> 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-library/functionblocks/display/displayrealvisu.md).

# DisplayRealVisu

## `DisplayRealVisu` (FB)

FUNCTION\_BLOCK DisplayRealVisu

### Short description

> Display of a numerical value with correction value (visualization)\
> \
> Typical application: Calibration of a temperature sensor in the visualization\
> \
> Special feature: Unit, decimal places and further parameters are configured directly in the CFC editor and not in the visualization object.\
> This allows changes and limits to be modified online in the application without a download.

### Representation

<figure><img src="/files/ecd3a1140655ef7ceec941b9098681782450cd23" alt=""><figcaption></figcaption></figure>

### Interfaces

#### Inputs

| Name     | Data type | Value range | Initial value | Function    |
| -------- | --------- | ----------- | ------------- | ----------- |
| *rInRaw* | REAL      |             |               | Input value |

#### Outputs

| Name   | Data type | Value range | Initial value | Function             |
| ------ | --------- | ----------- | ------------- | -------------------- |
| *rOut* | REAL      |             |               | Numeric output value |

#### Setpoints / parameters

| Name                  | Data type | Value range | Initial value | Function                                                             |
| --------------------- | --------- | ----------- | ------------- | -------------------------------------------------------------------- |
| **xDisableSeparator** | BOOL      |             | FALSE         | TRUE = Disables the thousands separator in the visualization display |
| **bDecimals**         | BYTE      |             | 1             | Number of decimal places                                             |
| **sSymbol**           | STRING    |             |               | Symbol in the visualization                                          |
| **sUnit**             | STRING    |             |               | Unit of the input value                                              |
| **rOffset**           | REAL      |             | 0.0           | Correction value                                                     |

### Function description

#### General

The output value *rOUT* is formed by adding the input value *rInRaw* with the correction value **rOffset** formed.\
Additionally, further properties of the output value can be defined here, which however are used not in the function block but, for example, in a suitable visualization element.\
\
With the parameter **xDisableSeparator** the thousands separator in the visualization can be disabled.

### Visualization

Matching visualization element from the HVACV Visu Library: **DisplayRealVisu**

#### Representation

<figure><img src="/files/224d5f0493cb2cdc7436cbd1139047b9752389b8" alt=""><figcaption></figcaption></figure>

#### Interfaces Visu-Element

| Name            | Data type        | Type         | Initial value | Function                                                                                               |
| --------------- | ---------------- | ------------ | ------------- | ------------------------------------------------------------------------------------------------------ |
| **rValue**      | FB\_EditRealVisu | VAR\_IN\_OUT |               | Enter FB instance HVAC.EditRealVisu here e.g. PRG.EditRealVisu                                         |
| **iFieldSizeL** | INT              | VAR\_INPUT   | 0             | Field expands by the number of entered pixels to the left. Required to display long numbers or units.  |
| **iFieldSizeR** | INT              | VAR\_INPUT   | 0             | Field expands by the number of entered pixels to the right. Required to display long numbers or units. |

The following inputs of the FB HVAC.DisplayRealVisu are automatically adopted and can be changed at runtime: rOffset, sUnit, sSymbol, bDecimals, xDisableSeperator.

{% hint style="info" %}
Note: VAR\_IN\_OUT interfaces must be assigned, VAR\_INPUT are optional.&#x20;
{% endhint %}

### CODESYS

InOut:

| Scope       | Name                | Type     | Initial |
| ----------- | ------------------- | -------- | ------- |
| Input       | `rInRaw`            | `REAL`   |         |
| Input       | `xAlarm`            | `BOOL`   |         |
| Input Const | `xDisableSeparator` | `BOOL`   |         |
| Input Const | `bDecimals`         | `BYTE`   | 1       |
| Input Const | `sSymbol`           | `STRING` | ‘A’     |
| Input Const | `sUnit`             | `STRING` |         |
| Input Const | `rOffset`           | `REAL`   | 0       |
| Output      | `rOut`              | `REAL`   |         |


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