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GX WORKS3 • FX5U / GX WORKS3

How do I connect GX Works3 to an FX5U through a network switch?

Configure the FX5U Ethernet-port own-node settings, place the PC in the same IP subnet, and select connection via hub using the CPU IP address.

Practical explanation

The PLC parameter path is Navigation → Parameter → CPU model → Module Parameter → Ethernet Port → Basic Settings → Own Node Settings.

Ethernet parameters normally need to be written to the CPU and activated as described by the manual.

Check in this order

  1. 1Check for duplicate IP addresses.
  2. 2Confirm PC subnet mask and PLC subnet.
  3. 3Ping is helpful, but GX Works3 Communication Test is the final engineering check.

Last reviewed: 2 October 2026

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

Related verified answers

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