Mitsubishi MELSEC Q Series Programming Manual page 925

Error
Error Contents and Cause
Code
[MAIN CPU DOWN]
Runaway or failure of the CPU module
• Malfunctioning due to noise or other reason
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• Always
1002
[CPU UNIT DOWN]
Runaway or failure of the CPU module
• Malfunctioning due to noise or other reason
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information: Failure information
• Diagnostic Timing
• Always
[MAIN CPU DOWN]
Runaway or failure of the CPU module
• Malfunctioning due to noise or other reason
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• Always
1003
[CPU UNIT DOWN]
Runaway or failure of the CPU module
• Malfunctioning due to noise or other reason
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information: Failure information
• Diagnostic Timing
• Always
[MAIN CPU DOWN]
Runaway or failure of the CPU module
• Malfunctioning due to noise or other reason
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• Always
1004
[CPU UNIT DOWN]
Runaway or failure of the CPU module
• Malfunctioning due to noise or other reason
• Hardware failure
■Collateral information
• Common Information:-
• Individual Information: Failure information
• Diagnostic Timing
• Always
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.)
LED Status Corresponding
CPU Status CPU
QCPU
LCPU
QCPU
RUN:
Off
ERR.:
Flicker
CPU Status:
Stop
LCPU
QCPU
LCPU
12-5
1
2
3
12
6
6
7
8