Chapter 9 Flashcards
1
Q
2 categories of discrete process control
A
Logic Control-event driven
Sequence control-time driven
2
Q
What is a PLC
A
A microprocessor based controller that uses stores instructions in programmable memory to implement logic
3
Q
4 basic components of a PLC
A
processor
Memory
Power Supply
I/0 module
4
Q
Describe the 3 parts of PLC scanning
A
Input scan:inputs read and stored
Program scan:control program is executed
Output scan:Outputs are update for calculated value
5
Q
What is a PAC
A
Programmable Automation Controller operates in the same scope as a PLC but also has the capabilities of a personal computer
