Mitsubishi Electric MELSEC iQ-R Series User Manual page 247

Error Error name
code
3E41H WDT error
3E45H Hardware failure
3E48H Memory error
3E49H Memory error
3E4AH Memory error
Error details and cause
• The system watchdog timer controlled
by the system detected an error.
(1) The system WDT monitoring time is
too short.
(2) An operation that increases the CPU
utilization by the system task (writing
parameter) was executed.
(3) At a stop error occurrence, the
station using block data assurance per
station of the network was accessed.
(4) The initial processing of the bus
control took time.
(5) CPU module drives recklessly or it
breaks down. (Malfunction by noise etc.
and Hardware error)
• A hardware failure has been
detected.
• An error has been detected in the
memory.
• An error has been detected in the
memory.
• An error has been detected in the
memory.
Corrective action
• Turn the power of the CPU module
OFF and ON or reset the hardware.
• Prolong the system WDT monitoring
time.
• Review the user program not to
access the station that is used block
data assurance per station of the
network at a stop error occurrence.
• Take measures to reduce noise.
• Check that the MELSECWinCPU is
securely installed in the base unit,
and the ambient environment is within
the general specification range.
If the error occurs even after the above
checks, the possible cause is a
hardware failure of the CPU module.
Please contact your local Mitsubishi
Electric sales office or representative.
• Take measures to reduce noise.
• Turn the power of the CPU module
OFF and ON or reset the hardware. If
the same error code is displayed
again, the possible cause is a
hardware failure of the CPU module.
Please contact your local Mitsubishi
Electric sales office or representative.
• Take measures to reduce noise.
• Format the memory. Write all files to
the CPU module. Then, turn the
power of the CPU module OFF and
ON or reset the hardware, and run it
again. If the same error code is
displayed again, the possible cause is
a hardware failure of the CPU
module. Please contact your local
Mitsubishi Electric sales office or
representative.
• Take measures to reduce noise.
• Format the memory. Write all files to
the CPU module. Then, turn the
power of the CPU module OFF and
ON or reset the hardware, and run it
again. If the same error code is
displayed again, the possible cause is
a hardware failure of the CPU
module. Please contact your local
Mitsubishi Electric sales office or
representative.
• Take measures to reduce noise.
• Format the memory. Write all files to
the CPU module. Then, turn the
power of the CPU module OFF and
ON or reset the hardware, and run it
again. If the same error code is
displayed again, the possible cause is
a hardware failure of the CPU
module. Please contact your local
Mitsubishi Electric sales office or
representative.
33.1 Error Codes for Self-diagnostics
Stop/ Diagnostic
continue timing
Stop Always
Stop Always
Stop Always
Stop Always
Stop Always
33 ERROR CODE LIST
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