What is a scanner, and what does it do?

What is a scanner, and what does it do? 2. What is a scanlist? 3. What is SERCOS? 4. What is ControlNet used for? 5. Which of the following can a ControlLogix system be used for? a. A stand-alone controller b. A process controller c. A motion controller d. A communications gateway e. All of the above. f. a, c, and d 6. Define the acronym NUT. 7. What is CSMA/CD? 8. What does the term deterministic mean, and why is it important in industrial communications?