Table of Contents
Advertisement
8. COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(4)
Monitoring device memory in units of words
(a) Monitoring the device registered by the WM command (ACPU com-
mon command)
esignation Method]
St. No. :Station number
Designation in protocol
1
is shown below.
Monitor (bit) command
I
The number of characters for the number
of points designated by monitor registration (WM)
1 point of device uses 4 characters
Therefore, a I-word data is expressed
in
4 digits
(hexadecimal)
esignation Example1
Monitoring is executed after registering the monitor data (word units) as in Example
2
of
(2)
(a) (Message wait time is
0
msec)
I
I
I
I
E
Message
,Sgk
Character area
B
HlL HIL
I
H I L
Check sum is calculated
within this range.
-
I
I
I l l 1
I I I I
I
AJ71 C24
s.
PC
Monitor
. .
I
Moni t or
7
zgk
;
No.
No.
reults
I
I
resulfs
code
st
N O
H I L
A
1 1 -
PC
NO.
H ~ L
Indicates that the data in D l 5 is 1234H
d
(4660 in decimal).
Indicates that the data in W1I E is 0050H
(80 in decimal).
c - - - - 4 \ .
Indicates that the present value in TI23 is 0064H
.
1
(100 in decimal).
I
0
7
6
I
4
O
O
o
o
o
l
l
l
o
l
l
o
O
l
o
O
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
6
6
6
6
6
6
5
6
6
6
6
6
6
6
6
6
F
E
O
C
B
A
9
8
7
6
5
d
3
2
1
0
Check sum is oalculated within this range.
A
C
K
E"
Computer
1 9 F F
3 , . , 3 9 " A L 4 "
E
N
Q
1 9 F F M N O C l
I
,
7
Advertisement
Table of Contents
