Mitsubishi Electric Q Series Reference Manual page 124

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION
Switch position
Display section
Switch position
Display section
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(3) Checking the test result
The T.PASS LED of the network module flashes at approximately 0.5 s intervals.
When the T. PASS LED flashes 20 times or more and if the ERR.LED does not
flash, this condition indicates normal completion.
When the test has failed, the ERR. LED flashes.
Check the test result with the LEDs of the testing station.
[Normal test result]
Before test
(during RESET)
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
[Abnormal test result]
Before test
(during RESET)
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
Upon detection of an error, the test will be terminated (abnormal termination).
<Possible causes of errors>
A loopback was executed because of a wiring error, a faulty optical fiber cable or
abnormality was detected in other station.
1) If wiring is incorrect
Check the connections of IN and OUT connectors and other connectors.
If an incorrect connection is found, connect properly.
2) If an optical fiber cable is faulty or other station is abnormal
Replace the defective cable or module.
During test
(during STOP)
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
During test
(during STOP)
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
Or L. ERR.
MELSEC-Q
Test complete
Complete when
T.PASS flashed 20 times
(approx. 10 seconds) or more.
Test complete
Flashing of the testing
station's ERR. Indicates
an error.
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