Special I/O Unit Area - Omron CJ - 09-2009 Operation Manual

Special I/O Unit Area

9-6

Special I/O Unit Area

Forcing Bit Status
386
The Special I/O Unit Area contains 960 words with addresses ranging from
CIO 2000 to CIO 2959. Words in the Special I/O Unit Area are allocated to CJ
to transfer data such as the operating status of the Unit. Each Unit is allocated
10 words based on its unit number setting.
Data is exchanged with Special I/O Units once each cycle during I/O refresh-
ing, which occurs after program execution. The words can also be refreshed
with IORF(097) or FIORF(225) (CJ1-H-R CPU Units only).
Special I/O Unit
Each Special I/O Unit is allocated 25 words based on its unit number, as
shown in the following table.
Unit number Allocated words
0 CIO 2000 to CIO 2009
1 CIO 2010 to CIO 2019
2 CIO 2020 to CIO 2029
3 CIO 2030 to CIO 2039
4 CIO 2040 to CIO 2049
5 CIO 2050 to CIO 2059
6 CIO 2060 to CIO 2069
7 CIO 2070 to CIO 2079
8 CIO 2080 to CIO 2089
9 CIO 2090 to CIO 2099
10 (A) CIO 2100 to CIO 2109
11 (B) CIO 2110 to CIO 2119
12 (C) CIO 2120 to CIO 2129
13 (D) CIO 2130 to CIO 2139
14 (E) CIO 2140 to CIO 2149
15 (F) CIO 2150 to CIO 2159
16 CIO 2160 to CIO 2169
17 CIO 2170 to CIO 2179
95 CIO 2950 to CIO 2959
The function of the 10 words allocated to a Unit depends upon the Special I/O
Unit being used. For details, refer to the Unit's Operation Manual.
Words in the Special I/O Unit Area that are not allocated to Special I/O Units
can be used only in the program.
Bits in the Special I/O Unit Area can be force-set and force-reset.
CPU Unit
Special I/O Unit Area
(10 words/Unit)
I/O re-
freshing,
IORF
(097), or
FIORF
(225)
Section 9-6