Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 4

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Table of Contents

[DESIGN PRECAUTIONS]

● When an inductive load such as a lamp, heater, or solenoid valve is controlled, a large current

(approximately ten times greater than normal) may flow when the output is turned from off to on. Take

proper measures so that the flowing current does not exceed the value corresponding to the

maximum load specification of the resistance load.

● After the CPU module is powered on or is reset, the time taken to enter the RUN status varies

depending on the system configuration, parameter settings, and/or program size. Design circuits so

that the entire system will always operate safely, regardless of this variation in time.

● Simultaneously turn on and off the power supplies of the CPU module and extension modules.

● If a long-time power failure or an abnormal voltage drop occurs, the PLC stops, and output is turned

off. When the power supply is restored, it will automatically restart (when the RUN/STOP/RESET

switch is on the RUN side).

[SECURITY PRECAUTIONS]

● To maintain the security (confidentiality, integrity, and availability) of the programmable controller and

the system against unauthorized access, denial-of-service (DoS) attacks, computer viruses, and other

cyberattacks from unreliable networks and devices via network, take appropriate measures such as

firewalls, virtual private networks (VPNs), and antivirus solutions.

[INSTALLATION PRECAUTIONS]

● Make sure to cut off all phases of the power supply externally before attempting installation or wiring

work. Failure to do so may cause electric shock or damage to the product.

● Use the product within the generic environment specifications described in the MELSEC iQ-F FX5S/

FX5UJ/FX5U/FX5UC User's Manual (Hardware).

Never use the product in areas with excessive dust, oily smoke, conductive dusts, corrosive gas (salt

condensation, or rain and wind.

If the product is used in such conditions, electric shock, fire, malfunctions, deterioration or damage

), flammable gas, vibration or impacts, or expose it to high temperature,

Troubleshooting