Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 1, Problem 5P
Program Plan Intro
AND Operator:
- An AND operator accepts two inputs and produces a single output.
- If both the inputs are CLOSE, then the output is ON. Otherwise, the output is OFF.
- In Boolean expression, the AND operation is expressed using the “.” dot operator or “*” asterisk operator.
where A and B are the inputs and X is the output.
Truth table for AND operator:
| INPUTA |
INPUT B |
OUTPUT X |
| OPEN | OPEN | OFF |
| OPEN | CLOSE | OFF |
| CLOSE | OPEN | OFF |
| CLOSE | CLOSE | ON |
OR Operator:
- An OR operator accepts two inputs and produces a single output.
- If both the inputs are OPEN, then the output is OFF. Otherwise, the output is ON.
- In Boolean expression, the OR operation is expressed using the “+” plus sign.
where A and B are the inputs and X is the output.
Truth table for OR operator:
| INPUTA |
INPUT B |
OUTPUT X |
| OPEN | OPEN | OFF |
| OPEN | CLOSE | ON |
| CLOSE | OPEN | ON |
| CLOSE | CLOSE | ON |
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Chapter 1 Solutions
Programmable Logic Controllers
Ch. 1 - Prob. 1RQCh. 1 - Identify four tasks in addition to relay switching...Ch. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Prob. 5RQCh. 1 - Prob. 6RQCh. 1 - Explain the main function of each of the following...Ch. 1 - What are the two most common types of PLC...Ch. 1 - Prob. 9RQCh. 1 - Prob. 10RQ
Ch. 1 - Answer the following with reference to the process...Ch. 1 - Prob. 12RQCh. 1 - Answer the following with reference to the process...Ch. 1 - Prob. 14RQCh. 1 - Compare the PLC and PC with regard to: a. Physical...Ch. 1 - Prob. 16RQCh. 1 - Prob. 17RQCh. 1 - Prob. 18RQCh. 1 - Prob. 19RQCh. 1 - Prob. 20RQCh. 1 - List five factors affecting the memory size needed...Ch. 1 - Prob. 22RQCh. 1 - Given two single-pole switches, write a program...Ch. 1 - Given two single-pole switches, write a program...Ch. 1 - Prob. 3PCh. 1 - Prob. 4PCh. 1 - Prob. 5P
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