Self-Diagnostics Test - Mitsubishi Electric MELSEC iQ-R Series User Manual

Self-diagnostics test

Self-diagnostics test can check the hardware status of the RJ71LP21-25.
The RJ71LP21-25 alone can perform the following three types of tests.
Test item Description
Self-loopback Test For this test, the RJ71LP21-25 alone checks the hardware including the send/receive clines and cables of the transmission
system.
Internal Self-loopback Test For this test, the RJ71LP21-25 alone checks the hardware including the send/receive lines of the transmission system.
Hardware test Check the hardware in the RJ71LP21-25.
Self-loopback test
Operating procedure
1.
Connect the IN connector and OUT connector of the RJ71LP21-25 with optical fiber cables.
2.
Set the module operation mode to "Self-loopback Test".
[Navigation window]  [Parameter]  [Module Information]  RJ71LP21-25  [Application Settings]  [Module
Operation Mode]
3.
Click the [Apply] button.
4.
Write the module parameters and reset the CPU module.
Do not connect/disconnect the optical fiber cable during the test. Connecting/disconnecting the cable causes completion with
an error.
■Checking the status and result of self-loopback test.
The status and result of self-loopback test can be checked with the LED indicator of the module.
Test status LED indication
Test in progress The RUN LED is turned on, the ERR LED is turned off, and the T PASS LED flashes. The SD/RD LED is turned on.
The dot matrix LED indicates "MD7".
Completed successfully Since the test is repeated during normal operation, the test is judged to have been completed successfully when the T PASS LED
flashes 20 times (for about 10 seconds) or more.
Completed with an error The ERR LED flashes and the dot matrix LED indicates "ER7" and error number alternately at intervals of one second.
4 TROUBLESHOOTING
4.2 Checking the Module Status
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