FX3U-ENET User's manual

SAFETY PRECAUTIONS (Read these precautions before use.) Before installation, operation, maintenance or inspection of this product, thoroughly read through and understand this manual and all of the associated manuals. Also, take care to handle the module properly and safely. This manual classifies the safety precautions into two categories: "WARNING" and "CAUTION." Indicates that incorrect handling may cause hazardous conditions, resulting in death or severe injury. WARNING Indicates that incorrect handling may cause hazardous conditions, resulting in medium or slight personal injury or physical damage.

CAUTION Depending on the circumstances, procedures indicated by CAUTION may also cause severe injury. It is important to follow all precautions for personal safety. Store this manual in a safe place so that it can be taken out and read whenever necessary. Always forward it to the end user. [Design Precautions] WARNING To prevent malfunctions of the PLC system that may be caused by illegal e-mail, take proper countermeasures (such as virus detection) so that illegal e-mail is not received by the mail server of this module.

If it is necessary to ensure the security of the PLC system against unauthorized access from external devices via the Internet, appropriate measures must be incorporated by the user. When controlling the PLC (modifying data) while it is in operation by connecting computer peripheral devices to the main unit or connecting personal computers to the extension device, make sure to have an interlock circuit outside of the PLC to ensure safe system operation. Do not write any data in the "system area" of the buffer memory of the extension device. When writing a value to the buffer memory including "System Area," pay close attention not to change the system bit.

If data is written to the "system area" or the "use prohibited" signal is output, there is a risk that the PLC system may malfunction. When the program examples introduced in this manual are applied to the actual system, examine the safety of the control in the target system. A - 1 A - 1

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[Design Precautions] CAUTION When the status control (remote RUN/STOP) of the PLC is performed from the external device, select the "Always wait for OPEN" parameter set by an user in advance. (Select with the initial timing setting (BFM#24 b8) in the operational setting.) When "Do not wait for OPEN" is selected, the communication line at remote STOP is closed. The communication line cannot be reopened on the PLC side after that, and the remote RUN from the external device cannot start.

[Security Precautions] WARNING 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] CAUTION Use the product within the generic environment specifications described in chapter 3 of this manual.

Never use the product in areas with excessive dust, oily smoke, conductive dusts, corrosive gas (salt air, Cl 2 , H 2 S, SO 2 or NO 2 ), flammable gas, vibration or impacts, or exposed to high temperature, condensation, or rain and wind. If the product is used in such conditions, electric shock, fire, malfunctions, deterioration or damage may occur. When drilling screw holes or wiring, make sure cutting or wire debris does not enter the ventilation slits. Failure to do so may cause fire, equipment failures or malfunctions. Be sure to remove the dust proof sheet from the PLC's ventilation port when installation work is completed.

Failure to do so may cause fire, equipment failures or malfunctions. Connect the extension cables securely to their designated connectors. Unsecured connection may cause malfunctions. A - 2 A - 2

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[Wiring Instructions] WARNING Before mounting or wiring the module, make sure to shut off all of the external power supply. Failure to do so may cause electric shocks or damage the module. When turning on the power and operating after mounting or wiring the module, make sure to install the accessory terminal covers to the product. Otherwise, it may cause electric shocks. CAUTION Make sure to place the communication cables and the power cables in a duct or fasten them using a clamp. If the cables are not placed in a duct or fastened with a clamp, their positions can be unstable, moved and pulled inadvertently.

This may damage the module and the cables, or cause the module malfunction due to unsecured cable connections. When disconnecting the communication cables and the power cables, do not pull the cables. When disconnecting a cable with a connector, hold the connector to the module by hand and pull it out to remove the cable. When disconnecting a cable connected to a terminal block, loosen the screws on the terminal block before removing the cable. If a cable is pulled while being connected, it may cause the module malfunction or damage the module and the cable. Do not bundle the control line and the communication cables together with or lay it close to the main circuit or power line.

As a guideline, lay the control line and the communication cables at least 100mm (3.94") or more away from the main circuit or power line. Noise may cause malfunctions. Before connecting twisted pair cables, the ground pin brush grounded via a resistor enables discharging static electricity on the cables effectively. This can prevent the electrostatic discharge to the product. A - 3 A - 3

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[Setup and Maintenance Precautions] WARNING Do not touch any terminal while the PLC's power is on. Doing so may cause electric shock or malfunctions. Before cleaning or retightening terminal screws and module mounting screws, externally cut off all phases of the power supply. Failure to do so may cause electric shock, fire, malfunctions and product damage. Before modifying or disrupting the program, forcible output, RUN and STOP while they are in operation, 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. CAUTION Do not disassemble or modify the PLC.

Doing so may cause fire, equipment failures, or malfunctions. For repair, contact your local Mitsubishi Electric distributor. Cut off all phases of the power supply externally before installation or wiring work in order to avoid damage to the product or electric shock. [Precautions When Disposing of This Product] CAUTION Dispose of this product as an industrial waste. [Trans Portation Precautions] CAUTION The PLC is a precision instrument. During transportation, avoid impacts larger than those specified in the general specifications of the PLC main unit manual. Failure to do so may cause failures in the PLC. After taransportation, verify the operations of the PLC.

Other company and product names herein are either trademarks or registered trademarks of their respective owners. Microsoft , Windows 2000, Outlook , Visual C++ and Visual Basic are either registered trademarks or trade- marks of Microsoft Corporation in the United States and/or other countries. Ethernet is a trademark of Xerox Corporation. This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual. A - 4 A - 4

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