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156
Special I/O Unit Area
Section 4-6
CPU Bus Unit Area
Initialization
The contents of the CPU Bus Unit Area will be cleared in the following cases:
1.
When the operating mode is changed from PROGRAM to RUN or MONI-
TOR mode or vice-versa and the IOM Hold Bit is OFF
2.
When the power is cycled and the IOM Hold Bit is OFF or not protected in
the PLC Setup
3.
When the CPU Bus Unit 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 CPU Bus Unit Area will be re-
tained when FALS(007) is executed.)
4-6
Special I/O Unit Area
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
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).
Each Special I/O Unit is allocated 25 words based on its unit number, as
shown in the following table.
Words in the Special I/O Unit Area that are not allocated to Special I/O Units
can be used in programming.
Forcing Bit Status
Bits in the Special I/O Unit Area can be force-set and force-reset.
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
95
CIO 2950 to CIO 2959
CPU Bus Unit Area
(10 words/Unit)
CPU Bus Unit
CPU Unit
I/O
refreshing or
IORF command
CJ-series Special I/O 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...