4.
A2CcPU
/MELSEC-A
(1)
Operation processing
in
m]
state
(a) The
[RUNI
state indicates the state
in
which the PC CPU
operates
a
sequence program repeatedly from step
0
to
the
(END1
(FEND)
instruction.
(b) The output status of the outputs
(Y)
at
the entry to the
(m]
state varies according to the
“(STOP1
to
output” mode set with
a
parameter.
1)
Output of operation state before
After the outputs
(Y)
saved before the entry to the
lml
state are output, the
PC
CPU executes the
sequence program.
2)
Output after operation
Outputs
(Y)
are output after one scan of the sequence
program.
The time required before starting
after the changing the
according to the system configuration; it is
usually between
1
and
3
seconds.
(c) In the state, the processing illustrated in Fig.
4.7
is
repeated until the
o
eration state is changed from
ml
to
~1
or
]dl.
RUN
The status of the outputs
(Y)
which
I
7
VO
modules are refreshed
Sequence program operation
pfrocessing
I
Step
0
I
I
to
m
(FEND)
instruction
I
1
4
m
processing
Operation state check
I
I
4
For details on individual processing in Fig. 4.8, refer to 4.1.1 to 4.1.3.
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