Mitsubishi Melsec-Q Series User Manual page 359

12.3.3 Error code list (1000 to 1999)
The following shows the error messages from the error code 1000 to 1999, the contents and
causes of the errors, and the corrective actions for the errors.
Error
Error Contents and Cause
Code
[MAIN CPU DOWN]
Runaway or failure of CPU module or failure of
main CPU
• Malfunctioning due to noise or other reason
• Hardware fault
1000
■Collateral information
• Common Information:–
• Individual Information:–
■Diagnostic Timing
• Always
[MAIN CPU DOWN]
Runaway or failure of CPU module or failure of
main CPU
• Malfunctioning due to noise or other reason
• Hardware fault
• Accessed to outlying devices with the device
range checks disabled (SM237 is turned on)(This
1001 error occurs only when BMOV, FMOV, and
DFMOV instructions are executed.)
(Universal model QCPU only)
■Collateral information
• Common Information:–
• Individual Information:–
■Diagnostic Timing
• Always
1002 [MAIN CPU DOWN]
Runaway or failure of CPU module or failure of
1003
main CPU
• Malfunctioning due to noise or other reason
• Hardware fault
■Collateral information
1004
• Common Information:–
• Individual Information:–
■Diagnostic Timing
• Always
[MAIN CPU DOWN]
Runaway or failure of CPU module or failure of
main CPU
• Malfunctioning due to noise or other reason
• Hardware fault
■Collateral information
• Common Information:–
• Individual Information:–
■Diagnostic Timing
1005
• Always
[MAIN CPU DOWN]
Boot operation was performed in the transfer desti-
nation without formatting.
■Collateral information
• Common Information:–
• Individual Information:–
■Diagnostic Timing
• At power ON
Corrective Action
• Take noise reduction measures.
• Reset the CPU module and RUN it again.If the
same error is displayed again, this suggests a
CPU module hardware fault.(Contact your local
Mitsubishi representative.)
• Take noise reduction measures.
• Reset the CPU module and RUN it again.If the
same error is displayed again, this suggests a
CPU module hardware fault.(Contact your local
Mitsubishi representative.)
• Check the devices specified by BMOV, FMOV,
and DFMOV instructions and correct the device
settings.
(Universal model QCPU only)
• Take noise reduction measures.
• Reset the CPU module and RUN it again.If the
same error is displayed again, this suggests a
CPU module hardware fault.(Contact your local
Mitsubishi representative.)
• Take noise reduction measures.
• Reset the CPU module and RUN it again.If the
same error is displayed again, this suggests a
CPU module hardware fault.(Contact your local
Mitsubishi representative.)
• Before performing boot operation by the parame-
ter, select "Clear program memory" to clear the
program memory.
CHAPTER12 TROUBLESHOOTING
LED Status Corresponding
CPU Status CPU
QCPU
RUN:
Off
ERR.:
Flicker
CPU Status:
Stop
Qn(H)
QnPH
QnPRH
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