ANCE
PRECAUTIONS

• 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
• Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
* For repair, contact your local Mitsubishi Electric distributor.
• Since the FX-USB-AW case is made of resin, do not drop it or exert strong
impact to it.
Doing so may cause damage.
DISPOSAL
PRECAUTIONS
• Please contact a certified electronic waste disposal company for the
environmentally safe recycling and disposal of your device.
TRANSPORT AND
STORAGE PRECAUTIONS
• The product is a precision instrument. During transportation, avoid any
impacts.
Failure to do so may cause failures in the product.
After transportation, verify the operations of the product.
Add check mark
9. Troubleshooting
9.1 FX-USB-AW
• If communication cannot be established between the PLC (as well as a positioning
unit or a programmable cam switch) and a PC using FX-USB-AW, confirm the
following status by checking POWER LED, SD LED, and RD LED in FX-USB-AW.
• When driver installation is required after already establishing USB communication.
→ This product requires USB Driver Installation for each USB port to be connected.
Connect the product to a driver-installed USB port, or install the driver to the
current port.
9.2 FX 3U-USB-BD
• If communication cannot be established between the PLC and a personal computer
using FX 3U-USB-BD, confirm the following status by checking SD LED and RD LED
in FX 3U-USB-BD.
The status of SD LED and RD RED
• When driver installation is required after already establishing USB communication.
→ This product requires USB Driver Installation for each USB port to be connected.
Connect the product to a driver-installed USB port, or install the driver to the
current port.
State of POWER LED Contents
POWER LED is lit.
The DC5V power supply from the personal computer is
normally supplied. In case of no communication, check
the status of SD LED and RD LED.
POWER LED is not lit.
The DC 5V power supply from the personal computer is
not supplied. Check the items below.
• Confirm that the specified cable is used to connect
the FX-USB-AW and the personal computer.
• Confirm whether the power supply is supplied to
personal computer.
The status of SD
LED and RD LED.
Contents
SD
Blinking Communicating correctly
Extinguished
• Confirm that the power is supplied to the personal
computer.
• Confirm the personal computer and the PLC are
connected properly with the specified cable.
• Confirm that the communication settings and
connected PLC are correctly set in the software.
Refer to the software manual.
RD
Blinking Data receiving
Extinguished
• Confirm that the power is supplied to PLC.
• The PLC will not operate when a configuration that
exceeds the DC 5V or DC 24V capacity is used.
It will also be impossible to communicate normally.
• Confirm that the specified cable is used to connect the
personal computer and PLC.
• Confirm that the communication settings and connected
PLC are correctly set in the software.
Refer to the software manual.
The status of SD
LED and RD LED.
Contents
SD
Blinking Communicating correctly
Extinguished
• Confirm that the power is su
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