> For the complete documentation index, see [llms.txt](https://docs.aitheon.com/industrial-automation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aitheon.com/industrial-automation/type-of-device-plc/mitsubishi-electric-fx5u-plc-modbus-tcp-configuration.md). # Mitsubishi Electric FX5U PLC Modbus TCP Configuration ## **Instruction for configuration Mitsubishi Electric FX5U PLC as Modbus/TCP Server (Slave)** 1\. Create a new project for FX5U. ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPh_7AST0pzwSYJstTc%2F-MPh_dq4cKrLwPpi8yAr%2Fimage.png?alt=media\&token=07c9feed-57b5-4063-abd1-54b300eda490) 2\. On the left side project tree open *Parameter -> FX5UCPU -> Module Parameter -> Ethernet Port*. ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPh_7AST0pzwSYJstTc%2F-MPh_h4q2VdFk7XEoXPq%2Fimage.png?alt=media\&token=591e41dc-3962-4de6-80da-bc62c3164c22) 3\. Add the **IP address** of FX5U and **Subnet mask**. (Note that the **IP address** of PLC needs to have the same number of the subnet as your PC or another device which are connected to PLC). Press **\** on **External Device Configuration.** ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPhsRiQFKdNfuqZXAlZ%2F-MPhxKipiJjDyNEYKKGr%2Fdetailed.png?alt=media\&token=6495d250-f516-4ff3-8c91-ca0da80eeb50) 4\. Drag **Modbus/TCP Connection** to the blue line near the picture of PLC. And press **Close with Reflecting the Setting**. ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPhsRiQFKdNfuqZXAlZ%2F-MPhyumMW13abDz-EzUY%2Farrow.png?alt=media\&token=c4ad7901-1c52-458c-bcb4-597ed7c4770f) The result will be: ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPh_7AST0pzwSYJstTc%2F-MPh_s9tcNZYAntQycdZ%2Fimage.png?alt=media\&token=c16f9e76-4d4a-46e3-aeb7-842e2f7d4dba) 5\. To see a relation between Modbus Device № and Device inside FX5U press - **\** on **Modbus/TCP Setting** - **Device Assignment**. ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPhsRiQFKdNfuqZXAlZ%2F-MPi-5uhXgyLxTuHB23i%2Fdetailed.png?alt=media\&token=4d826614-7413-4cf3-98bb-87cd6a76f3ea) The next window will get opened: ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPh_7AST0pzwSYJstTc%2F-MPh_utUqoC5S7xbrNw7%2Fimage.png?alt=media\&token=84b988c5-85ea-4d4e-9a02-465e4ecb89a6) 6\. Press **Check** and then **Ok** if **No error found**. ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPhsRiQFKdNfuqZXAlZ%2F-MPi-wFH6dBu6VTK6kXm%2Fcheck.png?alt=media\&token=92629409-8095-4339-a677-00ee3adf3714) 7\. Press **Apply** to save the settings. ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPhsRiQFKdNfuqZXAlZ%2F-MPi0GTEl6QMggYjAjPo%2Fapply.png?alt=media\&token=0eca037a-3273-4685-b2a0-b3dcaebc8cc2) 8\. Press **Rebuild All** on the tools palette. ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPhsRiQFKdNfuqZXAlZ%2F-MPi0oom1iZxR_Gy_5a6%2Frebuild.png?alt=media\&token=d262a798-b3ae-48b1-bb4e-09f47f35fed6) 9\. And download the program to PLC. Restart CPU. The connection will be established automatically: ![](https://2932290758-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MPhYZyRjl1LMzh5UVLj%2F-MPh_7AST0pzwSYJstTc%2F-MPhbFlSJ5qdGYx3A7VC%2Fimage.png?alt=media\&token=66918cb7-cd1a-4d7c-ae9d-5be87fff29da)