> 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/downloads/en/codesys-hvac-downloads/hvac-bacnet-library.md).

# HVAC BACnet2 Library

### Documentation

<a href="/spaces/6G4WDUYxjH3a0to8hJov/pages/d68bfefabd12676ee3efd1ddaf759ee9e6e066f0" class="button secondary" data-icon="books">To the documentation</a>

### Current version

<details>

<summary>1.0.0.4 - HVACBACnet2 - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACBACNET2-1.0.0.4.compiled-library-v3" class="button primary" data-icon="arrow-down-to-line">Download</a></summary>

Release Date 15.10.2025

**New features and changes**

* General improvements

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>a2f03377349a</code></td></tr></tbody></table>

</details>

***

### Older versions

<details>

<summary>1.0.0.3 - HVACBACnet2 - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACBACNET2-1.0.0.3.compiled-library">Download</a></summary>

Release Date 12.09.2025

**New features and changes**

* Function block 'SRV\_MSV\_SMALL' newly added.
* Function block 'SRV\_AV\_SMALL':

```
In the enabled, unregistered state, the state of the output variable 'rPresentValue' is determined by the input variable 'rPresentValue_IN'.

The access permission for the property 'Relinquish Default' ('eAccessRightRelinquishDefault_IN') has been added.

The output 'xPresentValueOverride' has been functionally improved.

The output 'stProperties.udiCurrentCommandPriority' has been added.

The output 'stProperties.sCurrentCommandIPAdr' has been added.
```

* Function block 'SRV\_BV\_SMALL':

```
In the enabled, unregistered state, the state of the output variable 'xPresentValue' is determined by the input variable 'xPresentValue_IN'.

The access permission for the property 'Relinquish Default' ('eAccessRightRelinquishDefault_IN') has been added.

The output 'xPresentValueOverride' has been functionally improved.

The output 'stProperties.udiCurrentCommandPriority' has been added.

The output 'stProperties.sCurrentCommandIPAdr' has been added.
```

* Function block 'EditRealVisu' newly added.

</details>

### Details


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