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9. COMMUNICATIONS IN THE NO-PROTOCOL MODE
MELSEC-A
(2)
Writing data to the send area (TO, TOP, DTO, DTOP)
Data written to the no-protocol send area (default: OH to
7FH).
PC CPU
AJ71 C24
I
Buffer memory (nc-protocol send area)
I
Send
Send
command
completed
XnO
(Send request)
(Send completed)
Send
request
Y(n+1)
0
Sets the send data and send data length when
the send command signal
&[I)
is turned ON.
Data size
(1)Writing data length setting
(2)Writing send data
Writes the send data length and send data to the buffer
memory.
Turns ON the send request signal (Y(n+l)O) after
the data is written.
(5) Canceling send request
Turns OFFthe send request signal when the data
send completed signal &no) is turned ON.
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