> 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/time/pulseshift.md).

# PulseShift

## `PulseShift` (FB)

FUNCTION\_BLOCK PulseShift

### Short description

> Edge-controlled, delayed pulse generation with adjustable pulse duration.

### Representation

<figure><img src="/files/2426fd6611420de0d5068de4260028385ca44e43" alt=""><figcaption></figcaption></figure>

### Interfaces

#### Inputs

| Name     | Data type | Value range | Initial value | Function                     |
| -------- | --------- | ----------- | ------------- | ---------------------------- |
| *xIN*    | BOOL      |             |               | Binary input                 |
| *tShift* | TIME      |             | T#1s          | Delay time                   |
| *tPT*    | TIME      |             | T#1s          | Duration of the output pulse |

#### Outputs

| Name  | Data type | Value range | Initial value | Function                                                                          |
| ----- | --------- | ----------- | ------------- | --------------------------------------------------------------------------------- |
| *xQ*  | BOOL      |             |               | Pulse output                                                                      |
| *tET* | TIME      |             |               | Time difference between the target duration and the duration of the pulse at *xQ* |

#### Setpoints / parameters

| Name      | Data type | Value range | Initial value | Function                        |
| --------- | --------- | ----------- | ------------- | ------------------------------- |
| **xTest** | BOOL      |             | FALSE         | Test input to trigger the pulse |

### Function description

#### General

At the pulse output *xQ* is generated after a positive edge at the binary input *xIN* and a subsequent delay time *tShift* a pulse with a duration *tPT* is generated.\
Alternatively, pulse generation without delay time can also be triggered by the setpoint / parameter **xTest** is triggered.

<figure><img src="/files/b44b0f50f49531f18516045c4bdd378e5f713b45" alt=""><figcaption></figcaption></figure>

#### time output *tET*

When the pulse output is active *xQ* The time difference between the target duration *tPT* and the duration of the pulse at *xQ* is displayed.\
When the pulse output is inactive, *xQ* the value T#0s is always displayed.

### CODESYS

InOut:

| Scope       | Name     | Type   | Initial    |
| ----------- | -------- | ------ | ---------- |
| Input       | `xIN`    | `BOOL` |            |
| Input       | `tShift` | `TIME` | TIME#1s0ms |
| Input       | `tPT`    | `TIME` | TIME#1s0ms |
| Input Const | `xTest`  | `BOOL` | FALSE      |
| Output      | `xQ`     | `BOOL` |            |
| Output      | `tET`    | `TIME` |            |


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