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MELSEC-Q
4 SETTING AND PROCEDURE BEFORE 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. 10s) 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]
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 ERR.
LED of the executing
station indicates an error.
Or L. ERR.
RUN
T.PASS
SD
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 another station is abnormal
Replace the defective cable or module.
REMARKS
The status during the test and the test result can be checked using link special
registers or GX Developer.
Baton pass status (host) SW0047
1FH : Offline test
Cause of baton pass interruption SW0048
2H : Offline test
Offline test execution item/
faulty station (requesting side)
SW00AC
03H
or
04H
: Loop test
Offline test result (requesting
side)
SW00AD
0 : Normal
1 or larger : Error code
For details on how to check the error contents, refer to Chapter 8.
If two or more modules are installed, the testing status and the result of each module
can be checked by adding 200
H to the corresponding device number.