> 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/codesys-hvac/en/hvac-modbusio2-lib/beschreibung.md).

# Description

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<figure><img src="/files/72fba7b8fcd00f3843135a7db9a11f0161ca002e" alt="" width="100"><figcaption></figcaption></figure>
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With the HVAC ModbusIO2 Library, you can use the appropriate H1.X I/O modules with minimal configuration, without additional engineering effort.
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***

So you can get started right away, we offer the library as a download. A license is not required for use. If you need further assistance, please do not hesitate to contact us.

<a href="/spaces/ltcbXgy6Y2teLoU01eGk/pages/5ee68d32399abd7eac77197fc3e4932a317955e8" class="button primary" data-icon="up-right-from-square">To the download</a> <a href="https://shop.powerio.com/shop/category/hvac-automation-produkte-modbus-ios-7" class="button primary" data-icon="shop">To the online shop</a> <a href="https://www.powerio.com/de/kontakt" class="button secondary" data-icon="question">Get support</a>

{% hint style="info" %}
**Licensing:**

This product can be used without restriction without purchasing a license.
{% endhint %}

### Overview

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<figure><img src="/files/33f8302bdeb43e44e66a78da2eb4b50934a5d125" alt="" width="563"><figcaption></figcaption></figure>

<p align="center"><em>Function blocks optimized for practical use. Easy use of Modbus I/O modules with a master function block and a slave function block.</em></p>
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{% column width="8.333333333333343%" %}

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***

### Description

This product enables the integration of the HVAC I/O modules.

In addition to the I/O configuration, there is a parameter window for each module. Settings such as slave address, bus timeout, send commands or polling intervals can be made. I/O treatments such as negation, two-point function, limit value, and filter function can also be configured. For the analog input module, sensor types such as PT1000, Ni 1000, NTC 10k, etc. can be selected directly.

<table data-view="cards"><thead><tr><th>Device</th><th>FB designation</th><th data-hidden>Shop</th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td>8AI - Analog inputs (H1.8AI.MOD)</td><td>H1_8AI</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100153-h1-8ai-mod-81?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/ed90cc0ac0c96efcbd316bf7030f74d7e7bea199">/files/ed90cc0ac0c96efcbd316bf7030f74d7e7bea199</a></td><td><a href="https://shop.powerio.com/shop/100153-h1-8ai-mod-1017">https://shop.powerio.com/shop/100153-h1-8ai-mod-1017</a></td></tr><tr><td>8AO - Analog outputs (H1.8AO.MOD)</td><td>H1_8AO</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100154-h1-8ao-mod-82?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/5068dd9c9f80a321415d49d185c9bb1e3098c6de">/files/5068dd9c9f80a321415d49d185c9bb1e3098c6de</a></td><td><a href="https://shop.powerio.com/shop/100154-h1-8ao-mod-1019">https://shop.powerio.com/shop/100154-h1-8ao-mod-1019</a></td></tr><tr><td>16DI - Digital inputs (H1.16DI.MOD)</td><td>H1_16DI</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100151-h1-16di-mod-79?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/9ad4fb1b88880dd74c4863e493e28af73e8c0a19">/files/9ad4fb1b88880dd74c4863e493e28af73e8c0a19</a></td><td><a href="https://shop.powerio.com/shop/100151-h1-16di-mod-1010">https://shop.powerio.com/shop/100151-h1-16di-mod-1010</a></td></tr><tr><td>8DO - Digital outputs (H1.8DO.MOD)</td><td>H1_8DO</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100156-h1-8do-mod-84?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/9989b88bf494aa50375607e9198870ce77f5aceb">/files/9989b88bf494aa50375607e9198870ce77f5aceb</a></td><td><a href="https://shop.powerio.com/shop/100156-h1-8do-mod-1021">https://shop.powerio.com/shop/100156-h1-8do-mod-1021</a></td></tr><tr><td>8DO-R - Digital outputs with relays (H1.8DO-R.MOD)</td><td>H1_8DOR</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100155-h1-8do-r-mod-83?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/f5f251794127ca0e94de7a8a3aff23c7f1d5318d">/files/f5f251794127ca0e94de7a8a3aff23c7f1d5318d</a></td><td><a href="https://shop.powerio.com/shop/100155-h1-8do-r-mod-1023">https://shop.powerio.com/shop/100155-h1-8do-r-mod-1023</a></td></tr><tr><td>4DO-R - Digital outputs with relays (H1.4DO-R.MOD)</td><td>H1_4DOR</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100152-h1-4do-r-mod-80?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/dcbd5879ca3bd9ca20c6907bb75caedb5c46e6a0">/files/dcbd5879ca3bd9ca20c6907bb75caedb5c46e6a0</a></td><td><a href="https://shop.powerio.com/shop/100152-h1-4do-r-mod-1015">https://shop.powerio.com/shop/100152-h1-4do-r-mod-1015</a></td></tr><tr><td>4DIO-R - Digital inputs and outputs with relays (H1.4DIR</td><td>H1_4DIOR</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100157-h1-4dio-r-mod-85?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/2c0efa68d7c5b008b4a0efef0fcfc77d7d574829">/files/2c0efa68d7c5b008b4a0efef0fcfc77d7d574829</a></td><td><a href="https://shop.powerio.com/shop/100157-h1-4dio-r-mod-1013">https://shop.powerio.com/shop/100157-h1-4dio-r-mod-1013</a></td></tr><tr><td>4DI2DO-R-3P - 3-point actuators (H1.4DI2DO-R-3P.MOD)</td><td>H1_4DI2DOR-3P</td><td><i class="fa-shop">:shop:</i> <a href="https://shop.powerio.com/shop/product/100204-h1-4di2do-r-3p-mod-239?category=7#attr=">Shop link</a></td><td data-object-fit="contain"><a href="/files/9cdf3c04574b31ce6f370907263d2a9d230ae2d5">/files/9cdf3c04574b31ce6f370907263d2a9d230ae2d5</a></td><td><a href="https://shop.powerio.com/shop/100204-h1-4di2do-r-3p-mod-1012">https://shop.powerio.com/shop/100204-h1-4di2do-r-3p-mod-1012</a></td></tr></tbody></table>

***

### Details

| **Documentation Version**      | <code class="expression">space.vars.HVACModbusIO2\_Library\_latest</code> |
| ------------------------------ | ------------------------------------------------------------------------- |
| **Placeholder**                | `HVACModbusIO2`                                                           |
| **Available in CODESYS Store** | *Yes*                                                                     |
| **Programming System**         | *CODESYS V3.5.17.2 or higher*                                             |
| **Runtime System**             | *CODESYS Control V4.2.0.0 or higher*                                      |
| **License**                    | *License-free*                                                            |

***


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