> 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/counter/operatinghours.md).

# OperatingHours

## `OperatingHours` (FB)

FUNCTION\_BLOCK OperatingHours

### Short description

> Counter for operating hours and switch-on events

### Representation

<figure><img src="/files/50bd05c3b8fcb04615d90d027e4c69c5f2724146" alt=""><figcaption></figcaption></figure>

### Interfaces

#### Inputs

| Name     | Data type | Value range | Initial value | Function               |
| -------- | --------- | ----------- | ------------- | ---------------------- |
| *xFb*    | BOOL      |             |               | Counter - input        |
| *xReset* | BOOL      |             | FALSE         | Enable - input - reset |

#### Outputs

| Name                | Data type       | Value range | Initial value | Function                                          |
| ------------------- | --------------- | ----------- | ------------- | ------------------------------------------------- |
| *udiOperatingHours* | UDINT           |             |               | Counter - output - operating hours                |
| *udiCountFb*        | UDINT           |             |               | Counter - output - switch-ons                     |
| *dtLastFb*          | DATE\_AND\_TIME |             |               | Date/time of the end of the last counting process |

### Function description

#### General

This function block is used to record the operating hours and switch-on events at the counter input *xFb*.\
The outputs *udiOperatingHours* and *udiCountFb* are reset to 0 as soon as a rising edge is detected at the input *xReset* A counting process is active as long as the counter input *xFb* is TRUE.\
The output *udiOperatingHours* shows the cumulative duration of the counting processes since the last reset operation in hours.\
The output *udiCountFb* is incremented with each rising edge at the input *xFb* is incremented.\
\
At the output *dtLastFb* the current date / time is available during the counting process.\
At the output *dtLastFb* the date / time at the end of the last counting process is available outside the counting process.\
At the output *dtLastFb* the initialization value DT#1970-1-1-0.0.0 is output before the first counting process.

> **Value ranges of the outputs&#x20;*****udiOperatingHours*****&#x20;and&#x20;*****udiCountFb***
>
> Valid counter values are within the limits 0 and 4294967295.\
> Incrementing the counter value 4294967295 resets the counter value to 0.\
> Subsequently the counter value is incremented continuously again.
>
> **Prerequisite for the use of the OperatingHours function block**
>
> The use of the TimeRead2 function block is required for correct operation.
>
> **Write access to the counter values**
>
> Via the path 'InstanceName.\_OperatingHours.udiOperatingHours' or 'InstanceName.\_OperatingHours.udiCountFb' write access to both counters is possible.

### CODESYS

InOut:

| Scope  | Name                | Type    | Initial |
| ------ | ------------------- | ------- | ------- |
| Input  | `xFb`               | `BOOL`  |         |
| Input  | `xReset`            | `BOOL`  | FALSE   |
| Output | `udiOperatingHours` | `UDINT` |         |
| Output | `udiCountFb`        | `UDINT` |         |
| Output | `dtLastFb`          | `DT`    |         |

Methods:

> mReset

Structure:

* mReset (Method)


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