8.
COMMUNICATIONS USING
DEDICATED
PROTOCOLS
MELSEC-A
(3) Station number
The station number is set by the station number setting switch on the
front of the AJ71C24.
It
identify file which AJ71C24
in
a station to
access.
Station numbers must
be
in
the range of OOH to 1 FH
(0
to 31)
in
2-digit
ASCII (hexadecimal).
POINTS~
(1) The station number setting switch is set to a decimal value, but the
station number is specified
in
hexadecimal. Example: Switch setting
'1
0"
corresponds to station number 'OAH" specified
in
the protocol.
(2)
For the global operation, specify station number 'FFH". If
0
to 31 (OOH
to 1 FH) is specified, 'Xn2" turns
ON
at that station number only. For
details, see Section
8.13.
(3) To execute data communications between the computers
in
the m:n
multi-drop
link,
set the station number at the computer side in the
range of 128 to
159
(80H to 9FH).
In
this setting, the station numbers are determined according to the
rule set by the computers.
For details, see Section 6.2.1.
Example:
w-----3
A171
C24
AJ71
C24
AJ71
C24
AJ71
C24
Won
No.
0
Station
No.
1
PC
CPU
No.
FFH
PC
CPU
No.
FFH
PC
CPU
No. FFH
stationNo.2
station
No.
31
PccwNo.FFH
-1
Station numbers
do
not need to be sequential.
Y
8-
12
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