> 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-library.md).

# HVAC Library

### Documentation

<a href="/spaces/6G4WDUYxjH3a0to8hJov/pages/12c84a494c7f6b2747157d67c58eed9846646a01" class="button secondary" data-icon="books">To the documentation</a>

### Current version

<details>

<summary>3.2.1.32 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVAC-3.2.1.32.compiled-library-v3" class="button primary" data-icon="arrow-down-to-line">Download</a></summary>

Release Date 03.04.2026

**New features and changes**

* General improvements
* XPuls error correction (edge after reset)
* Pulse error correction (edge after reset)
* Documentation link

***

*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-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td><a href="https://dl.powerio.com/downloads/HVAC-Library-3.2.1.32-cdbeca08d47d.spdx.json">Link to the SBOM (spdx)</a></td></tr><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>cdbeca08d47d</code></td></tr></tbody></table>

</details>

***

### Older versions

<details>

<summary>3.2.1.31 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.26.compiled-library-v3">Download</a></summary>

Release Date 26.03.2026

**New features and changes**

* FB 'PowerFeedOptimizer': optimizations / extensions

***

*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-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td><a href="https://dl.powerio.com/downloads/HVAC-Library-3.2.1.26-1b143f74e9d7.spdx.json">Link to the SBOM (spdx)</a></td></tr><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>1b143f74e9d7</code></td></tr></tbody></table>

</details>

<details>

<summary>3.2.1.29 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.26.compiled-library-v3">Download</a></summary>

Release Date 04.02.2026

**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-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td><a href="https://dl.powerio.com/downloads/HVAC-Library-3.2.1.26-1b143f74e9d7.spdx.json">Link to the SBOM (spdx)</a></td></tr><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>1b143f74e9d7</code></td></tr></tbody></table>

</details>

<details>

<summary>3.2.1.26 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.26.compiled-library-v3">Download</a></summary>

Release Date - 02.10.2025

**New FBs**

* AverageCh16
* SetPointCorrection
* BoolChanged

**Changes**

* Avoidance of the exception error 'DivisioByZero' in some FBs
* 'PowerFeedOptimizer'
  * Functions expanded and optimized
* Comma\_F function
* Adjustment of license check

***

*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></tbody></table>

</details>

<details>

<summary>3.2.1.25 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.25.compiled-library-v3">Download</a></summary>

Release Date - 02.10.2025

**New FBs**

* AverageCh16
* SetPointCorrection
* BoolChanged

**Changes**

* Avoidance of the exception error 'DivisioByZero' in some FBs
* 'PowerFeedOptimizer'
  * Functions expanded and optimized
* Comma\_F function
* Adjustment of license check

***

*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></tbody></table>

</details>

<details>

<summary>3.2.1.21 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.21.compiled-library">Download</a></summary>

Release Date 09.07.2025

**New FBs**

* 'Redundance16'
* 'WetBulbTemperature'
* 'FireDamperMot\_OnOff'

**Changes**

* FB 'ClockMaster32': the following parameters are now visible
  * arClock7d1Ch
  * FB\_PublicHoliday
  * FB\_SwitchTimeS
  * FB\_Holiday
  * ClockSlave32List
* 'PowerFeedOptimizer'
  * Input 'wActiveNumberOfDevices\_Con' added
  * Input 'wActiveNumberOfDevices\_Gen' added

</details>

<details>

<summary>3.2.1.19 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.19.compiled-library">Download</a></summary>

Release Date 11.06.2025

**New FB**

* 'PowerFeedOptimizer'

</details>

<details>

<summary>3.2.1.18 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.18.compiled-library">Download</a></summary>

Release Date 06.05.2025

**Changes**

* FB 'Shade': adjustment in the switching area when pressing the key between 'Full movement' and 'Slat adjustment'.
* FB 'FireDamperMot' and 'FireDamperMotSmoke': The output 'xAlarm' is now independent of test mode 'xTestEx'.

</details>

<details>

<summary>3.2.1.16 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.16.compiled-library">Download</a></summary>

Release Date 06.12.2024

**Changes**

* With the input 'xQuit', the timer for operating monitoring is restarted
  * 'Pump'
  * 'DuoPump'
  * 'DeviceSimple2'
  * 'DeviceSimple3'
  * 'Fan1speed'
  * 'Fan2speed'
  * 'FanAnalog'
  * 'FanControl'

**New FBs**

* 'Mux10BinFun'
* 'FileViewer'

</details>

<details>

<summary>3.2.1.14 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.14.compiled-library">Download</a></summary>

Release Date 25.04.2024

**Changes**

* FB 'AverageTime': bug fix in the method 'CalculateAverage'.
* FB 'MacroInfo': input 'xHint' added

</details>

<details>

<summary>3.2.1.12 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.12.compiled-library">Download</a></summary>

Release Date 05.04.2024

**Changes**

* FB 'Redundance2': When both devices are requested, the outputs of the master and the follow-up device are optionally enabled, although the follow-up device is faulty.

</details>

<details>

<summary>3.2.1.11 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.11.compiled-library">Download</a></summary>

Release Date 19.02.2024

**Extensions / changes to avoid exception errors of the type 'DevsisionByZero'**

* FB 'DampingT1'
* FB 'AverageTime'
* FB 'AverageTimeCal'

</details>

<details>

<summary>3.2.1.10 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.10.compiled-library">Download</a></summary>

Release Date 14.11.2023

**New FB**

* DisplayRealVisu

**Changes**

* Addition of input xForce in the FBs DeviceSimple2 and DeviceSimple3

</details>

<details>

<summary>3.2.1.9 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.9.compiled-library">Download</a></summary>

Release Date 07.11.2023

**New FB**

* FireDamper2

</details>

<details>

<summary>3.2.1.8 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.8.compiled-library">Download</a></summary>

Release Date 17.08.2023

**New features and changes**

* Clock structure expanded with variable ActivClocksVisu
* Global parameter gc\_iMaxSlaveList increased from 63 to 144

</details>

<details>

<summary>3.2.1.7 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.7.compiled-library">Download</a></summary>

Release Date 22.05.2023

**New features and changes**

* new PI controller ControlPIext
  * Function like ControlPI
  * the following parameters changed to inputs
    * rYDisabled
    * rInitValue
    * rKp
    * rTn
    * rYMin
    * rYMax

</details>

<details>

<summary>3.2.1.6 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.6.compiled-library">Download</a></summary>

Release Date 09.01.2023

**New features and changes**

* Documentation
* New FBs:
  * Redundance3
  * Redundance8

</details>

<details>

<summary>3.2.1.5 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.5.compiled-library">Download</a></summary>

Release Date 09.12.2022

**New features and changes**

* n.a.

</details>

<details>

<summary>3.2.1.4 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.4.compiled-library">Download</a></summary>

Release Date 08.12.2022

**New features and changes**

* n.a.

</details>

<details>

<summary>3.2.1.2 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.20-HVAC-3.2.1.2.compiled-library">Download</a></summary>

Release Date 11.10.2022

**New features and changes**

* n.a.

</details>

<details>

<summary>3.1.0.14 - HVAC - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.14.0-HVAC-3.1.0.14.compiled-library">Download</a></summary>

Release Date 11.10.2021

**New features and changes**

* n.a.

</details>

### Details


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