Mitsubishi MELSEC L Series User Manual page 134

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
[MAIN CPU DOWN]
Boot operation was performed in the transfer
destination without formatting.
■Collateral information
1005
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• At power-on
[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
■Collateral information
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• Always
1006
[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
1007 [MAIN CPU DOWN]
Runaway or failure of the CPU module
• Malfunction due to noise or other causes
• Hardware failure
■Collateral information
1008
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• Always
132
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.)
• Before performing boot operation by the
parameter, select "Clear program memory" to
clear the program memory.
• 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.)
LED Status Corresponding
CPU Status CPU
QCPU
Qn(H)
QnPH
QnPRH
LCPU
RUN:
Off
ERR.:
Flicker
CPU Status:
Stop
QCPU
LCPU
Qn(H)
QnPH
QnPRH