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APPENDICES
MELSEC-A
AJ71 C24
?xed at CR, LF
ODH, OAH)
see
Section
No-
Protocol
Bidirec-
tional
Setting the receive
completed code
Setting the
receive-completion
data length
(Data receive by
fixed length)
Sendlreceive data
unit setting
(wordlbyte)
Setting is possible as required.
(Default : CR,
LF
[ODH, OAH])
Setting is possible
as
required.
(Default : 127 words)
:ixed at 127 words
254 bytes)
Setting is possible as required
('words' or 'bytes').
(Default : Words)
Setting is possible as required
excluding the memory area of 100H t o
l l F H
-ixed at 'words'
..
-,xed as below:
Head address
OH
Buffer memory size 80H
Setting the send
buffer memory
Head address
[' D efault
: Buffer memory size 8oH
OH
I
Setting is possible
as
required
excluding the memory area of 100H t o
11 FH.
-.
-,xed
as
below:
Head address
80H
Buffer memory size 80H
Setting receive
buffer memory
Head address
(Default
: Buffer memory size 80H
To clear the received
Jata after
an error
x c u r s ,
the CPU must be
.eset. This means that
h e data received using
:he dedicated protocol is
nlso cleared at the same
:?me.
The data received i n the no-protocol
mode
can
only b e cleared (without
influencing the communications using
the dedicated protocol) by using
s
sequence program.
Receive data clear
request
Data
communications
control with a
Data communications with
a
computer
in the bidirectional mode is possible.
(Possible i n a l - t o - l base system
configuration)
computer
(RS-232C or RS-422)
Data communications with
an
external
device supporting the half-duplex
transmission function can b e
controlled according to the setting by
the
user.
Data
communications control in
the haif-duplex transmission
(RS-232C)
Data communications in the multidrop
link i n which the ratio of computers t o
PC CPUs is 'm : n' is possible.
'm :
n'
multidrop link
APP
-
3
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