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Special I/O Unit Area
Section 4-6
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.
Special I/O Unit Area
Initialization
The contents of the Special I/O Unit 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 Special I/O 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 Special I/O Unit Area will be
retained when FALS(007) is executed.
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
Summary of Contents for Sysmac CP1H
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Page 3: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised October 2014...
Page 4: ...iv...
Page 10: ...x...
Page 18: ...xviii...
Page 22: ...xxii...
Page 34: ...xxxiv Conformance to EC Directives 6...
Page 76: ...42 Function Blocks Section 1 5...
Page 176: ...142 CP series Expansion I O Unit Wiring Section 3 6...
Page 372: ...338 Analog I O XA CPU Units Section 5 5...
Page 578: ...544 Trouble Shooting Section 8 7...
Page 622: ...588 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Page 668: ...634 Standard Models Appendix A...
Page 744: ...710 Auxiliary Area Allocations by Address Appendix D...
Page 771: ...737 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 772: ...738 Connections to Serial Communications Option Boards Appendix F...
Page 800: ...766 Specifications for External Power Supply Expansion Appendix H...
Page 806: ...772 Index W Work Area 165 work bits 165 work words 165 write protection 379...
Page 808: ...774 Revision History...
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