> 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/input-output/data-inputs/rising-edge.md).

# Rising Edge

This function block generates a boolean rising-edge signal after a configured delay. It can operate either in time-based mode (seconds) or in sample-based mode (number of iterations). Use the `Reset` input to restart the timing/counting and clear the triggered state.

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

`Reset` Provide a boolean signal to reset the block's internal timer/counter and clear the triggered state.\
(Shown as a socket under inputs)

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

`Boolean` A boolean output that becomes TRUE when the configured delay/count is reached and remains TRUE until a reset is provided.\
(Shown as a socket under outputs)

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

`Rising Time (s | #)` Set the delay amount. Interpreted as seconds when mode is `Seconds` and as number of samples when mode is `Samples`.\
`Mode` Toggle between `Seconds` and `Samples` operation. The control shows `Seconds` when time-based and `Samples` when sample-based.

## ⚙️ How it works <a href="#how-it-works" id="how-it-works"></a>

* On first activation the block starts counting automatically.
* In `Seconds` mode the block measures real elapsed time and switches the output to TRUE once the elapsed time reaches the value set in `Rising Time (s | #)`.
* In `Samples` mode the block counts each evaluation cycle and switches the output to TRUE once the configured sample count is reached.
* After the output becomes TRUE it stays TRUE until a TRUE is supplied to the `Reset` input, which restarts the internal timer/counter and returns the output to FALSE.

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

1. Choose operation mode with the `Mode` control (`Seconds` or `Samples`).
2. Enter the desired delay/count into `Rising Time (s | #)`.
3. Supply a TRUE signal to `Reset` whenever you need to restart the delay/count.
4. Use the block's boolean output as a trigger for downstream blocks when the delay/count completes.

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

* Simple time- or sample-based trigger generation.
* Persistent triggered state until explicit reset, making it suitable as a latch for one-shot events.
* Compact interface with an editable numeric field and a clear mode switch.

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

* To capture an image after a short delay, use this block with `Camera USB` and then connect its output to `Image Logger` or `Image Write` to save the captured frame when the rising edge becomes TRUE.
* Start and stop video recordings by linking the output to `Record Video` (use the rising edge to start and a separate logic sequence to stop).
* Use `Delay Step` together with this block to create delayed pulses or to shape the trigger timing in multi-step flows.
* Combine with `Logic Input` to provide a manual reset or timed start conditions.
* Visualize the trigger activity by routing the boolean to `Scope` or log events with `CSV Export` for long-term monitoring.
* Use `Counter` downstream to count how many times the rising edge has been reached in a run.

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

* If the output never becomes TRUE, verify the `Mode` setting and confirm the value in `Rising Time (s | #)` is appropriate (not set too large).
* If the output immediately stays TRUE, check whether a reset is being held active or whether the configured time/count is zero or very small.
* For timing issues, ensure the system running the flow is not paused or blocked, since sample-based counting depends on evaluation cycles while time-based counting depends on real elapsed time.