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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.1
1.2
R.mote
RUN/STOP
(1)
Remote RUN/STOP control
(a) RUN, STOP, PAUSE and STEP-RUN states are produced by the
following combinations of
PC
CPU key switch positions
and
com-
puter commands.
PC
CPU
Koy
swnch ~ornlon
RUN STOP PAUSE STEP-RUN
(a) When a PC CPU is stopped by the remote STOP command given by an external com-
PC CPU.
puter, that PC CPU cannot
be
put into the RUN date by the computer connected
to
the
(b) The clearing
of
data memories on receiving a remote RUN instruction depends on the
states
of
special relays
MW16
and
"17
as
8hown below.
OFF
PC
CPU enter8 the RUN
rtate
without clearing remote STOP
data.
Remote STOP data
is
cleared outside the latch range set in
parameten. (In this case, Link
X
image
ir
not cleared.)
OFF
ON
PC CPU enters the
RUN
state after data memory is cleared.
WOFF
IREMARK]
Always reset special relays
Wl6
and
"17
when data memory clearing is not required.
POINT1
After operations remote RUN/STOP control from the computer are com-
pleted, the remote data
will
be
lost
if
the power supply is turned
OFF
or
the PC CPU is reset.
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