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3 .
LINKING TO THE A2CCPU
MELSEC-A
(3)
If the execution instruction of the FROM instruction is set to normally
ON, the next FROM instruction information is not stored in the request-
to-communicate registration areas until the processing
of the FROM
instruction being executed is completed and the execution-completed
flag designated by the PRC instruction goes ON.
It is not necessary to provide an interlock to
allow execution of the FROM
instruction after the execution-completed flag is turned ON.
Request-tocommuni-
cate registration area
Execution Conversion
The FROM instruction
information executed in
the following scans is
not stored until M11
Can
be
normally
goes ON.
- - - - - - -
Device for an execution-
completed flag
(4)
When the reset switch on the front of an A64RDC is moved to reset, the
A64RDC returns
to the initial state and performs conversion with
defaults.
Monitor the reset switch ON-detected flag X(n+5) with a sequence
program and, when the flag goes ON, write initial setting data again to
the A64RDC (when A/D conversion is executed with other than defaults),
A64RDC is reset.
Reset switch ON-detected
flag X(n+5)
Reset switch ON-detected
flag reset Y(n+5)
Request-to-communicate
registration
A64RDC
buffer
again
in
scans.
After this, write initial setting data to the
areas
are
cleared
when bothX(n+5)
-
and Y(n+5) go ON.
Turned ON or OFF by
a sequence program.
3 -
23
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