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10.
COMMUNICATIONS IN THE BIDIRECTIONAL MODE
MELSEC-A
10.
COMMUNICATIONS IN THE BIDIRECTIONAL MODE
Bidirectional communications with a computer is possible only when a
computer and an AJ71C24 are linked in a
I : 1
ratio.
Always read this section when the RS-422 and RS-232C interfaces are
used with the dedicated protocol and in the bidirection mode individually
by setting the mode setting switch at the AJ71C24 in any position of
"1"
to '8'.
It is not necessary to read this section when the interface is used with the
POINTJ
Buffer memory used in the bidirectional mode
In sections other than this, buffer memory used in the bidirectional mode
is described as the buffer memory used for the no-protocol mode. Be-
cause the application purposes are the same, simply think of the 'no-
protocol mode' as the 'bidirectional mode'.
Examples:
0
No-protocol mode send area
-
Bidirectional mode send area
0
No-protocol send buffer memory head address setting area
-
Bidirectional send buffer memory head address setting area
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