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APPENDICES
A
Appendix 1 Error Codes
Appendix 1.3 List of error codes (1000 to 1999)
1044
[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: Failure information
■Diagnostic timing
• Always
• 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.
RUN: Off
ERR.:Flashing
CPU Status:Stop
QnUDV
1045
[CPU UNIT DOWN]
(1) The module (built-in I/O or built-in CC-Link)
status differs from that obtained at power-on.
(2) Runaway or failure of the CPU module (built-
in I/O, built-in CC-Link)
• Malfunction due to noise or other causes
• Hardware failure
■Collateral information
• Common information: -
• Individual information: Failure information
■Diagnostic timing
• Always
• 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.
RUN: Off
ERR.:Flashing
CPU Status:Stop
LCPU
1101
[RAM ERROR]
The sequence program storing program memory
in the CPU module is faulty.
■Collateral information
• Common information: -
• Individual information: -
■Diagnostic timing
• At power-on/At reset/When an END instruction
executed
• 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.
RUN: Off
ERR.:Flashing
CPU Status:Stop
QCPU
LCPU
1102
[RAM ERROR]
• The work area RAM in the CPU module is faulty.
• The standard RAM in the CPU module is faulty.
■Collateral information
• Common information: -
• Individual information: -
■Diagnostic timing
• At power-on/At reset/When an END instruction
executed
• 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.
RUN: Off
ERR.:Flashing
CPU Status:Stop
QCPU
LCPU
1103
[RAM ERROR]
The device memory in the CPU module is faulty.
■Collateral information
• Common information: -
• Individual information: -
■Diagnostic timing
• At power-on/At reset/When an END instruction
executed
• Take noise reduction measures.
• When indexing is performed, check the
value of index register to see if it is within
t
he device range.
• 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.
RUN: Off
ERR.:Flashing
CPU Status:Stop
QCPU
LCPU
[RAM ERROR]
• The device memory in the CPU module is faulty.
• The device out of range is accessed due to
indexing, and the device for system is
overwritten.
■Collateral information
• Common information: -
• Individual information: -
■Diagnostic timing
• At power-on/At reset/When an END instruction
executed
Qn(H)
QnPH
QnPRH
1104
[RAM ERROR]
The address RAM in the CPU module is faulty.
■Collateral information
• Common information: -
• Individual information: -
■Diagnostic timing
• At power-on/At reset
• 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.
RUN: Off
ERR.:Flashing
CPU Status:Stop
Q00J/Q00/Q01
Qn(H)
QnPH
QnPRH
Error
code
Error and cause Corrective action
LED status,
CPU status
Corresponding
CPU
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