c
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r
r
I
L
r
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L-
r
8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(2)
Microcomputer program batch read (ACPU common command)
De8IgnatIon
Method
I
aNo.:Staknnwnbw
Designation in protocol
1
is shown below.
Microcomputer program batch read command
(UR
for main and
VR
for
sub program)
ChUSCtMW88A
Ill
II
I
Number of characters
=
(Number
of
bytes)
x
2.
1 address
usor
2
charactors.
in 2 digit.
(hexadecimal).
Thordoro,
1
addrou is oxpro.oed
HlL HlL
I
Ill
I
I
HlL HlL
J
I
Ill1
Ill1
I
I
An1 c24 Designatio;
of
the
Sum
E
YkrocompuCrmnm
#:
gL
8
range to be read from
HIL
Ill1
Ill1
HILHIL
xcod.
TCW
I
I
I
No.
No.
;
,
I--/
Character area B
'POINTI
To
set the number of bytes, the following conditions must be met:
0
1
s
number of bytes
s
128
0
(Head address)
+
((number
of
bytes)
-
11
=microcomputer program
capacity
De8IgnrtIon
Example
I
To
read
6
bytes
of
a
microcomputer program beginning with address
03E8H
(lo00
in decimal)
in
the PC CPU
of
station number'0". (Message wait time is
0
msec)
1
Chock sum is calcul8t.d within
I!I
I
1
E
N
(Sum check code is added by
o
0
o
3
E
810
I
o
u
R
F
F
o o
I
Mw%,D*cb,&l
q
SL,Y.D*&UILa*&,B*XL,B
U.,&
aka,&
the A171 C24.)
I
A
thir
range
Computer
Q
COOFF
K
.
b?
I'I""""""'II'
AJ71C24 -Check sum is calculated
IIIII
within this range
Iflo
OIF
~13
4)l
A17
BjB
F]1
215
S
Indicates that:
(1) the contents of addroas 03E8H
is
34H,
(1) (2)
(3)
(4)
(5)
(6)
(2) the contents
of
address 03E9H is lAH,
(3) the contents of address 03EAH
is
7BH,
(4) the contents of address O3EBH
is
BFH,
(5)
the contents
of
addross O3ECH is 12H, and
(6)
the contents of address O3EDH is 58H.
------
P
8-95
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