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Table 6.3 Error Code List for AnUCPU (Continue)
Error
Error
Code
Massage
(D9008)
"END NOT
24
EXECUTE"
(Checked
at
execution
of the END
instruction.)
"MAIN CPU
26
DOWN"
"UNIT
31
VERIFY
ERR"
(Checked
continuousl
y.)
Detailed
Error
CPU
Code
States
(D9091)
241
STOP
Whole program of
specified program
capacity was executed
without executing the
(1) When the
(2) The
STOP
The main CPU is
malfunctioning or faulty.
Stop or
Current I/O module
Continu
information is different
e (set
from that recognized
by
when the power was
parame
turned on.
ter)
(1) The I/O module
Error and Cause
END
instructions.
END
instruction was to be
executed, the
instruction was read
as other instruction
code due to noise.
END
instruction changed
to other instruction
code due to
unknown cause.
(including special
function modules)
connection became
loose or the module
was disconnected
during operation, or
wrong module was
connected.
121
Corrective Action
(1) Reset and run the
CPU again.
If the
same error recurs,
Since this is CPU
hardware error,
consult Mitsubishi
representative.
Since this is CPU
hardware error, consult
Mitsubishi representative
Read detailed error code
using a peripheral
device and check or
replace the module
which corresponds to
the data (I/O head
number).
Or, monitor special
registers D9116 to
D9123 using a
peripheral device and
check or replace the
modules if
corresponding data bit is
"1".

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