Test Operation, Adjustment, Maintenance And Troubleshooting - Mitsubishi FX3UC SERIES User Manual

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
12. Test Operation, Adjustment, Maintenance and
Troubleshooting
STARTUP AND MAINTENANCE
PRECAUTIONS
• Do not touch any terminal while the PLC's power is on.
Doing so may cause electric shock or malfunctions.
• Before cleaning or retightening terminals cut off all phases of the power supply externally.
Failure to do so may cause electric shock.
• Make sure to connect the battery for memory backup correctly.
Do not charge, disassemble, heat, short-circuit, or expose the battery to fire.
Doing so may rupture or ignite it.
• Before modifying or disrupting the program in operation or running the PLC, carefully read through this manual
and the associated manuals and ensure the safety of the operation.
An operation error may damage the machinery or cause accidents.
STARTUP AND MAINTENANCE
PRECAUTIONS
• Turn off the power to the PLC before attaching or detaching the memory cassette. If the memory cassette is
attached or detached while the PLC's power is on, the data in the memory may be destroyed, or the memory
cassette may be damaged.
• Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric distributor.
• Turn off the power to the PLC before connecting or disconnecting any extension cable.
Failure to do so may cause equipment failures or malfunctions.
• Turn off the power to the PLC before attaching or detaching the following devices.
Failure to do so may cause equipment failures or malfunctions.
- Peripheral devices, display module, expansion boards and special adapters
- Extension blocks, FX Series terminal blocks, Connector conversion adapter and extension power supply unit
- Battery and memory cassette
DISPOSAL PRECAUTIONS
• Please contact a certified electronic waste disposal company for the environmentally safe recycling and disposal
of your device.
TRANSPORTATION
PRECAUTIONS
• Before transporting the PLC, turn on the power to the PLC to check that the BAT LED is off.
If the PLC is transported with the BAT LED on or the battery exhausted, the battery-backed data may be unstable
during transportation.
• The PLC is a precision instrument. During transportation, avoid impacts larger than those specified in Section 3.1.
Failure to do so may cause failures in the PLC.
After transportation, verify the operations of the PLC.

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