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GX WORKS3 • FX5U / GX WORKS3

How do I connect GX Works3 directly to an FX5U by Ethernet?

Connect the PC to the CPU Ethernet port, open Online → Current Connection Destination, select Ethernet direct connection and run Communication Test.

Practical explanation

GX Works3 can select the PC network adapter used for a direct connection.

A direct connection is different from a hub connection using a configured PLC IP address.

Check in this order

  1. 1Select the correct PC Ethernet adapter.
  2. 2Disable or account for another active adapter only if routing is confusing the connection.
  3. 3Run Communication Test before reading or writing.

Last reviewed: 2 October 2026

Official source: FX5S/FX5UJ/FX5U/FX5UC User's Manual (Hardware)

Related verified answers

How do I connect GX Works3 to an FX5U through a network switch?Should I read the PLC program before making an FX5U change?Why did my FX5U Ethernet parameter change not take effect?

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