> 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/logic/set-reset.md).

# Set - Reset

A simple latch-style logic block that stores a boolean state. Use it when you want a trigger to turn something on and another trigger to turn it off, while keeping the last state between evaluations.

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

* `Set` Send a TRUE signal to set the latched output.
* `Reset` Send a TRUE signal to clear the latched output.

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

* `Check` Current latched boolean value (TRUE when set, FALSE when reset).

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

No interactive controls or widgets. This block only uses its input sockets to change the latched state.

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

* Latching behavior that preserves the last output until changed.
* `Reset` takes precedence: when `Reset` is active the output is cleared regardless of `Set`.
* Stable output suitable for feeding other logic, counters, indicators, or actuators.

## 📝 How to use <a href="#usage" id="usage"></a>

1. Connect a momentary or conditional signal to `Set` to switch the latch on.
2. Connect a separate signal to `Reset` to switch the latch off.
3. Use the `Check` output as a persistent enable/flag for subsequent processing or outputs.

## 📊 Behavior during run <a href="#evaluation" id="evaluation"></a>

* If `Reset` is TRUE the output becomes FALSE.
* Else if `Set` is TRUE the output becomes TRUE.
* Else the output remains at its previous value.

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

* Use `Logic Input` for manual control of `Set` and `Reset` during testing.
* Pair with `Rising Edge` or `Edge Rising` when your trigger is a momentary pulse so the latch toggles only once per event.
* Use `Delay Step`, `ON Delay` or `OFF Delay` to create timed resets or to implement simple debouncing for noisy signals.
* Combine with `Counter` to count occurrences while the latch is active; feed the latch output into the counter enable.
* Use `And`, `Or` and `Not` to build more complex set/reset conditions (for example require multiple conditions before setting).
* Drive a visual indicator using `Led Output` or send the latched state to `Output` for external systems.

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

* If the latch never changes, verify the upstream block is sending a changing boolean and consider using `Rising Edge` to convert a continuous TRUE into a single trigger.
* If the latch immediately clears when you try to set it, check whether the `Reset` input is being driven TRUE by another block.
* For bouncing or repeated triggers, add `Delay Step` or an appropriate edge detector to avoid multiple unintended toggles.