Mitsubishi MELSEC Q Series User Manual page 409

13 TROUBLESHOOTING
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(3) Loop test
Checks the operating status of the connected remote stations, local stations,
intelligent device stations and standby master station.
Normal stations are displayed "blue", abnormal stations "red", reserved stations
"green", error invalid stations "yellow", and unused stations "gray".
(a) Operating procedure
[Diagnostics]
1) Select "CC-Link" for "Module Setting".
2) Specify the target master module of loop test for "Module No." or "I/O
Address".
3) Click the Start Monitoring button.
4) Click the Loop Test button.
5) When checking the communication status of all stations
Select "All stations" for "Target station", and click the Execute Test
button.
6) When checking the communication status of specific modules
Select "Selected station No." for "Target station", specify the station
number, and click the Execute Test button.
POINT
When conducting a loop test, do not perform write to buffer memory addresses
5E0 , 608 .
H H
[CC-Link / CC-Link/LT diagnostics]
MELSEC-Q
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