9.
COMMUNICATIONS
IN
THE
NO-PROTOCOL
MODE
MELSEC-A
(2)
Data sending procedure
I
Procedure
I
Send
requoat
Y(n+c)O
xyx
Turn
ON/OFF
by
program
PC CPU
TO
processing
(Program)
(M
-
hm
POINTS
I
(1)
An error occurs
if
the send data length is greater than the send area,
or equal to
"0".
In this case,
"1'
is
written as transmission error
information to the most significant
bit
(bit
15)
of address
101 H
(error
LED
display area) in the special application memory area. (See
Section
7.3.1
.)
(2)
The send data length wrltten to the head address
of
the send area
is
not transmitted.
Y
7
3
h
9-
16
i,
1
n
U
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