9.
TROUBLESHOOTING
/MELSEC-A
9.2.3
Flow chart
used
when
"RUN"
LED
of
the A2CCPU has
turned
off
"RUN" LED has turned
off.
RUN key switch
I""
YES
indicated on
Take corrective action according to the error
code list.
m
After resetting with the RUN key switch of the
CPU module, move the switch to STOP.
r
Consult the sales representative with details.
t
Write END to address
0
with the peripheral
"RUN" LED
turns on.
(2)
Due to excessive noise
(1)
Due to failure of PC parts of bad contact.
"RESET" CPU
'RUN" LED remains
off.
In case of
(1
)
In case
of
(2)
"RUN" LED does not turn on.
Move the RUN key
s
"RUN" LED turns on.
I
Software error.
I
the program.
I
1
I
I
Connect noise suppression circuit, such as
CR,
to noise source.
I
d
i
1
1
1
d
u
1
J
7
4
I
9-4
a
18
IN4
66238-A
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