142
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
CP-series
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 UNITS - PROGRAMMING 05-2007
Page 2: ......
Page 3: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised March 2009...
Page 4: ...iv...
Page 10: ...x...
Page 18: ...xviii...
Page 22: ...xxii...
Page 34: ...xxxiv Conformance to EC Directives 6...
Page 174: ...140 CP series Expansion I O Unit Wiring Section 3 6...
Page 370: ...336 Analog I O XA CPU Units Section 5 5...
Page 552: ...518 Trouble Shooting Section 8 7...
Page 595: ...561 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Page 598: ...564 Sample Application Section 9 12...
Page 642: ...608 Standard Models Appendix A...
Page 652: ...618 Dimensions Diagrams Appendix B...
Page 745: ...711 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 746: ...712 Connections to Serial Communications Option Boards Appendix F...
Page 776: ...742 PLC Setup Appendix G...
Page 778: ...744 Specifications for External Power Supply Expansion Appendix H...
Page 786: ...752 Revision History...