Mitsubishi QJ71LP21 Reference Manual page 351

8 TROUBLESHOOTING
Error
Code Error Contents and Cause
*1
(SD0)
• The tracking cable was removed.
• The tracking cable became faulty
6130 while the CPU module is running.
• The CPU module side tracking
hardware became faulty.
• The other system did not respond
during initial communication at
power ON/reset.
6140
• The error occurred at a startup since
the redundant system startup
procedure was not followed.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
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Corrective Action
• If the tracking cable was removed,
connect the tracking cable to the
connectors of the CPU modules of
the two systems.
• When the error is not resolved after
connecting the tracking cable to the
connectors of the CPU modules of
the two systems and resetting the
error, the tracking cable or CPU
module side tracking hardware is
faulty.
(Contact your local Mitsubishi
representative, explaining a detailed
description of the problem.)
• Power the corresponding CPU
module OFF and then ON again, or
reset it and then unreset. If the same
error still occurs, this indicates the
CPU module 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.
MELSEC-Q
Corresponding
CPU
QnPRH
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