> 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/numeric/offset.md).

# Offset

## `Offset` (FB)

FUNCTION\_BLOCK Offset

### Short description

> Addition of a correction value to a numerical input value\
> Typical application: Calibration of a temperature sensor

### Representation

<figure><img src="/files/af9d927d8b169dae67f44a4cfce062dae9d0e07d" alt=""><figcaption></figcaption></figure>

### Interfaces

#### Inputs

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

#### Outputs

| Name        | Data type | Value range | Initial value | Function     |
| ----------- | --------- | ----------- | ------------- | ------------ |
| *rValueOUT* | REAL      |             |               | Output value |

#### Setpoints / parameters

| Name        | Data type | Value range | Initial value | Function         |
| ----------- | --------- | ----------- | ------------- | ---------------- |
| **rOffset** | REAL      |             |               | Correction value |

### Function description

#### Analog value output *rOut*

The output value *rValueOUT* is formed by adding the input value *rValueIN* with the correction value **rOffset** formed.

### CODESYS

InOut:

| Scope       | Name        | Type   |
| ----------- | ----------- | ------ |
| Input       | `rValueIN`  | `REAL` |
| Output      | `rValueOUT` | `REAL` |
| Input Const | `rOffset`   | `REAL` |


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