I/O Memory Area Structure - Omron CJ2 CPU UNIT SOFTWARE User Manual

6 I/O Memory Areas
6-1-2

I/O Memory Area Structure

Area Size
I/O Area 2,560 bits
(160 words)
Data Link 3,200 bits
Area (200 words)
Synchronous 1,536 bits
Data Refresh (96 words)
Area
CPU Bus Unit 6,400 bits
Area (400 words)
Special I/O 15,360 bits
Unit Area (960 words)
Pulse I/O 32 bits (4
Area words)
Serial PLC 1,440 bits (90
Link Area words)
DeviceNet 9,600 bits
Area (600 words)
Internal I/O 3,200 bits
Area (200 words)
37,504 bits
(2,344 words)
Work Area 8,192 bits
(512 words)
*5 8,192 bits
Holding Area
(512 words)
Auxiliary Area 48,128 bits
(3,008 words)
*1 The I/O Area can be expanded to include CIO 0160 to CIO 0999 by changing the first words allocated to specified Units.
Settings for the first words can be made using the CX-Programmer to set the first words in the I/O tables. The setting
range for the first words is CIO 0 to CIO 900.
*2 If the I/O Memory Hold Flag (A500.12) is ON, the memory values will be maintained when the operating mode is
changed. If, in addition, the PLC Setup is set to hold the status of the I/O Memory Hold Flag at startup (IOM Hold Bit
parameter), the memory values will be maintained when the power supply is turned ON.
*3 This area is supported only by CJ2H CPU Units. "Synchronous Units" are CPU Bus Units and Special I/O Units that sup-
port synchronous unit operation.
*4 This area is supported only by CJ2M CPU Units.
*5 H512 to H1535 can be set for use only as function block memory or SFC memory.
*6 A960 to A1471 and A10000 to A11535 were added to expand the Auxiliary Area in CJ2 CPU Units. These words cannot
be accessed by CPU Bus Units, Special I/O Units, PTs, and Support Software that do not specifically support the CJ2
CPU Units.
Only the following CPU Bus Units and Special I/O Units specifically support the CJ2 CPU Units.
• EtherNet/IP Unit:
• Position Control Units:
• Analog Input Unit:
• Analog Output Unit:
6-4
External I/O
Range
allocation access
CIO 0 to Basic I/O Units OK
*1
CIO 159
CIO 1000 to Data links or OK
CIO 1199 PLC links
(conditional)
CIO 1200 to Synchronous OK
CIO 1295 *3
Units
CIO 1500 to CPU Bus OK
CIO 1899 Units (condi-
tional)
CIO 2000 to Special I/O OK
CIO 2959 Units (condi-
tional)
CIO 2960 to Pulse I/O OK
CIO 2963 *4
Modules
CIO 3100 to *4 OK
Linked PLC
CIO 3189
CIO 3200 to DeviceNet OK
CIO 3799 Master (fixed
allocations)
(conditional)
CIO 1300 to --- OK
CIO 1499
CIO 3800 to
CIO 6143
W000 to W511 --- OK
H000 to H511 --- OK
A000 to A447 --- OK
A448 to A959 --- OK
A960 to --- OK
*6
A1471
A10000 to --- OK
*6
A11535
CJ1W-EIP21
CJ1W-NC214, CJ1W-NC234, CJ1W-NC281, CJ1W-NC414, CJ1W-NC434, CJ1W-NC481,
and CJ1W-NC881
CJ1W-AD042
CJ1W-DA042V
Access
Bit Word from Pro-
access gramming
Read Write
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK OK OK
OK OK No No
OK OK OK OK
OK OK OK OK
OK OK No No
Change Status at
Forc-
startup
ing bit
or mode
status
Device change
*2 OK
Cleared
OK
OK
OK
OK
OK
OK
OK
OK
Cleared OK
*2
Main- OK
tained
Depends No
on the
address
CJ2 CPU Unit Software User's Manual
Refer-
ence
6-8
6-13
6-14
6-15
6-16
6-17
6-18
6-19
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6-20
6-21
6-23