Cpu Bus Unit Area - Omron CJ2 - 02-2010 User Manual

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CPU Bus Unit Area

The CPU Bus Unit Area addresses range from CIO 1500 to CIO 1899 for words and CIO 1500.00 to
CIO 1899.15 for bits.
Words in the CPU Bus Unit Area are allocated to CPU Bus Units to transfer data, such as the operating
status of the Unit. Each Unit is allocated 25 words based on the Unit's unit number setting.
Data is exchanged with CPU Bus Units at the following times.
• During the I/O refresh period
• When DLNK(226)) is executed
Each CPU Bus Unit is allocated 25 words based on its unit number, as shown in the following table.
Unit number
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
The function of the 25 words depends on the CPU Bus Unit being used. For details, refer to the Unit's
operation manual.
Words in the CPU Bus Unit Area that are not allocated to CPU Bus Units can be used only in the pro-
gram.
CJ2 CPU Unit Software User's Manual
CPU Unit

CPU Bus Unit Area

(25 words/Unit)
Allocated words
CIO 1500 to CIO 1524
CIO 1525 to CIO 1549
CIO 1550 to CIO 1574
CIO 1575 to CIO 1599
CIO 1600 to CIO 1624
CIO 1625 to CIO 1649
CIO 1650 to CIO 1674
CIO 1675 to CIO 1699
CIO 1700 to CIO 1724
CIO 1725 to CIO 1749
CIO 1750 to CIO 1774
CIO 1775 to CIO 1799
CIO 1800 to CIO 1824
CIO 1825 to CIO 1849
CIO 1850 to CIO 1874
CIO 1875 to CIO 1899
6 I/O Memory Areas
CPU Bus Unit
I/O
refresh-
ing
6
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