Feedback with LED Diode

To provide visual confirmation that a light or dimmer channel is active, you can connect an LED diode to a digital output on the IHC output 24 module. This diode will light up when the corresponding LED dimmer channel is switched on. The feedback is managed through KNX group objects and can be optimized using a simple event script.

Configuring LED Diode Feedback

Follow these steps:

Connect the LED diode to the output module
Physically wire the LED diode to a digital output on the IHC Output 24 module. For example, you can use output dataline 1.07.
Assign the binary output group object
In the IHC Plugin, configure the output device and assign a Binary output group object. This group object must be the same as the one used in the Status feedback field of the corresponding LED dimmer channel.

The connection via KNX group objects is the following:
Save the configuration
Apply the changes to ensure the LED diode responds to the dimmer’s status updates.

The LED dimmer channel sends feedback every 2 seconds, so the diode may not light up instantly after switching.

NOTE: You can invert the state of the feedback LED diode by selecting the Invert output option in the Output device configuration. In this case, the LED is switched ON when the LED dimmer channel is OFF, and vice versa. A typical use case for this configuration is when the LED diode is used as a navigation light in a dark room or corridor, where the LED should remain ON while the main light is OFF.

Improving Feedback Responsiveness

To make the LED diode respond immediately when the dimmer is switched on, you can create a simple event script.

Open the event script editor in your controller
Go to the Configurator > Objects tab and locate the group object assigned to the LED dimmer channel’s status.
Create a new event script
Click the icon next to the object name to open the event script editor.
Enter the script code
Paste the following code into the editor:
```
if event.getvalue() == true then
  grp.write('LED DIM 0x80 status FB', true) -- feedback hack/optimization
end
```
NOTE: Make sure the string LED DIM 0x80 status FB matches the actual name of your status feedback group object.
Save and enable the script
Save the script and ensure it is enabled.

The LED diode will now update immediately when the corresponding dimmer channel is turned on.