> For the complete documentation index, see [llms.txt](https://docs.augelab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.augelab.com/function-blocks/blocks-reference/data-logic/signal-operators/off-delay.md).

# OFF Delay

This function block holds a boolean signal high for a configurable time when the input changes from True to False. Use it to prevent brief false pulses from immediately turning an output off.

## 📥 Inputs <a href="#inputs" id="inputs"></a>

`Input Signal` A boolean signal that controls the block. Provide `True`/`False` values (or connect a boolean-producing function block).

## 📤 Outputs <a href="#outputs" id="outputs"></a>

`Output Signal` The resulting boolean after the off-delay logic. When the input falls from True to False, this output remains True until the configured delay elapses.

## 🕹️ Controls <a href="#controls" id="controls"></a>

`Delay Time (seconds)` Set how long the output stays True after the input goes False. Enter the delay duration in seconds (supports decimal values).

## ⚙️ Running mechanism <a href="#running-mechanism" id="running-mechanism"></a>

* The block monitors the incoming boolean signal and remembers its recent state.
* When the input transitions from True to False, an internal timer starts and the block keeps the `Output Signal` as True.
* If the configured delay time passes without the input returning to True, the block then sets the `Output Signal` to False.
* If the input returns to True before the delay finishes, the delay is canceled and the output follows the input immediately.
* On initial start the block waits for the first input change to begin normal operation.

## 🎯 Features <a href="#features" id="features"></a>

* Prevents short-lived false pulses from toggling downstream logic.
* Simple numeric control for delay length in seconds.
* Works with any boolean-producing blocks or signals in your scenario.
* Stateless on removal — releases internal timers when removed from the flow.

## 📝 Usage instructions <a href="#usage" id="usage"></a>

1. Connect a boolean source (for example a manual switch or a logic-producing block) to the `Input Signal`.
2. Set `Delay Time (seconds)` to the duration you want the output to remain True after a falling edge.
3. Use the `Output Signal` to drive downstream logic or indicators.

## 💡 Tips and Tricks <a href="#tips-and-tricks" id="tips-and-tricks"></a>

* For manual testing, use the `Logic Input` block as a controllable boolean source.
* To add a delay on the rising edge as well, pair this block with the `ON Delay` block for symmetric behaviour.
* Detect single transitions then delay the fall by combining with the `Rising Edge` block upstream.
* Use logical combinations like `And`, `Or`, or `Set - Reset` with this block to create more advanced control flows (for example, require multiple conditions to be True before the delay behavior is allowed).
* Connect the output to `Led Output` or `Scope` to visualize or indicate the delayed state in the UI.

## 🛠️ Troubleshooting <a href="#troubleshooting" id="troubleshooting"></a>

* If the output never goes False: check the value entered in `Delay Time (seconds)` and confirm the input actually transitions to False.
* If the output drops immediately: verify the input truly went from True to False and that no upstream blocks (like a pulse generator) are briefly forcing the input low.
* If you need to ignore spurious signals, consider adding a short `ON Delay` before this block or pre-filtering with logical conditions.