PLCFX5UVerification pending — cross-check with the official manual
FX5U 3121H — Program error
Warning — monitor
CAUSE
Why does it occur?
• The number of devices used in the dedicated instruction specified in the program is incorrect.
REMEDY · Step by step
How to fix it?
Stop
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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