7.
INITIAL SETTING OF TRANSMISSION CONTROL DATA TO
BUFFER MEMORY
MELSEC-A
7.4
Settings In the No-Protocol Mode
This section describes setting methods and gives no-protocol mode ex-
amples.
7.4.1
Setting
the
no-protocol
mod.
receivecompleted
code
(for
recdvo
wtth vrrkbbkngth data)
How to set and modify the receive-completed code and the sequence
program for the receive processing with variable-length data are shown
below.
ietting Method
I
bl5
to
b8 b7
to
bo
[POINTS
I
(1) The completed code can be set to any value which makes 1 byte
in
the range of OOH to FFH. Since the default value setting is ODOAH,
when the
CR
and LF codes are received during the data receive, the
read request is transmitted to the sequence program
(Xnl
is
ON).
If
the default setting has been changed, when a modified completed
code is received during the data receive, the read request is trans-
mitted to the sequence program.
(2)
If
the length of data to complete data receive is also set, the read
request for the received data is transmitted when the completed
code or the set length of data (whichever comes first) is received.
(Xnl is
ON)
(3)
If the completed code is not set, set buffer memory address 100H to
FFFFH. This enables
only
the setting of data length to complete
receive, and the read
of
received data by fixed data length is
enabled.
To
set the end code to
ETX
(03H)
(AJ71C24
I/O
addresses
80
to 9F)
(Sequence Program)
TOP
I
HE
I
H100
]
H0003
I
K1
Write
tho
ASCII
code
for
ElX
(03H)
to
buffer memoy addrew
1
OOH
I
4
d
i
d
1
1
J
1
1
..A
1
Ci
1
Y
7-9
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