Chapter9 Troubleshooting - Mitsubishi Electric Melsec Q Series User Manual

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TROUBLESHOOTING

CHAPTER9 TROUBLESHOOTING

This chapter explains the troubleshooting and error codes of the QJ71PB92V.
Before troubleshooting the QJ71PB92V, check that no errors have occurred on the QCPU
or MELSECNET/H remote I/O network.
If any error is identified, check the error details and take corrective actions.
For the troubleshooting in Section 9.1 to 9.4, refer to the following flowchart.
Troubleshooting
Do the LEDs indicate an
error status?
RUN LED
RSP ERR. LED : ON
TOKEN LED
PRM SET LED : Flashing
FAULT LED
No
Unable to write the
parameters from
GX Configurator-DP?
No
Unable to communicate with DP-Slaves?
No
Is the QJ71PB92V mounted
to the single CPU system?
No
For the QJ71PB92Vs used in the
redundant system, has the
following error occurred?
Output data turn OFF or
momentarily OFF in system
switching.
FAULT LED of QJ71PB92V in
new standby system is ON.
No
When the QJ71PB92V is used in the
redundant system, is maintenance
to be performed on the one in the
standby system?
No
Completed
: OFF
Yes
: OFF
: ON
Yes
Yes
Yes
Yes
Yes
Figure 9.1 Troubleshooting Flowchart
Check the error indicated by LEDs and take corrective
Section 9.1
actions. ( )
Takes actions for the case where parameters cannot be
written from GX Configurator-DP. (
Troubleshooting when communication with DP-Slaves is
Section 9.3
not possible. (
When output data turn OFF or momentarily OFF in system
Section 9.4.1 and 9.4.2
switching. (
Perform maintenance of the QJ71PB92V in the standby
Section 9.4.3
system. ( )
Section 9.2
)
)
)
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