PLCFX5UVerification pending — cross-check with the official manual
FX5U 4C20H — CPU module backup/restoration function error
Warning — monitor
CAUSE
Why does it occur?
• The data backup/restoration function was executed while the CPU module is in a state where this function cannot be executed.
REMEDY · Step by step
How to fix it?
• Check that the CPU module's serial No. is compatible with the backup function (16Y**** or later). • Initialize the CPU built-in memory, and execute the data restoration function again.
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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