PLCFX5UVerified · sol.ls-electric.com
FX5U C400 — MODBUS slave timeout
Alarm — operational, inspection needed· AUTO-RESET
CAUSE
Why does it occur?
No response from RS-485 Modbus
REMEDY · Step by step
How to fix it?
Verify wiring, termination resistor, baud rate, and station number match
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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