User`s manual

Troubleshooting Error code list
11 – 30
1116
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
1150
RAM ERROR
The memory of the CPU module in the Multiple
CPU high speed transmission area 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 QnU (except
Q00UJ-, Q00U-,
Q01U- and
Q02UCPU)
1160
RAM ERROR
The program memory in the CPU module is
overwritten.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At program execution
– 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 sug-
gests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop )
1161
RAM ERROR
The data of the device memory built in the CPU
module is overwritten.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At program execution
– Take noise reduction measures.
If the same error is displayed again, this sug-
gests a CPU module hardware fault.
Contact your local Mitsubishi representative.
1162
RAM ERROR
The error of the data held by the battery in the
CPU module is detected. (It occurs when the
automatic format is not set.)
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
– Take noise reduction measures.
– Change the CPU main body or SRAM card
battery.
If the same error is displayed again, this sug-
gests a CPU module hardware fault.
Contact your local Mitsubishi representative.
1164
RAM ERROR
The destruction of the data stored in the stan-
dard RAM is detected.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
When instruction executed
Take noise reduction measures.
If the same error is displayed again, this sug-
gests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop Q10UD(E)H-,
Q13UD(E)H-,
Q20UD(E)H-,
Q26UD(E)HCPU
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