Led Output

This function block provides a simple visual indicator for boolean signals. Use it to quickly check whether a condition in your scenario is TRUE, FALSE, or undefined.

📥 Inputs

Boolean This input socket accepts a boolean signal to drive the LED indicator. Connect any logic or condition output here.

📤 Outputs

This function block does not have outputs.

🕹️ Controls

led Visual LED indicator shown on the block:

• Gray — input is undefined / None.

• Green — input is TRUE.

• Red — input is FALSE.

🎨 Features

• Real-time visual feedback for boolean signals.

• Clear color coding for three states: undefined, TRUE, and FALSE.

• Lightweight and suitable for dashboards or quick debugging.

📝 Usage Instructions

1. Provide a boolean signal to the Boolean input.

2. Observe the led color to understand current state:

   • Green for TRUE

   • Red for FALSE

   • Gray when no value is present

Use this block on UI screens where immediate visual feedback is helpful.

📊 Evaluation

When the scenario runs, the block checks the boolean value arriving at the Boolean socket and updates the led color accordingly. If no value is present, the indicator shows the undefined state.

💡 Tips and Tricks

• For manual testing, connect a Logic Input to the Boolean socket so an operator can toggle the LED on the fly.

• Combine condition checks before the LED using logic blocks such as And, Or, and Not to visualize combined conditions.

• Use comparison blocks like Equals, Greater, or Smaller to convert numeric measurements into boolean signals for the LED.

• Use edge detectors such as Rising Edge or Edge Rising to show event pulses instead of continuous states.

• Add temporal behavior with Delay Step, ON Delay, or OFF Delay if you want the LED to respond only after a sustained condition.

• Use Set - Reset to latch a condition and keep the LED on until explicitly reset.

• Integrate with data or communication blocks upstream (for example, use Data Write Local / Data Write Global or MQTT Publish on the logic feeding this block) to reflect remote or network-driven states locally.

🛠️ Troubleshooting

• LED stays gray: Check that the previous block is producing a boolean value. Consider using Is None or a simple Logic Input to test the path.

• LED always red/green but condition seems wrong: Verify the upstream logic (comparisons, merges) with intermediate indicators or debug blocks before connecting to the LED.

• Need persistent indicator for transient events: Use Set - Reset or an edge-to-latch pattern so a short pulse becomes a sustained visual state.