# Introduction

CODESYS® is the leading manufacturer-independent IEC-61131-3 automation software for engineering control systems.

powerIO® provides libraries as well as training and support for building automation based on CODESYS. In addition, there is powerIO® hardware (controllers, IOs and decentralized modules) that can be programmed with CODESYS.

***

**Fast engineering** – Pre-fabricated function blocks and macros drastically reduce your development time.

**Optimized workflows** – Our libraries are coordinated with each other and follow uniform standards. That means fewer sources of error and more efficient commissioning.

**Practical training** – We offer targeted training so your team can use the libraries productively right away. From basics to advanced applications.

**Personal support** – If you have any questions, we are at your side – fast, competent and solution-oriented.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://support.powerio.com/hub/codesys-hvac/en/overview/instruction.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.