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since you want the logic to be triggered when the switch is open thenThe thing i have to do with the second button (reed switch), but couldnt find out how, is that i need to add a function that trigger if button in unpressed (circuit is open), and not when the button is pressed.
What do you exatcly mean by buttons of PLC??i need to make a function that arms and disarms the alarm using the buttons of the PLC, so if sensors, are triggered the boozer wont sound.