Table of Contents
14 TROUBLESHOOTING
14.4.3 Flowchart to use when L.ERR. LED turns on
An error occurs.
Has the MNETH utility standard?
Stop the user program and activate
the MNETH utility.
Select "Board Information" screen and
identify the error type from LED status.
Is the error type "PRM.E"?
Select "Loop monitor" screen.
Is forward loop normal?
Check the cable for the host forward loop.
Did the data link begin?
Complete
1: For the error code in SW0055, refer to the "Q Corresponding MELSECNET/H Network System Reference
Manual (PLC to PLC network)".
The error code in SW0085 can be also checked by monitoring SD85 with Device Monitor Utility.
(Refer to "MELSEC Data Link Library Reference Manual".)
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YES
NO
YES
NO
NO
YES
NO
YES
Check for the following error causes:
(1)
Duplication of station No. for MELSECNET/H board.
(2)
Coexistence of any different network types within the same network.
(3)
In the case of MELSECNET/H Extended mode, use of the
MELSECNET/H board of ROM version 2X or later.
(For checking the ROM version, refer to Appendix 5)
(4)
Error code stored in SW0055.
Remove the error cause(s).
Check the cable for the host reverse loop.
Consult with dealer regarding the problem.
MELSEC
1
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Troubleshooting
