Mitsubishi MELSEC-A A1SCPUC24-R2, Руководство пользователя

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100
Table 6.2 Error Code List for A1SHCPU and A2SHCPU (Continue)
Error
Message
Error
Code
(D9008)
Detailed
Error
Code
(D9092)
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.
Since this CPU
hardware error,
consult Mitsubishi
representative.
"OPE.
CIRCUIT
ERR"
(Checked at
power-on.)
21 — Stop
The operation circuit,
which performs the
sequence processing
in the CPU, does not
operate properly.
"WDT
ERROR"
(Checked at
END
instruction.)
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
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.
CJ