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120
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.
Note
1.
A0 to A447 are read only and cannot be written. A448 to A959 are
read/write.
2.
Bits can be manipulated using TST(350), TSTN(351), SET, SETB(532),
RSTB(533), and OUTB(534).
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
1,600 bits
(100
words)
CIO 0 to
CIO 99
Shared by
all tasks
CP1L CPU
Units and CP-
series Expan-
sion Units or
Expansion I/O
Units
OK
OK
OK
OK
OK
OK
Output
Area
1,600 bits
(100
words)
CIO 100
to CIO
199
OK
OK
OK
OK
OK
OK
1:1 Link Area
1,024 bits
(64 words)
CIO 3000
to CIO
3063
1:1 Links
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
Work Area
14,400
bits (900
words)
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 6)
---
OK
OK
OK
OK
OK
OK
Auxiliary Area
15,360
bits (960
words)
A000 to
A959
---
OK
---
OK
Note 1
Note 1
No
TR Area
16 bits
TR0 to
TR15
---
OK
OK
OK
OK
No
No
Data Memory Area
32,768
words
D00000
to
D32767
(Note 7)
---
No
(Note
2)
OK
OK
OK
OK
No
Timer Completion Flags
4,096 bits
T0000 to
T4095
---
OK
---
OK
OK
OK
OK
Counter Completion Flags
4,096 bits
C0000 to
C4095
---
OK
---
OK
OK
OK
OK
Timer PVs
4,096
words
T0000 to
T4095
---
---
OK
OK
OK
OK
No
(Note 4)
Counter PVs
4,096
words
C0000 to
C4095
---
---
OK
OK
OK
OK
No
(Note 5)
Task Flag Area
32 bits
TK0 to
TK31
---
OK
---
OK
No
No
No
Index Registers
16 regis-
ters
IR0 to
IR15
Function
separately in
each task
(Note 3)
---
OK
OK
Indirect
address-
ing only
Specific
instruc-
tions only
No
No
Data Registers
16 regis-
ters
DR0 to
DR15
---
No
OK
OK
OK
No
No
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...