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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
common commands are used to access
the devices in an
A Z A C P U ( S 1 )
or A3ACPU, the device number ranges described in (b) can
be used.
Use the AnACPU dedicated commands
described in
(2)
to access the
extension devices.
(b)
Device ranges when ACPU common commands are
used
The devices and device number ranges that can be used for
the
device memory access operation are described below.
The device designation code consists of 5 characters.
Leading zeros in the device number (underlined zeros in
X E 7 0 ,
f o r
example) can be expressed
with
a blank code
(20H).
Device
+
Device number
=5 characters
1 character
(2 characters for TIC)
I
4 characters
1
(3 characters for TIC)
1
Device Number
Decimal1
Device Number
Decimal1
Device
Ranges
I
Hexadecimal
I
Device
Range
Hexadecimal
(Characters)
Expression
(Characters)
Expression
Bit Device
Timer
Input X
I
X O O O O to X07FF
I
Hexadecimal
I
value,
(
TNOOO to TN255
I
Decimal
Word Device
Output Y
I
YO000 to Y07FF
I
Hexadecimal
1
Ez2zt
/
CNOOO to CN255
1
Decimal
Internal relay M
/
MOO00 to M2047
1
Decimal
I
Data register D
I
00000 to Dl023
/
Decimal
Latch relay L
I
LOO00 to L2047
1
Decimal
I
Link register W
I
WOO00 to W03FF
I
Hexadecimal
S t e ~ relav S
I
S O O O O to 52047
/
Decimal
I
File reaister R
I
ROO00 to R8191
I
Decimal
Link relay B
I
BOO00 to B03FF
/
Hexadecimal
I
Special register 0
I
D9000 to D9255
1
Decimal
Timer (contact) T
Timer (coil) T
Counter (contact) C
Counter (coil) C
1
1
TSOOO to TS255
TC000 to TC255
CSOOO to CS255
CCOOO to CC255
Decimal
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