If the light in the WC is switched on, then the ventilation should be switched on 15 seconds later (the ventilator must be connected to a digital output) and run for one minute after the light has been switched off. If the light is switched off before the ventilator is switched on, the ventilator should not be activated.
First open the app “logic” and create a logic program via “add program”.
Give the logic program the name WC-ventilation and select the room WC.
Open the logic program via the button “edit”. Use the “add function” to add the function time relay. This relay is red, meaning that it isn’t yet working, because there are no inputs.
Now open the time relay. Since the output should be switched on after 15 seconds, you will need a delay of 15 seconds. Change the switch on delay to a fixed value and enter the value 15. Do the same for the switch off delay, except instead of 15, use the value 60, since the ventilation is only meant to run for 1 minute (= 60 seconds) after the light has been switched off.
Now you need to link inputs and outputs. Select input E1 using the button “select” and navigate to the lights, select the WC light and select “light on”. In the object panel of the time delay, you can now see the current value of the light and how it changes when the light is switched on and off. Now all you need to do is connect the output of the time relay with the digital output. To do this, click on “select” under “output” and navigate to the digital outputs. Once there, select the desired output and click on “set value”.
Now you can test your WC ventilation and see if everything is working fine.