PLCFX5UVerified · sol.ls-electric.com
FX5U 1080H — ROM write count error
Trip — immediate stop
CAUSE
Why does it occur?
The allowable number of ROM writes was exceeded.
REMEDY · Step by step
How to fix it?
Replace the ROM or check the number of writes.
Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).
SOURCE
Related manual page
Summary based on the official Mitsubishi Electric manual. For accurate and complete information, always consult the official manual.
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