Omron CJ - 08-2008 - Overview of the Data Areas

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I/O Memory Areas Section 9-2
9-2-2 Overview of the Data Areas
The data areas in the I/O Memory Area are described in detail below.
CIO Area It is not necessary to input the “CIO” acronym when specifying an address in
the CIO Area. The CIO Area is generally used for data exchanges such as I/O
refreshing with various Units. Words that are not allocated to Units may be
used as work words and work bits in the program only.
Note 1. It is possible to use CIO 0080 to CIO 0999 for I/O words by making the ap-
propriate settings for the first words on the Racks. Settings for the first
words on the Racks can be made using the CX-Programmer to set the first
CIO 0000
CIO 0159
(CIO 0160)
(CIO 0999)
CIO 1000
CIO 1199
CIO 1200
CIO 1499
CIO 1500
CIO 1899
CIO 1900
CIO 1999
CIO 2000
CIO 2959
CIO 2960
CIO 2961
(CIO 2962)
CIO 3100
(CIO 3199)
CIO 3200
CIO 3799
CIO 3800
CIO 6143
15
0
Word
I/O Area
Not used.
Data Link Area
Internal I/O Area
CPU Bus Unit Area
(25 words/Unit)
DeviceNet Area
Not used.
Bit
Special Unit Area
(10 words/Unit)
Internal I/O Area
See note 1.
See note 2.
See note 2.
Serial PLC Link Area
(CJ1M CPU Units only.)
Internal I/O Area
(CJ1M CPU Units with
built-in I/O only.)
Not used.