# Edge Rising This function block detects when a boolean signal transitions from False to True (a rising edge). Use it to trigger actions only once when an input turns on, preventing repeated triggers while the input stays True. ## đŸ“Ĩ Inputs `Input` A boolean signal to be monitored for a rising edge. ## 📤 Outputs `Output` A boolean that becomes True for one evaluation step when a rising edge is detected, otherwise False. ## 🕹ī¸ Controls This block has no interactive controls. It operates automatically on its input signal. ## 🎨 Features * Single-step trigger on rising transitions: the block outputs True only once when the input changes from False to True. * Simple state memory: the block remembers the previous input state to detect transitions. * Lightweight and fast: suitable for use in logic flows where one-shot triggering is required. ## ⚙ī¸ How it works On each run, the block compares the current boolean input to its remembered previous state. If the previous state was False and the current input is True, the block emits a single True on the `Output` for that run. If the input remains True on subsequent runs, the block keeps the `Output` False until the input goes False and rises again. ## 📝 Usage Instructions 1. Connect a boolean source (e.g., a sensor signal or a manual switch) to the `Input`. 2. Use the block's `Output` to drive actions that should occur only once per activation (for example, start a recording, log an event, or open a window). 3. If you need to reset or re-arm the trigger logic based on other conditions, combine this block with logic blocks listed below. ## 💡 Tips and Tricks * Combine with `Logic Input` to test manual triggers from the UI. * Use together with `Delay Step` to add a one-step delay before downstream processing. * Pair with `Edge Falling` to detect both rising and falling transitions for complete edge monitoring. * Use alongside `Set - Reset` or `Counter` to implement latch or counting behavior that reacts once per activation. * Chain with logical blocks such as `And`, `Or`, or `Not` to build more complex trigger conditions (for example: trigger only when a condition is true AND a rising edge occurs). * When feeding visual actions, connect the `Output` to blocks like `Show Image` to display results only when activation happens. (hint) For flows where multiple boolean signals must all trigger together, precede this block with `All True` to reduce false triggers. ## 🛠ī¸ Troubleshooting * If the block never outputs True: ensure the connected boolean signal actually changes from False to True (not from None or a constant True). * If the block outputs True repeatedly while the input stays True: make sure no upstream logic is repeatedly toggling the input; the block only emits True on a transition from False to True. * If you need to re-arm the trigger after an action, use a combination of boolean logic blocks (for example `Set - Reset`) to control when the monitored input is allowed to produce a new rising edge. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.augelab.com/function-blocks/data-logic/signal-operators/edge-rising.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.