Table of Contents
Advertisement
8. COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.1 1.2
Remote RUNISTOP
(1)
Remote RUNISTOP control
(a) RUN, STOP, PAUSE and
S T E P - R U N
states are produced by the
following combinations of PC CPU key switch positions and com-
puter commands.
(a)
When a PC CPU is stopped by the remote STOP command given by
an
external com-
puter, that PC CPU cannot be put into the RUN state by the computer connected to the
PC CPU.
(b)
The clearing of data memories
on
receiving a remote RUN instruction depends
on
the
states of special relays M9016 and M9017
as
shown below.
Command
from
computer
PC CPU Key Switch Position
Remote
RUN
Remote
STOP
PC CPU enters the RUN state without clearing remote STOP
OFF
I
OFF
/
data.
I
STEP-RUN
STEP-RUN
STOP
RUN
RUN
STOP
Data Memory State
Special Relay
M9016
I
I
Always reset special relays M9016 and M9017 when data memory clearing is not required.
STOP
STOP
STOP
M9017
ON
After operations
remote RUNISTOP control from the computer are com-
pleted, the remote data will b e lost if the
power supply is turned
OFF or
the PC
CPU is reset.
PAUSE
PAUSE
STOP
Remote STOP data is cleared outside the latch range set in
parameters. (In this case, Link
X
image is not cleared.)
OFF
ON
ONIOFF
PC CPU enters the RUN state after data memory is cleared.
Advertisement
Table of Contents
