User`s manual

Troubleshooting Error code list
11 – 28
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
– Take noise reduction measures.
– When indexing is performed, check the value
of index register to see if it is within the device
range.
– Reset the CPU module and RUN it again. If the
same error is displayed again, this suggests a
CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop )
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 over-
written.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset/When an END instruction
executed
Qn(H) (first 5
digits of serial
No. is 08032 or
later)
QnPH (first 5
digits of serial
No. is 08032 or
later)
QnPRH (first 5
digits of serial
No. is 09012 or
later)
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 is displayed again, this suggests a
CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop )
1105
RAM ERROR
The CPU memory 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 is displayed again, this suggests a
CPU module hardware fault. Contact your
local Mitsubishi representative.
OFF Flicker Stop Q00J
Q00
Q01
QnU
RAM ERROR
The CPU shared memory in the CPU module is
faulty.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
Qn(H) (first 5
digits of serial
No. is 04101 or
later)
QnPH
QnPRH
QnU
1106
RAM ERROR
– The battery is dead.
– The program memory in the CPU module is
faulty.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
STOP –> RUN/When an END instruction exe-
cuted
– Check the battery to see if it is dead or not. If
dead, replace the battery.
– Take noise reduction measures.
– Format the program memory, write all files to
the PLC, then reset the CPU module and RUN
it again. If the same error is displayed again,
this suggests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop Qn(H)
QnPH (first 5
digits of serial
No. is 07032 or
later)
QnPRH
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
Tab. 11-3: Error code list (1000 to 1999) for PLC CPUs of MELSEC System Q