How To Check Errors Using Led Displays; Checking Error Display - Mitsubishi Electric FX3U-ENET User Manual

11 TROUBLESHOOTING

11.1 How to Check Errors Using LED Displays

11

11.1.1 Checking error display

LED name
1 RUN
2 INIT.
3 100M
4 ERR.
5 COM.ERR.
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This section describes the errors that can be checked with the LED displays on the
front of the Ethernet module.
The following can be checked with the LED displays on the front of the Ethernet
module.
<Ethernet module LED>
Status to check
1) Watchdog timer error
Turns off after powering on
• A watchdog timer (approximately 600 ms) error is detected by the self diagnosis
the Ethernet module.
2) Base module power is OFF, or the extension cable is not connected.
1) Failed to re-initialization due to a parameter error
• Check/correct the parameter setting values for the Ethernet modules using a sequence
Off
2) Base module power is OFF, or the extension cable is not connected.
1) Using 10Mbps HUB
• Initial processing.
• Replace with 100Mbps HUB.
Does not turn on
2) Does not turn on using 100Mbps HUB
• Check the connection of the connectors on the Ethernet side and the HUB side.
• Replace the cable.
1) Module parameter setting error
• Check/correct the parameter setting values for the Ethernet modules using the
Turns on after powering on 2) PLC error
the Ethernet module. • When the PLC [RUN] LED is off/flashing, or the [ERR.] LED is on, check the content of
3) Ethernet module error (H/W error)
4) Base module power is OFF, or the extension cable is not connected.
1) Check the contents of the error using the error codes stored by the error detection of the
following processing and remove the causes.
• Initial processing
Turns on after powering on
• Fixed buffer send processing
the Ethernet module.
• E-mail send/receive processing
Or turns on temporarily • Open processing
• MC protocol communication processing
• Other processing (processing for which error codes are stored in the error log area)
2) For a list of error codes, see Section 11.4.
Cause/corrective action
function of the Ethernet module.
program or the FX Configurator-EN and re-download.
sequence program or the FX Configurator-EN and re-download.
the error occurring in the PLC and correct the problem.
MELSEC-F
(Continues on the following page)
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