Mitsubishi Melsec-Q Series User Manual page 315

12.2.15 When the USER LED has turned on
If the USER LED turned on, follow the procedure described below.
The USER LED turns on when an error is detected by the CHK instruction or the annunciator (F) turns on.
If the USER LED is on, monitor the special relays SM62 and SM80 in the monitor mode of GX Developer.
• When M62 has turned on
The annunciator (F) is on.Check the error cause using SD62 to SD79.
• When SM80 has turned on
The USER LED turns on by the execution of the CHK instruction. Check the error cause using SD80.
Eliminate the error cause after checking.
The USER LED can be turned off by:
• Resetting with the RESET/L.CLR switch or
• Executing the LEDR instruction in the sequence program.
When the RESET/L. CLR switch is tilted to L.CLR several times for latch clear operation, the USER LED flickers to indicate
that the latch clear processing is in process.
When the RESET/L. CLR switch is further tilted to L.CLR while the USER LED flickering, the USER LED turns off and
terminates the latch clear processing.
12.2.16 When the BAT. LED has turned on or is flickering
When the BAT. LED has turned on or is flickering, follow the procedure described below.
The BAT. LED turns on or flickers when a low battery capacity is detected.
If the BAT. LED is on, monitor the special relays and special registers in the monitor mode of GX Developer to check
which of the CPU module and SRAM card batteries was lowered in capacity. (SM51 to SM52, SD51 to
After checking, replace the battery with a new one, and reset the CPU module with the RESET/L.CLR switch
or run the LEDR instruction, and the BAT. LED will turn off.
Note12.9
Note1
Note12.9
Universal
For the Universal model QCPU, use the RUN/STOP/RESET switch for operation.
CHAPTER12 TROUBLESHOOTING
SD52)Note1
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