8 TROUBLESHOOTING
MELSEC-Q
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*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
Error
Code
(SD0)
*1
Error Contents and Cause Corrective Action
Corresponding
CPU
6050
The function inexecutable in the debug
mode or operation mode (backup/
separate mode) was executed.
Execute the function executable in the
debug mode or operation mode
(backup/separate mode).
QnPRH6060
In a redundant system, the operation
mode (backup/separate) differs
between the control system and
standby system.
Match the operation modes of the
control system and standby system.
6061
6062
Both System A and B are in the same
system status (control system).
Power the CPU module (System B)
which resulted in a stop error, OFF and
then ON.
QnPRH
6100
A CPU module tracking memory error
was detected during initial.
Hardware fault of the CPU module.
(Please contact your local nearest
Mitsubishi or sales representative,
explaining a detailed description of the
problem. Change the CPU modules in
order of the standby system CPU
module and control system CPU
module.)
Q4AR
• An error (e.g. retry limit exceeded)
occurred in tracking data
transmission.
(This error may be caused by
tracking cable removal or other
system power-off (including reset).)
• The error occurred at a startup since
the redundant system startup
procedure was not followed.
• Check the CPU module or tracking
cable. If the error still occurs, this
indicates the CPU module or
tracking cable is faulty. (Contact
your local Mitsubishi representative,
explaining a detailed description of
the problem.)
• Confirm the redundant system
startup procedure, and execute a
startup again.
QnPRH
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