4.
A2CcPU
/MELSEC-A
(c) The ERROR LED is not
lit
if an error, for which error
indication priority order has not been set, occurs. If
all
bits
are
"0"
in
09038
and D9039, for example, the
ERROR
LED
will not
be
lit
when any error of error item numbers
1
to
6
occurs.
In this case, however,
the
MW88
(CPU error flag) is set and
the corresponding error code is stored
in
D9009 (CPU error
rwister).
(2) Relationship between priority order and annunciator resetting
(a)
If
an
annunciator
(E::)
is turned
ON,
the number of
that
annunciator is stored in 09009 and 09125 to D9132.
Once the annunciator number is set in the registers,
the
number cannot be reset using the
RST
F[:l
or
LEDR
instruction if an error for which higher error indication
priority
is
set than the annunciator
ON.
To reset the set annunciator number
at
an occurrence of
another error, set a priority for the annunciator error item
number 1.
IWii
1
I
The
priority
order
active when the
power
is
turned
ON
or
the
CPU
is
reset
b.com
effecthe. Changing tho
priority
simply
in the
registem
is
ignored
unless
the
CPU
is
reset
or
the
power
is
turned
off
once
and then
back
on again.
U
1
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