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Chapter 6 I/O Specifications
6-5
6.3 Internal Output Numbers
Memory is available as an internal output area in the CPU module. There are three areas: bit dedicated area (R), word
dedicated area (WR), and bit/word shared area (M/WM).
Table 6.8 List of I/O number conventions for external I/O
Data type Numbering convention Example
Bit-dedicated
type
R
Normal area H000 to H7BF
Special area H7C0 to H7FF
Both are expressed as hexadecimals.
R0
R105
R23C
R7E7
Word dedicated
type
<Word>
WR
Normal area H0000 to
Special area HF000 to
Both are expressed as hexadecimals.
WR0
WR11
WR123
WRF004
<Double word>
DR
Normal area H0000 to
Special area HF000 to
Both are expressed as hexadecimals.
Expresses WR for 2 words in continuation.
DR0
DR11
DR123
DRF004
Bit/word shared
type
<Bit>
M
H0000~
M0
M11
M123
<Word>
WM
H000~
M120F
...........
M1200
WM120
WM0
WM11
WM123
<Double word>
DM
H0000 to
Expresses as hexadecimals.
Expresses DM for 2 words in continuation.
DM0
DM11
DM234
• Internal outputs R, WR and DR are completely separate areas. Bit-based operations cannot be performed in the WR.
(Example) Relationships among R100, WR10, and DR10
DR11
R100
WR11
WR10
DR10
WR/DR area Another area
R area
• Because internal outputs M, WM and DM share the same area, bit-based operations are allowed.
(Example) Relationships among M100, WM10, and DM10
DM10
M11F
.......
M10FM110
DM11
M109
M10A
M100
.......
WM11 WM10