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140
Overview of I/O Memory Area
Section 4-1
4-1
Overview of I/O Memory Area
4-1-1
I/O Memory Area
This region of memory contains the data areas that can be accessed as
instruction operands. I/O memory includes the CIO Area, Work Area, Holding
Area, Auxiliary Area, DM Area, Timer Area, Counter Area, Task Flag Area,
Data Registers, Index Registers, Condition Flag Area, and Clock Pulse Area.
Instruction
I/O Memory
Area
Size
Range
Task usage
Allocation
Bit
access
Word
access
Access
Change
from CX-
Programmer
Forcing
bit
status
Read
Write
CIO
Area
I/O Area
Input
Area
272 bits
(17 words)
CIO 0 to
CIO 16
Shared by
all tasks
CP1H CPU
Units and
CPM1A
Expansion
Units or
Expansion I/O
Units
OK
OK
OK
OK
OK
OK
Output
Area
272 bits
(17 words)
CIO 100
to CIO
116
OK
OK
OK
OK
OK
OK
Built-in ana-
log I/O
Areas
(XA CPU
Units only)
Built-in
Analog
Input
Area
4 words
CIO 200
to CIO
203
Built-in analog
input terminals
OK
OK
OK
OK
OK
OK
Built-in
Analog
Output
Area
2 words
CIO 210
to 211
Built-in analog
output termi-
nals
OK
OK
OK
OK
OK
OK
Data Link Area
3,200 bits
(200
words)
CIO 1000
to CIO
1199
Data Links
OK
OK
OK
OK
OK
OK
CPU Bus Unit Area
6,400 bits
(400
words)
CIO 1500
to CIO
1899
CPU Bus
Units
OK
OK
OK
OK
OK
OK
Special I/O Unit Area
15,360
bits (960
words)
CIO 2000
to CIO
2959
Special I/O
Units
OK
OK
OK
OK
OK
OK
Serial PLC Link Area
1,440 bits
(90 words)
CIO 3100
to CIO
3189
Serial PLC
Links
OK
OK
OK
OK
OK
OK
DeviceNet Area
9,600 bits
(600
words)
CIO 3200
to CIO
3799
DeviceNet
Masters using
fixed alloca-
tions
OK
OK
OK
OK
OK
OK
Work Area
4,800 bits
(300
words)
37,504
bits (2344
words)
CIO 1200
to CIO
1499 CIO
3800 to
CIO 6143
---
OK
OK
OK
OK
OK
OK
Work Area
8,192 bits
(512
words)
W000 to
W511
---
OK
OK
OK
OK
OK
OK
Holding Area
8,192 bits
(512
words)
H000 to
H511
(Note 1)
---
OK
OK
OK
OK
OK
OK
Auxiliary Area
15,360
bits (960
words)
A000 to
A959
---
OK
---
OK
Read-
only:
A000 to
A447
Read-only:
A000 to
A447
No
Read/
write:A44
8 to A959
Read/write:
A448 to
A959
Summary of Contents for CP1H-CPU - 05-2006
Page 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Page 3: ...iv...
Page 11: ...xii TABLE OF CONTENTS...
Page 15: ...xvi...
Page 19: ...xx...
Page 31: ...xxxii Conformance to EC Directives 6...
Page 71: ...40 Function Blocks Section 1 5...
Page 133: ...102 Computing the Cycle Time Section 2 7...
Page 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Page 411: ...380 Clock Section 6 8...
Page 519: ...488 Replacing User serviceable Parts Section 10 2...
Page 527: ...496 Standard Models Appendix A...
Page 535: ...504 Dimensions Diagrams Appendix B...
Page 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Page 659: ...628 PLC Setup Appendix G...
Page 665: ...634 Index work words 159 write protection 370...
Page 667: ...636 Revision History...