Appendix 1.3 Error Code List (1000 To 1999) - Mitsubishi MELSEC L Series User Manual

Appendix 1.3
The following table shows the error messages, the error contents and causes, and the corrective actions for the error
codes (1000 to 1999).
Error
Error Contents and Cause
Code
[MAIN CPU DOWN]
Runaway or failure of the CPU module
• Malfunction due to noise or other causes
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• Always
1000
[CPU UNIT DOWN]
Runaway or failure of the CPU module
• Malfunction due to noise or other causes
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information: Failure information
■Diagnostic Timing
• Always
[MAIN CPU DOWN]
Runaway or failure of the CPU module
• Malfunction due to noise or other causes
• Hardware failure
• The devices outside the range was accessed
even though device checks are prohibited
(SM237 is on). (This error occurs only when any
of the BMOV, FMOV, or DFMOV instructions is
executed. (Universal model QCPU only))
■Collateral information
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• Always
1001
[CPU UNIT DOWN]
Runaway or failure of the CPU module
• Malfunction due to noise or other causes
• Hardware failure
• The devices outside the range was accessed
even though device checks are prohibited
(SM237 is on). (This error occurs only when any
of the BMOV, FMOV, or DFMOV instruction is
executed.)
■Collateral information
• Common Information:-
• Individual Information: Failure information
■Diagnostic Timing
• Always
130
Error code list (1000 to 1999)
Corrective Action
• Take noise reduction measures.
• Reset the CPU module and run it again. If the
same error code is displayed again, the cause is
a hardware failure of the CPU module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
• Take noise reduction measures.
• Reset the CPU module and run it again. If the
same error code is displayed again, the cause is
a hardware failure of the CPU module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
• 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 code is displayed again, the cause is
a hardware failure of the CPU module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
• Check the devices specified by BMOV, FMOV,
or DFMOV instruction, and correct the device
settings.
LED Status Corresponding
CPU Status CPU
QCPU
LCPU
RUN:
Off
ERR.:
Flicker
CPU Status: QCPU
Stop
LCPU