# How to read several slaves - Modbus RTU

**URL:** <https://www.wago.community/t/how-to-read-several-slaves-modbus-rtu/2859>\
**Category:** CODESYS\
**Created:** [August 26, 2026, 8:03am UTC](https://www.wago.community/t/how-to-read-several-slaves-modbus-rtu/2859 "2026-08-26T08:03:55Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Thruser](https://avatars.discourse-cdn.com/v4/letter/t/d26b3c/32.png) [@Thruser](https://www.wago.community/u/Thruser)\
**Post date:** [August 26, 2026, 12:40pm UTC](https://www.wago.community/t/how-to-read-several-slaves-modbus-rtu/2859/5 "2026-08-26T12:40:42Z")

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See [here](https://www.wago.community/t/modbustcp-wahrend-laufzeit-server-slave-hinzufugen-auslesen-schreiben/2470). A slightly different approach for .1 and .4 Steps

It is for Modbus TCP but you can easily adapt it to Modubs RTU function blocks.

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