# How can NODE-RED communicate with Mitsubishi FX3U? The communication uses Mitsubishi's programming port, but I couldn't find a usable node in NODE-RED. Has anyone done this before?

**URL:** <https://discourse.nodered.org/t/how-can-node-red-communicate-with-mitsubishi-fx3u-the-communication-uses-mitsubishis-programming-port-but-i-couldnt-find-a-usable-node-in-node-red-has-anyone-done-this-before/100296>\
**Category:** Industrial\
**Created:** [3 February 2026 00:03 UTC](https://discourse.nodered.org/t/how-can-node-red-communicate-with-mitsubishi-fx3u-the-communication-uses-mitsubishis-programming-port-but-i-couldnt-find-a-usable-node-in-node-red-has-anyone-done-this-before/100296 "2026-02-03T00:03:53Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![chuzehao](https://avatars.discourse-cdn.com/v4/letter/c/47e85d/32.png) [@chuzehao](https://discourse.nodered.org/u/chuzehao)\
**Post date:** [3 February 2026 00:03 UTC](https://discourse.nodered.org/t/how-can-node-red-communicate-with-mitsubishi-fx3u-the-communication-uses-mitsubishis-programming-port-but-i-couldnt-find-a-usable-node-in-node-red-has-anyone-done-this-before/100296/1 "2026-02-03T00:03:53Z")

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Collect PLC data through the Mitsubishi programming port, but I couldn't find any usable nodes online.

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**Author:** ![Aaqu](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/aaqu/32/101407_2.png) [@Aaqu](https://discourse.nodered.org/u/Aaqu)\
**Post date:** [3 February 2026 06:42 UTC](https://discourse.nodered.org/t/how-can-node-red-communicate-with-mitsubishi-fx3u-the-communication-uses-mitsubishis-programming-port-but-i-couldnt-find-a-usable-node-in-node-red-has-anyone-done-this-before/100296/2 "2026-02-03T06:42:31Z")

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you try modbus? use node-red as a master [How to Configure FX3U PLC as a Modbus Slave and how to read write the data from PLC through Modbus](https://www.youtube.com/watch?v=cPuX4ga1Ods)

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**Author:** ![chuzehao](https://avatars.discourse-cdn.com/v4/letter/c/47e85d/32.png) [@chuzehao](https://discourse.nodered.org/u/chuzehao)\
**Post date:** [10 February 2026 06:38 UTC](https://discourse.nodered.org/t/how-can-node-red-communicate-with-mitsubishi-fx3u-the-communication-uses-mitsubishis-programming-port-but-i-couldnt-find-a-usable-node-in-node-red-has-anyone-done-this-before/100296/3 "2026-02-10T06:38:08Z")

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I tried the Mitsubishi FX programming port protocol. However, due to the large amount of discontinuous data that needed to be read, I attempted polling reading, which resulted in a delay of several seconds.

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**Author:** ![chuzehao](https://avatars.discourse-cdn.com/v4/letter/c/47e85d/32.png) [@chuzehao](https://discourse.nodered.org/u/chuzehao)\
**Post date:** [10 February 2026 06:40 UTC](https://discourse.nodered.org/t/how-can-node-red-communicate-with-mitsubishi-fx3u-the-communication-uses-mitsubishis-programming-port-but-i-couldnt-find-a-usable-node-in-node-red-has-anyone-done-this-before/100296/4 "2026-02-10T06:40:57Z")

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I bought a small device that can convert the Mitsubishi FX protocol to Modbus TCP protocol without programming, allowing direct data reading. I am now using Modbus TCP for the project.

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**Author:** ![reflink](https://avatars.discourse-cdn.com/v4/letter/r/e19adc/32.png) [@reflink](https://discourse.nodered.org/u/reflink)\
**Post date:** [13 March 2026 21:00 UTC](https://discourse.nodered.org/t/how-can-node-red-communicate-with-mitsubishi-fx3u-the-communication-uses-mitsubishis-programming-port-but-i-couldnt-find-a-usable-node-in-node-red-has-anyone-done-this-before/100296/5 "2026-03-13T21:00:16Z")

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I would just make a sensor node with maybe a esp32 card with-6 poe? and put 4-6 pt1000 sensors to it and regalate it with 0-10v. well it is maybe not : I would just .... but it is a good diy option