Mitsubishi MELSEC L Series User Manual page 140

Error
Error Contents and Cause
Code
[RAM ERROR]
The destruction of the data stored in the standard
RAM is detected.
■Collateral information
1164
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• When instruction executed
[RAM ERROR]
The internal memory in the CPU module is faulty.
■Collateral information
• Common Information:-
1166
• Common Information:-
■Diagnostic Timing
• Always
[RAM ERROR]
The RAM of the CPU module (built-in I/O) is faulty.
■Collateral information
• Common Information:-
1170
• Common Information: Failure information
■Diagnostic Timing
• At power-on/At reset
[RAM ERROR]
The RAM of the CPU module (built-in I/O) is faulty.
■Collateral information
1171 • Common Information:-
• Common Information: Failure information
■Diagnostic Timing
• Always
[RAM ERROR]
The RAM of the CPU module (built-in I/O) is faulty.
■Collateral information
• Common Information:-
1172
• Individual information: Failure information
■Diagnostic Timing
• At power-on/At reset
[OPE. CIRCUIT ERR.]
The operation circuit for index modification in the
CPU module does not operate normally.
■Collateral information
1200
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• At power-on/At reset
[OPE. CIRCUIT ERR.]
The hardware (logic) in the CPU module does not
operate normally.
■Collateral information
1201
• Common Information:-
• Individual Information:-
■Diagnostic Timing
• At power-on/At reset
138
Corrective Action
Take noise reduction measures.
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.)
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
*29
QnU
L26CPU-BT
L26CPU-PBT
Q50UDEHCPU
Q100UDEHCPU
RUN:
Off
ERR.:
LCPU
Flicker
CPU Status:
Stop
QCPU
LCPU