> 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/general/ctod.md).

# CToD

## `CToD` (FB)

FUNCTION\_BLOCK CToD

### Short description

> Conversion of the time components minutes/hours into a time of day (TOD)

### Representation

<figure><img src="/files/828ecda6dc719577bfec74ff4f0e7fc6870633fc" alt=""><figcaption></figcaption></figure>

### Interfaces

#### Inputs

#### Outputs

| Name      | Data type | Value range      | Initial value | Function           |
| --------- | --------- | ---------------- | ------------- | ------------------ |
| *todHHMM* | TOD       | 0 … 23:59:59:999 |               | Time in TOD format |

#### Setpoints / parameters

| Name    | Data type | Value range | Initial value | Function                                          |
| ------- | --------- | ----------- | ------------- | ------------------------------------------------- |
| **iMM** | INT       |             | 0             | Specification of the minutes in MM format (0..59) |
| **iHH** | INT       |             | 0             | Specification of the hours in HH format (0..23)   |

### Function description

#### General

This function block is used to form the time of day *todHHMM* from the individual components **iMM** and **iHH**.\
The logical input limits of the individual components are monitored.\
If an input is made outside the specified limits, the output *todHHMM* is set to TOD#0:0:0.\
This block can be used, for example, for input in a visualization.\
The logical input limits of the individual components are monitored and corrected if necessary.\
The logical input limits of the individual components are monitored.\
If an input is made outside the specified limits, the output (todHHMM) is set to TOD#0:0:0.\
This block can be used, for example, for input in a visualization.

### CODESYS

InOut:

| Scope       | Name      | Type  | Initial |
| ----------- | --------- | ----- | ------- |
| Input Const | `iMM`     | `INT` | 0       |
| Input Const | `iHH`     | `INT` | 0       |
| Output      | `todHHMM` | `TOD` |         |


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