Table of Contents
Advertisement
8. COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(3)
Monitoring device memory in units of bits
(a) Monitoring the devices registered by the EM command (ACPU con
mon command)
~ e s i ~ n a t i o n
Method
I
St. No. :Station number
Designation in protocol 1 is shown below.
Monitor (bit) command
6
'
The number
of
characters for the number
of points designated by monitor registration (EM)
OFF when the value is
0
(30H)
ON when the value is 1 (31 H)
1
Designation Example1
Computer
Monitoring is executed after registering the monitor data (bit units) in Example
1
of (2) (a)
(Message wait time is 0 msec)
Indicates ihatT123 (contact) is ON.
lndicates that Y60 is OFF.
lndicates thatX40 is ON.
A1 SJ71 C24
I
ik,
HIL
Check sum is calculated
Character area
B
.
.
I
Lg
HIL
i
S t
N a
HIL
A 0
Check sum is calculated
within this range.
n
A
k
A
c
K
I
M 0
I
i
PC
No
HIL
A1 SJ71 C24
I
sum
z
k
HIL
I
No.
S t
HIL
Obl)l,n.(M6*
% I %
I
N a
PC
H I L
MOntOT1BYllb
p$numberdpdnis
derignated
by m M o r
dafaregiSlrahon(0M))
O O F F
s
X
Wa
I
SM
mde
H I L
T O O F F
%ID*
1
0
1
31"
,
D*
,
JI*
E
X
I U I
T
B
,
&,Jh
Advertisement
Table of Contents
