Flowchart To Use When Run Led Is Unlit - Mitsubishi Electric SW0DNC-MNETH-B User Manual

14 TROUBLESHOOTING

14.4.1 Flowchart to use when RUN LED is unlit

An error occurs.
Did the LED turn
off even when communication
with other station was being
performed?
YES
Is communication with
other station continued?
YES
Replace the MELSECNET/H board
since the MELSECNET/H board's
"RUN" LED is broken.
1: WDT error logs can be checked on the event viewer. (Refer to 14.3.2)
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NO (The "RUN" LED has been off since the power was turned on.)
LED turn on after replacing the
NO (The "RUN" LED turned off
while communicating)
Is there
a WDT (288) error log
1
remaining?
NO
Did the "RUN"
MELSECNET/H
board?
NO
Check PC hardware, etc.
MELSEC
YES
Lengthen the driver WDT monitoring time
(Refer to Section 14.7.)
YES
Complete
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