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CPU Bus Unit Area
Section 4-5
Link Area Initialization
The contents of the Link Area will be cleared in the following cases:
1.
When the operating mode is changed from PROGRAM mode to
RUN/MONITOR mode or vice-versa and the IOM Hold Bit is OFF
2.
When the power is cycled
3.
When the Data Link Area is cleared from the CX-Programmer
4.
When PLC operation is stopped when a fatal error other than an
FALS(007) error occurs. (The contents of the Link Area will be retained if
FALS(007) is executed.)
4-5
CPU Bus Unit Area
The CPU Bus Unit Area contains 400 words with addresses ranging from
CIO 1500 to CIO 1899. Words in the CPU Bus Unit Area can be 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 once each cycle during I/O refreshing,
which occurs after program execution. (Words in this data area cannot be
refreshed with immediate-refreshing or IORF(097).)
Each CPU Bus Unit is allocated 25 words based on its unit number, as shown
in the following table.
The function of the 25 words depends upon the CPU Bus Unit being used. For
details, refer to the Unit’s operation manual.
Words in the CPU Bus Unit Area that aren’t allocated to CPU Bus Units can
be used in programming.
Forcing Bit Status
Bits in the CPU Bus Unit Area can be force-set and force-reset.
Unit
number
Allocated words
Unit
number
Allocated words
0
CIO 1500 to CIO 1524
8
CIO 1700 to CIO 1724
1
CIO 1525 to CIO 1549
9
CIO 1725 to CIO 1749
2
CIO 1550 to CIO 1574
A
CIO 1750 to CIO 1774
3
CIO 1575 to CIO 1599
B
CIO 1775 to CIO 1799
4
CIO 1600 to CIO 1624
C
CIO 1800 to CIO 1824
5
CIO 1625 to CIO 1649
D
CIO 1825 to CIO 1849
6
CIO 1650 to CIO 1674
E
CIO 1850 to CIO 1874
7
CIO 1675 to CIO 1699
F
CIO 1875 to CIO 1899
CPU Bus Unit Area
(25 words/Unit)
CPU Bus Unit
CPU Unit
I/O
refreshing
CPU Bus Unit
Содержание CP1H-CPU - 05-2006
Страница 1: ...OPERATION MANUAL CP1H CPU Unit SYSMAC CP Series CP1H X40D CP1H XA40D CP1H Y20DT D Cat No W450 E1 02...
Страница 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Страница 3: ...iv...
Страница 11: ...xii TABLE OF CONTENTS...
Страница 15: ...xvi...
Страница 19: ...xx...
Страница 31: ...xxxii Conformance to EC Directives 6...
Страница 71: ...40 Function Blocks Section 1 5...
Страница 133: ...102 Computing the Cycle Time Section 2 7...
Страница 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Страница 411: ...380 Clock Section 6 8...
Страница 519: ...488 Replacing User serviceable Parts Section 10 2...
Страница 527: ...496 Standard Models Appendix A...
Страница 535: ...504 Dimensions Diagrams Appendix B...
Страница 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Страница 659: ...628 PLC Setup Appendix G...
Страница 665: ...634 Index work words 159 write protection 370...
Страница 667: ...636 Revision History...