When you Press the RESET Button on the Arduino board, the timer will countdown from 60 seconds, as programmed. Once the timer countdown reaches 0 seconds, the PIEZO-BUZZER (BZ1) will bang on and the ...

To the left of the firmata block, I have a slow timer and a virtual switch. This goes through an OR gate and an inverter to drive pin 13 of my Arduino (the LED built into the board).

As a industrial controls engineer that has worked globally, keep the arduino in hobby zone where it belongs. There are machines running with 20, or 30 year old control systems that are PLC controlled.