O Unit
3 CJ1W-TC001 Temperature Control Unit 20 CIO 2010 to CIO 2029 1 Special I/O Unit
4 CJ1W-OD231 32-point Transistor Output Unit 2 CIO 0002 and CIO 0003 --- Basic I/O Unit
Unit number Words allocated
0 CIO 1500 to CIO 1524
1 CIO 1525 to CIO 1549
2 CIO 1550 to CIO 1574
::
15 CIO 1875 to CIO 1899
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