Omron CJ2 CPU UNIT SOFTWARE User Manual

8 I/O Allocations and Unit Settings
8-2
CJ2 CPU Unit Software User’s Manual
8-1 I/O Allocations
Allocating words in I/O memory in the CPU Unit for exchanging data between the CPU Unit and other
Units is called I/O allocation. Memory is allocated differently to Basic I/O Units, Special I/O Units, and
CPU Bus Units.
8-1-1 I/O Allocations
Special I/O Unit Area
The words that are allocated
are determined by the unit number.
25 words allocated per Unit
CPU Bus Unit Area
10 words allocated per Unit
Special I/O Units
2
ON
4
TERM
RD2
SD2
RDY
NO.
UNIT
ERH
OFF
WIRE
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
ERC
RUN
SCU41
RD1
TER1
SD1
PORT1
(RS422
/485)
PORT2
CIO 0000
CIO 1000
CIO 0159
CIO 1500
CIO 1899
CIO 2000
CIO 2959
Memory is allocated in units of 16 bits
OD211
0123
4567
89 1
0 11 12 1
3 14
15
*1
Basic I/O Units
*1 The first word on each Rack can be set from the CX-Programmer to an address
between CIO 0000 and CIO 0999 (default setting: consecutive allocation from
CIO 0000).
Allocations
The words that are allocated
are determined by the position
of the Unit.
CPU Bus Units
I/O Memory Areas in CPU Unit
I/O Area
The words that are allocated
are determined by the unit number.
Special
Units

Omron CJ2 CPU UNIT SOFTWARE Specifications

General

Brand	Omron
Model	CJ2 CPU UNIT SOFTWARE
Category	Software
Language	English