# EditPoti

## `EditPoti` (FB)

FUNCTION\_BLOCK EditPoti

### Short description

> Setpoint generator with edge-controlled increase / decrease of the setpoint.\
> The step size and the absolute minimum/maximum limits are adjustable.\
> Typical application: Individual adjustment of a base temperature.

### Representation

<figure><img src="/files/eb5fd1f3f1603a34a111448acf98659e6efaebed" alt=""><figcaption></figcaption></figure>

### Interfaces

#### Outputs

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

#### Setpoints / parameters

| Name             | Data type | Value range | Initial value | Function                 |
| ---------------- | --------- | ----------- | ------------- | ------------------------ |
| **xButtonUp**    | BOOL      |             | FALSE         | Increase of the setpoint |
| **xButtonDown**  | BOOL      |             | FALSE         | Decrease of the setpoint |
| **rJumpValue**   | REAL      | > 0         | 0.2           | Step size                |
| **rSetPointMin** | REAL      |             | -3.0          | Absolute minimum value   |
| **rSetPointMax** | REAL      |             | 3.0           | Absolute maximum value   |

### Function description

#### General

This function block is used to generate a setpoint at the output *rOut*.\
Every rising edge on the setpoint / parameter **xButtonUp** increases the output *rOut* by the step size **rJumpValue**.\
Every rising edge on the setpoint / parameter **xButtonDown** decreases the output *rOut* by the step size **rJumpValue**.\
The output *rOut* is limited to a value range between the absolute minimum value **rSetPointMin** and the absolute maximum value **rSetPointMax** is bounded.

> **Setting the step size rJumpValue**
>
> The step size **rJumpValue** may only take values greater than 0.\
> Values less than 0 are automatically reset to 0.
>
> **Setting the value range rSetPointMin and rSetPointMax**
>
> The following applies: **rSetPointMin** <= **rSetPointMax**\
> The following applies: **rSetPointMin** = **rSetPointMax** = **rOut**\
> If an input is made that does not observe the above rules, then automatically **rSetPointMin** = **rSetPointMax** is set.

### CODESYS

InOut:

| Scope       | Name           | Type   | Initial |
| ----------- | -------------- | ------ | ------- |
| Input Const | `rSetPointMax` | `REAL` | 3.0     |
| Input Const | `rSetPointMin` | `REAL` | -3.0    |
| Input Const | `rJumpValue`   | `REAL` | 0.2     |
| Input Const | `xButtonDown`  | `BOOL` | FALSE   |
| Input Const | `xButtonUp`    | `BOOL` | FALSE   |
| Output      | `rOut`         | `REAL` |         |


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