Mitsubishi Electric Melsec A Series, Руководство пользователя

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88
Table 6.1 Error Code List for AnNCPU (Continue)
Error
Message
Error
Code
(D9008)
CPU
States
Error and Cause Corrective Action
"RAM
ERROR"
(Checked at
power-on)
20 Stop The CPU has checked if
write and read operations
can be performed properly
to the data memory area of
CPU, and as a result, either
or both has not been
performed.
"OPE.
CIRCUIT
ERR"
(Checked at
power-on)
21 Stop The operation circuit, which
performs the sequence
processing in the CPU,
does not operate properly.
Since this CPU hardware
error, consult Mitsubishi
representative.
"WDT
ERROR"
(Checked at
the execution
of END
processing)
22 Stop Scan time exceeds watch
dog error monitor time.
(1) Scan time of user
program has been
exceeded for some
conditions.
(2) Scan time has
lengthened due to
instantaneous power
failure which occurred
during scan.
(1) Calculate and check the
scan time of user
program and reduce the
scan time using the
CJ instruction or the
like.
(2) Monitor the content of
special register D9005
by use of peripheral
equipment. When the
content is other than 0,
line voltage is
insufficient. When the
content is other than 0,
the power voltage is
unstable.
"SUB-CPU
ERROR"
(Checked
continuously)
23
(During
run)
26
(At
power-on)
Stop Sub-CPU is out of control or
defective. Since this CPU hardware
error, consult Mitsubishi
representative.
"END NOT
EXECUTE"
(Checked at
the execution
of END
instruction)
24 Stop
(1) When the END
instruction was to be
executed, the instruction
was read as other
instruction code due to
noise or the like.
(2) The END instruction
has changed to another
instruction code for
some reason.
Perform reset and run.
If the same error is
displayed again, it is the
CPU hardware error,
consult Mitsubishi
representative.