# Demo Modbus or Ethernet Softwares

**URL:** <https://discourse.nodered.org/t/demo-modbus-or-ethernet-softwares/56377>\
**Category:** Industrial\
**Created:** [10 January 2022 07:18 UTC](https://discourse.nodered.org/t/demo-modbus-or-ethernet-softwares/56377 "2022-01-10T07:18:47Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![OmkarNodered](https://avatars.discourse-cdn.com/v4/letter/o/90ced4/32.png) [@OmkarNodered](https://discourse.nodered.org/u/OmkarNodered)\
**Post date:** [10 January 2022 07:18 UTC](https://discourse.nodered.org/t/demo-modbus-or-ethernet-softwares/56377/1 "2022-01-10T07:18:47Z")

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Hii.. I am trying to build node red gateway that will talk to plcs to get the data using modbus/Ethernet. So, Can anyone suggest me any demo plc software so that I can connect node red to that plc?

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**Author:** ![UnborN](https://avatars.discourse-cdn.com/v4/letter/u/4491bb/32.png) [@UnborN](https://discourse.nodered.org/u/UnborN)\
**Post date:** [10 January 2022 07:22 UTC](https://discourse.nodered.org/t/demo-modbus-or-ethernet-softwares/56377/2 "2022-01-10T07:22:40Z")

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Hello Omkar,

For Modbus slave simulation i use [pyModSlave](https://sourceforge.net/projects/pymodslave/)

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/5/f5cee3b7ec502ef0e75ac137812a650c2f3babb3.png)

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**Author:** ![OmkarNodered](https://avatars.discourse-cdn.com/v4/letter/o/90ced4/32.png) [@OmkarNodered](https://discourse.nodered.org/u/OmkarNodered)\
**Post date:** [10 January 2022 07:25 UTC](https://discourse.nodered.org/t/demo-modbus-or-ethernet-softwares/56377/3 "2022-01-10T07:25:36Z")

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Can we create tags in that 'pyModSlave' software? I just want to the data which is frequently changing?

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**Author:** ![UnborN](https://avatars.discourse-cdn.com/v4/letter/u/4491bb/32.png) [@UnborN](https://discourse.nodered.org/u/UnborN)\
**Post date:** [10 January 2022 07:40 UTC](https://discourse.nodered.org/t/demo-modbus-or-ethernet-softwares/56377/4 "2022-01-10T07:40:24Z")

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Tags ? no its just for Modbus .. sorry im not familiar with modbus having tags.

maybe you add them later once you read the registers you need with **[node-red-contrib-modbus](https://flows.nodered.org/node/node-red-contrib-modbus)**

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [11 March 2022 07:40 UTC](https://discourse.nodered.org/t/demo-modbus-or-ethernet-softwares/56377/5 "2022-03-11T07:40:47Z")

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