Mitsubishi Electronics FX5 User Manual

[STARTUP AND MAINTENANCE PRECAUTIONS]

[PRECAUTIONS IN OPERATION]

● Do not touch any terminal while the PLC's power is on. Doing so may cause electric shock or 

malfunctions.

● Before modifying the program in mid-operation, forcing output, running or stopping the PLC, read this 

manual and the associated manuals carefully and ensure complete safety. An operation error may 
damage the machinery or cause accidents.

● Do not change the program in the PLC from two or more peripheral equipment devices (such as an 

engineering tool and a GOT) at the same time. Doing so may cause destruction or malfunction of the 
PLC program.

● Use the battery for memory backup in conformance to the FX5 User's Manual (Hardware).

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Use the battery for the specified purpose only.

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Connect the battery correctly.

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Do not charge, disassemble, heat, put in fire, short-circuit, connect reversely, weld, swallow or 
burn the battery, or apply excessive force (vibration, impact, drop, etc.) to the battery.

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Do not store or use the battery at high temperatures or expose to direct sunlight.

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Do not expose to water, bring near fire or touch liquid leakage or other contents directly.

Incorrect handling of the battery may cause excessive heat, bursting, ignition, liquid leakage or 
deformation, and lead to injury, fire or failures and malfunction of facilities and other equipment.

● Construct an interlock circuit in the program to ensure safe operation for the whole system when 

executing control (for data change) of the PLC in operation. Read the manual thoroughly and ensure 
complete safety before executing other controls (for program change, parameter change, forced 
output and operation status change) to the PLC in operation. Otherwise, the machine may be 
damaged and accidents may occur by erroneous operations.