Mitsubishi Electric MELSEC Q Series User Manual page 85

(e) If the 7-segment LED shows other than "00"
The "ERR." LED starts flashing once the error is detected during diagnostics or setting.
A value corresponding to the diagnostics for which the error occurred is displayed on the 7-segment LED.
If the 7-segment LED is off and only "ERR." LED flashes, a system error is present.
7-segment LED
Mode
display
E1
1 E2
E3
E4
2 E5
E6
3 E7
4 E8
5 E9
6 EA
*1 : An error may occur if a CompactFlash card is not inserted.
*2 : An error may occur if a distribution cable is not connected correctly.
Correctly connect and distribute the cable again, and then reexecute the self-diagnostic test for Mode 4.
Upon detection of the failure, the diagnostics and setting will be terminated.
Retry the diagnostics and setting if they failed.
If failure is detected again, the hardware of the Q12DCCPU-V may be faulty.
Please consult your local Mitsubishi service center or representative, explaining the details of the problem.
(f) Execution of the 7-segment LED test (mode 7)
Perform the following operations to execute the test.
Visually check there is no inactive dot in the 7-segment LED.
If there is any inactive LED, the hardware of the Q12DCCPU-V may be faulty.
Please consult your local Mitsubishi service center or representative, explaining the details of the problem.
Error diagnostics
ROM diagnostic test
Work RAM diagnostic test
Battery backup RAM diagnostic test
Ethernet diagnostic test (CH1)
Ethernet diagnostic test (CH2)
During Ethernet loopback test
CompactFlash card interface diagnostic test
*2
RS-232 diagnostic test
USB diagnostic test
Bus diagnostic test
1.
Move the RUN/STOP/MODE switch to the RUN position.
2.
Move the RESET/SELECT switch to the SELECT position.
The mode shifts as pull the switch to SELECT side, each
segment of 7 segment LED turns ON/OFF in order.
Check the display status by visually.
3.
Power OFF.
CHAPTER 6 HARDWARE OPERATIONS
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