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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.7.6
Testing device memory in units of bit (random write)
(a) Using the BT command (ACPU common command)
esignation Methodl
Designation in protocol 1 is shown below.
St. No. :Station number
PUIN I
To designate the device range, the following condition must be met:
r
I
Test (random write,
bit)
command)
\
Character area C
I
.I
5
number of device points
5
20
I
:omputer
To write ON to M50, OFF to B31A, and ON to Y2F in station
"5".
(Message wait time is 0 msec)
I
St
No.
H I L
IJ71C24
1 character
0
(30H) indicates OFF, and
1 (31 H) indicates ON.
Check sum is calculated within this range
.
q,
I
PC
Na
H l L
hmputer
A
I
I
E
Q
m.
I
S t
No.
H I L
1J71
C24
/
Set (ON)
Reset (OFF)
Set
(ON)
~ - g e
waittime
I
PC
Na
H I L
N
O
~
F
F
B
T
O
~o.,s,rs.,~rz.,~~~)~
c
A
K
I
Number
Of
device p i n k
(Zsharactern
Fexadecimai)
H
I
I
o
3
X H
,
3.
O S F F
I
I
I
I
I
DeMce
SeV
(sshamnerr)
1
e % d
I
I
I
I
I
I
M
O
O
S
O
~
I
M M , ~ . , J ~ . , ~ . , ~ , ~ J I .
I
I
I
I
I
Dejlce
Sew
(Ichamslen)
1
I
l
l
l
l
l
0
0
3
1
A / O Y
+ z . , ~ o . , u . , j ~ . , e . ~ a .
I
0
0
2
~
1
1
I
s s . , ~ . , i c . , j ? . , r a . , ~ ~ .
o
B
3.
,a.
I
I
I
I
I
I
Device
S e V
(5 characters)
I
reset
I
\ I l l 1
I
t k
H I L
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