> For the complete documentation index, see [llms.txt](https://support.powerio.com/hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.powerio.com/hub/powerio-r-system/en/applications/available-apps/codesys.md).

# CODESYS

<figure><img src="/files/5bc000400cf07f9797eae5812933d6ca4e19321e" alt="" width="200"><figcaption><p>CODESYS User application</p></figcaption></figure>

## Description

CODESYS can be installed as a runtime on the powerIO Device to make it usable for building automation and as an IoT controller. Installing the CODESYS Runtime creates a flexible control and automation platform that is ideal for various applications in the field of building automation and the Internet of Things (IoT).

## Quick start

1. [Download here](/hub/downloads/en/user-applications/codesys.md) - *Download the Application free of charge and without registration/login*
2. [To the drag & drop instructions](/hub/powerio-r-system/en/applications/installation.md) - *Install the Application in just three simple steps*

## Functions

With the User Application, you can use any powerIO Device as a controller for building automation. Thanks to the powerIO ecosystem, you have the option of accessing a large number of ready-made functions and macros. Take a look at our [CODESYS HVAC ](https://support.powerio.com/hub/codesys-hvac/en/)section.


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