Discussion Forum: Industrial Elecronics
Post your response to the following discussion questions.
? PLCs have found numerous applications in industrial and other uses. While they have advantages over electromechanical relays, they also have limitations. Discuss the advantages and limitations of PLCs over electromechanical relays.
? Answer the following Questions-
1. Name all the major component parts of a PLC system.
2. Describe each of the major components in a PLC system.
3. What is the difference between fixed and modular I/O?
4. The Allen Bradley SLC system input address is I:3/12. Describe what each value in the address represents.
5. Describe the operation of examine on and examine off contacts when they are connected to NO and NC field devices.
6. Describe the PLC scan cycle.
7. Describe the operation of TON, TOF, and RTO timers.
8. List the timer instruction bits and describe how they change for different timer states.
9. List the counter instruction bits and describe how they change for different counter states.