Mitsubishi Electric MELSECQ Series User Manual page 115

8
TROUBLESHOOTING
Display contents
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The LED display changes according to the operation status of the QD63P6 as follows.
Display point
•RUN LED is OFF.
•RUN LED is ON.
•ERR. LED is OFF.
ERR. LED is ON.
• A_CH1 LED is ON.
(LED corresponding
to the CH turns ON.)
• B_CH1 LED is ON.
(LED corresponding
to the CH turns ON.)
Symbols in the Display contents columns indicate the following status:
: OFF, : ON
8.1.1 Checking error description using System Monitor of GX Developer
search engine
Table 8.3 LED display
Operation status
Hardware fault
The module is
normal.
Error
Phase A pulse is
being input.
Phase B pulse is
being input.
8.1 Error Processing and Recovery Methods
Action
If the RUN LED does not turn ON after
the programmable controller is powered
ON, the module is a failure. Replace it.
-
Check the error code (refer to Section
8.5) and fix the error cause.
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