User`s manual

Error code list Troubleshooting
MELSEC System Q, Hardware 11 – 29
1107 RAM ERROR
The work area RAM in the CPU module is faulty.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
This suggests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop QnPRH
1108
1109
RAM ERROR
The work area RAM in the CPU module is faulty.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
Always
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)
1110
TRK. CIR. ERROR
A fault was detected by the initial check of the
tracking hardware.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
Always
This suggests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop QnPRH
1111
TRK. CIR. ERROR
A tracking hardware fault was detected.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
1112 TRK. CIR. ERROR
A tracking hardware fault was detected during
running.
– The tracking cable was disconnected and
reinserted without the standby system being
powered off or reset.
– The tracking cable is not secured by the con-
nector fixing screws.
– The error occurred at a startup since the
redundant system startup procedure was not
followed.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
During running
– Start after checking that the tracking cable is
connected. If the same error is displayed
again, the cause is the hardware fault of the
tracking cable or CPU module.
Contact your local Mitsubishi representative.
– Confirm the redundant system startup proce-
dure, and execute a startup again. For details,
refer to the manual of the redundant system.
OFF Flicker Stop QnPRH
1113
1115
TRK. CIR. ERROR
A fault was detected by the initial check of the
tracking hardware.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
This suggests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop 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