8 TROUBLESHOOTING
MELSEC-Q
8 - 58 8 - 58
*1
: Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
*12
: This applies to the CPU module of function version B or later.
Error
Code
(SD0)
*1
Error Contents and Cause Corrective Action
Corresponding
CPU
1414
• Fault of a loaded module was
detected.
• In a multiple CPU system, a CPU
module incompatible with the
multiple CPU system is mounted.
• Remove the CPU module
incompatible with the multiple CPU
system from the main base unit, or
replace the CPU module with a CPU
module compatible with the multiple
CPU system.
• Reset the CPU module and RUN it
again. If the same error is displayed
again, the intelligent function
module, CPU module or base unit is
faulty. (Contact your local Mitsubishi
representative.)
Q00J/Q00/
Q01
*12
Qn(H)
*12
QnPH
An error is detected on the system
bus.
Reset the CPU module and RUN it
again. If the same error is displayed
again, the intelligent function module,
CPU module or base unit is faulty.
(Contact your local Mitsubishi
representative.)
Q00J/Q00/
Q01
*12
Qn(H)
QnPH
QnPRH
Rem
1415
Fault of the main or extension base
unit was detected.
Reset the CPU module and RUN it
again. If the same error is displayed
again, the intelligent function module,
CPU module or base unit is faulty.
(Contact your local Mitsubishi
representative.)
Q00J/Q00/Q01
Qn(H)
*12
QnPH
QnPRH
1416
System bus fault was detected at PLC
power-on or CPU module reset.
Qn(H)
*12
QnPH
In a multiple CPU system, a bus fault
was detected at power-on or reset.
Reset the CPU module and RUN it
again. If the same error is displayed
again, the intelligent function module,
CPU module or base unit is faulty.
(Contact your local Mitsubishi
representative.)
Q00/Q01
*12
1417
A reset signal error was detected on
the system bus.
QnPRH
1421
Hardware fault at the system
management module AS92R.
This suggests a system management
module AS92R hardware fault.
(Contact your local Mitsubishi
representative.)
Q4AR
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