Questions

1. Which is the component that carries out the actions on a physical process?
   1. The sensor
   2. The actuator
2. What is a device, according to the IEC 61131 standard definition?
   1. A device is defined as an independent physical entity able to implement one or more functionalities
   2. A device is a logical breakdown of a software or hardware structure
3. What is an event, according to the IEC 61131 standard definition?
   1. An event is a representation of a fact in a suitable format for the communication and elaboration by the resource
   2. An event is an occurrence of a specific condition, such as the reaching of a definite temperature

4. What is a discrete process?
   1. A process characterized by processing cycles based on single parts or individual units of a product
   2. A process involving finite quantities of the final product obtained from finite quantities of raw materials, and processed according...