4 - 39 4 - 39
MELSEC-Q
4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION
(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 (approx. 10 seconds) 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]
[Abnormal test result]
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.
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
MNG
D.LINK
RD
L ERR.
Switch position
Display section
Before test
(during RESET)
During test
(during STOP)
Test complete
Complete when
T.PASS flashed 20 times
(approx. 10 seconds) or more.
RUN
T.PASS
SD
ERR.
RUN MNG
T.PASS D.LINK
SD RD
ERR. L ERR.
MNG
D.LINK
RD
L ERR.
Switch position
Display section
Before test
(during RESET)
During test
(during STOP)
Test complete
Flashing of the testing
station's ERR. Indicates
an error.
Or L. ERR.
RUN
T.PASS
SD
ERR.
To Next Page
Loading...
