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MELSEC-Q
11 TROUBLESHOOTING
Error Code
(SD0)
1
Error Contents and Cause Corrective Action
Corres-
ponding
CPU
1000
1001
1002
1003
1004
QCPU
1005
QCPU
Rem
1006
1007
1008
Run mode suspended or failure of main CPU module
(1) Malfunctioning due to noise or other reason
(2) Hardware fault
1009
Failure of the power supply module, CPU module, main base unit,
extension base unit or extension cable is detected.
(1) Measure noise level.
(2) Reset and establish the RUN status again.
If the same error is displayed again, this suggests a CPU
module hardware error. Contact your nearest Mitsubishi
representative.
QCPU
1010
1011
1012
Entire program was executed without the execution of an END
instruction.
(1) When the END instruction is executed it is read as another
instruction code, e.g. due to noise.
(2) The END instruction has been changed to another instruction
code somehow.
(1) Measure noise level.
(2) Reset and establish the RUN status again.
If the same error is displayed again, this suggests a CPU
module hardware error. Contact your nearest Mitsubishi
representative.
1101
Error in internal RAM/program memory where CPU module
sequence program is stored.
1102 Error in RAM used as CPU module work area.
1103 Internal CPU module device error.
1104 RAM Address error in CPU module.
This suggests a CPU module hardware error. Contact your nearest
Mitsubishi representative.
1105 CPU shared memory fault
(1) Measure noise level.
(2) Reset and establish the RUN status again.
If the same error is displayed again, this suggests a CPU
module hardware error. Contact your nearest Mitsubishi
representative.
QCPU
function
Ver. B
or later
1200
The circuit that performs CPU internal index modification is not
operating properly.
1201 Internal CPU module hardware (logic) does not operate normally.
1202
The circuit that executes sequence processing in the CPU module
does not operate properly.
This suggests a CPU module hardware error. Contact your nearest
Mitsubishi representative.
1203
The operation circuit that conducts index modification in the CPU
module is not operating properly.
1204 The hardware (logic) in the CPU us not operating properly.
1205
The operation circuit that conducts sequence processing in the CPU
in not operating properly.
1206 The DSP operation circuit in the CPU is not operating properly.
This suggests a CPU module hardware error. Contact your nearest
Mitsubishi representative.
Q4AR
There is an output module with a blown fuse.
(1) Check ERR. LED of the output modules and replace the module
whose LED is lit.
(2) Read the common error information with the peripheral device
and replace the fuse at the output module corresponding to the
numerical value (module No.) reading.
Alternatively, monitor special registers SD1300 to SD1331 with
the peripheral device and change the fuse of the output module
whose bit has a value of "1".
QCPU
Rem
There is an output module with a blown fuse.
(1) Check ERR. LED of the output modules and replace the fuse of
the module whose LED is lit.
(2) Read the common error information with the peripheral device
and replace the fuse at the output module corresponding to the
numerical value (module No.) reading.
Alternatively, monitor special registers SD1300 to SD1331 with
the peripheral device and change the fuse of the output module
whose bit has a value of "1".
QnA
Q4AR
1300
(1) There is an output module with a blown fuse.
(2) External power supply for output load is turned off or
disconnected.
(1) Check ERR. LED of the output modules and replace the module
whose LED is lit.
(2) Read the common error information with the peripheral device
and replace the fuse at the output module corresponding to the
numerical value (module No.) reading.
Alternatively, monitor special registers SD1300 to SD1331 with
the peripheral device and change the fuse of the output module
whose bit has a value of "1".
(3) Check whether the external power supply for output load is ON
or OFF.
Q2AS
1310 An interruption has occurred although there is no interrupt module.
One of the individual modules is experiencing hardware problems,
so check the modules. Contact your nearest Mitsubishi
representative and explain the problem with the defective module.
1 Characters in parentheses ( ) indicate the special register numbers where individual information is being stored.