4.A2CCPU
MELSEC·A
No. Name
Function
(3) RUN LED
A2.C
run
status
indicator LED
I
•
ON:
A
sequence
program
operation
is
being
executed with
the
RUN key switch set
in
the
RUN position.
The LEO remains
lit
if an error,
which
permits
sequence operation to continue,
occurs.
•
OFF:
The RUN LED goes
out
in
the
following
cases.
•
'00/200
VACis
nolsupplied
10
the
A2C.
• The RUN key switch is in the STOP position.
• The remote STOP signal is input. See Section 4.2.3.
• The remote PAUSE signal is input.
See
Section
4.2.4.
•
Flicker:
The RUN LED flickers in
the
following
cases.
• An error which causes sequence operation to stop is detected by the self-diag-
nosis
function.
• The latch clear operation is executed. See Section 4.2.2.
(4) ERROR LED
The self-diagnosis error detection status
indicator
LED
I
•
ON:
An error is detected by
the
self-diagnosis function.
The LED remains off when an error for
which
the
indicator
LED
should
remain
OFF by
the
LED
indication
priority
setting is detected.
•
OFF:
The A2C is running correctly.
•
Flicker:
The
annunciator
(F) is set ON by the
sequence
program.
(5) SO LED
The
data
transmission state
indicator
LED (transmission to I/O
modules
and
remote terminal modules)
•
ON:
The
A2C is transmitting
data
to an 1/0 module or remote
terminal
module
correctly.
•
OFF:
The SO LED
goes
out
in
the
follOWing cases.
• Data is not being transmitted an I/O module or remote terminal module.
• There is an error in the Initial data or the initial program error.
• The A2C hardware is faulty.
4-78
I
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