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121
Overview of I/O Memory Area
Section 4-1
3.
Index registers and data registers can be used either individually by task
or they can be shared by all the tasks (the default is individual use by task).
4.
Timer PVs can be refreshed indirectly by force-setting/resetting the Timer
Completion Flags.
5.
Counter PVs can be refreshed indirectly by force-setting/resetting the
Counter Completion Flags.
6.
H512 to H1535 are used as a Function Block Holding Area. These words
can be used only for function block instances (internally allocated variable
area).
7.
Data Memory Area for CPU Units with 14 or 20 I/O Points: D0 to D9999
and D32000 to D32767.
4-1-2
Overview of the Data Areas
■
CIO Area
It is not necessary to input the “CIO” acronym when specifying an address in
the CIO Area. The CIO Area is generally used for data exchanges, such as
I/O refreshing with PLC Units. Words that are not allocated to Units may be
used as work words and work bits in the program.
Note
The parts of the CIO Area that are labelled “not used” may be used in pro-
gramming as work bits. In the future, however, unused CIO Area bits may be
used when expanding functions. Always use Work Area bits first.
I/O Area (Inputs: CIO 0 to CIO 99, Outputs: CIO 100 to CIO 199)
These words are allocated to built-in I/O terminals of CP1L CPU Units and
CP-series Expansion Units or Expansion I/O Units. Input words and output
bits that aren’t allocated may be used in programming.
Input Area
Output Area
Not used (see note).
1:1 Link Area
Work Area
CIO 0
Reserved for system.
CIO 3063
CIO 3800
CIO 1999
CIO 3189
CIO 6143
CIO 100
CIO 99
CIO 199
15
00
Bit
Not used (see note).
Not used (see note).
Not used (see note).
Serial PLC Link Area
CIO 3100
CIO 3000
Word
CIO 1900
Summary of Contents for CP1L - 12-2007
Page 3: ...iv...
Page 9: ...x...
Page 13: ...xiv TABLE OF CONTENTS...
Page 21: ...xxii...
Page 33: ...xxxiv Conformance to EC Directives 6...
Page 65: ...32 Function Blocks Section 1 5...
Page 428: ...395 Clock Section 6 9...
Page 429: ...396 Clock Section 6 9...
Page 523: ...488 Troubleshooting Unit Errors Section 9 4...
Page 531: ...496 Replacing User serviceable Parts Section 10 2...
Page 563: ...528 Auxiliary Area Allocations by Function Appendix C...
Page 611: ...576 Auxiliary Area Allocations by Address Appendix D...
Page 638: ...603 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 639: ...604 Connections to Serial Communications Option Boards Appendix F...
Page 669: ...634 Index...
Page 671: ...636 Revision History...