A-165
Appendices
CJ2 CPU Unit Software User’s Manual
A-4 Memory Map of PLC Memory Addresses
App
A-4-2 Memory Map
The following table shows the PLC memory addresses of the I/O memory area. The I/O memory area is
backed up by a battery. If there is no battery, the contents of the I/O memory area may become cor-
rupted.
Note Do not access the areas indicated Reserved for system.
Note The contents of the EM Area bank currently specified in the program is stored at these addresses. For exam-
ple, if bank 1 is specified, the same contents as at 20000 to 27FFF will be stored at F8000 to FFFFF.
A-4-2 Memory Map
Classification
PLC memory
addresses (hex)
User addresses Area
I/O memory areas 00000 to 0B7FF Reserved for system.
0B800 to 0B801 TK0000 to TK0031 Task Flag Area
0B802 to 0B83F Reserved for system.
0B840 to 0B9FF A000 to A447 Read-only Auxiliary Area
0BA00 to 0BDFF A448 to A1471 Read/Write Auxiliary Area
A10000 to A11535 Read-only Auxiliary Area
0BE00 to 0BEFF T0000 to T4095 Timer Completion Flags
0BF00 to 0BFFF C0000 to T4095 Counter Completion Flags
0C000 to 0D7FF CIO 0000 to CIO 6143 CIO Area
0D800 to 0D9FF H000 to H511 Holding Area
0DA00 to 0DDFF H512 to H1535 Holding Area
These words are used for function blocks
only.
0DE00 to 0DFFF W000 to W511 Work Area
0E000 to 0EFFF T0000 to T4095 Timer PVs
0F000 to 0FFFF C0000 to C4095 Counter PVs
10000 to 17FFF D00000 to D32767 DM Area
18000 to 1FFFF E0_00000 to E0_32767 EM Area bank 0
20000 to 27FFF E1_00000 to E1_32767 EM Area bank 1 hex
:: :
D8000 to DFFFF E18_00000 to E18_32767 EM Area bank 18 hex
::
F8000 to FFFFF E_00000 to E_32767 EM Area, current bank (See note.)
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