8.
COMMUNICATIONS
USING
DEDICATED
PROTOCOLS
MELSEC-A
(b) Device ranges when AnACPU dedicated commands are used
The devices and device number ranges that can be used
for
device
memory access operation are described below.
The device designation code consists
of
7
characters.
Leading zeros in the device number (underlined zeros in
Xoooo70,
for
example) can be expressed with a blank code
(20H).
Device
+
Dwko
numbsr =7 charactem
1 character
]
{
Gchanden
(2
characters
for
T/C)
(5
characters
for
T/C)
Bit
Devlce
Word
Device
Device
D.vlm
Number
Docimall
Range
Hexmdoclmml
Dovlce
Device
Number
Doclmml/
Range
Hoxadodmd
(Charmctors)
Exproulon
(Characters)
Expression
,
'
Input
X
XOOOOOO
to
XOOO7FF
1
Decimal
output
Y
YOOOOOO to
YOOO7FF
1
1
value) C CN01023
1
Decimal
1
CNOOOOO to
Internal relay
M
1
Decimal Data register
D
Decimal
Latch relay L
I
LOOOOOO
to
LO08191
Decimal
I
Link register
W
I
t&yFtO
Hexadecimal
Step relay
S
50ooOOo
to
5008191
1
Decimal
I
File register
R
Decimal
Link relay
B
BOOOOOO
to
BOOOFFF
Special register D
Decimal
Annunciator F
Special relay
M
Timer (contact) T
Timer (coil) T
Counter (contact) C
Counter (coil) C
FOOOOOO to
FOO2047
MOO9000
to
MOO9255
TSOOOOO to
TS02047
TCOOOOO to
Decimal
TC02047
CSOlO23
csooooo
to
CCO1023
CCOOOOO to
n
L
0
8-26
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