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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.13
Global Function
The global function is used to switch the Xn2 input signal at each
AJ71C24 in all stations connected to the computer by the multidrop link.
This function is used for emergency instructions simultaneous start,
etc., to the PC CPU.
8.1 3.1 Commands and control
(1)
ACPU common commands
(2) Control
1
This function switches the Xn2 input signal at each AJ71C24 in all
stations linked to the computer.
(a) Xn2 is determined by the I10 addresses of the AJ71C24s.
Note :
o
........
Executable
Example: If the
1 1 0
addresses are
90
to AF, Xn2 is X92.
(b) Designate the station number in the control protocol as
FFH
Processing
Turns ONiOFF Xn2
o f
the AJ71C24 loaded i n each PC
CPU system.
Item
Global
State of
PC C P U
Designating a number other than FFH causes the Xn2 of the
AJ71C24 at the designated station number to turn ONIOFF.
During
STOP
0
(c) This function is a command from the computer. A reply is not given
by the AJ71 C24.
Command
(d) Xn2 is cleared from any station when the power supply to the station
is turned OFF or when the CPU or the station is reset.
symbol
GW
During RUN
ASCII
Code
47H, 57H
S W 2 2
ON
0
S W 2 2
OFF
0
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