PROGRAMMABLE LOGIC CONTROLLERS (LOOSE PA
5th Edition
ISBN: 9781264206216
Author: Petruzella
Publisher: MCG
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Chapter 10, Problem 13RQ
Program Plan Intro
Data comparison instructions:
- Data comparison instructions refer to input instructions.
- It is used to compare two numerical data values and take decisions based on the program instructions.
- It can also be used to check the numerical value pairs for determining if a rung is true.
- The basic set of data comparison functions performed by PLCs are as follows:
- Equal to (=)
- Not equal to (!=)
- Less than (<)
- Greater than (>)
- Less than or equal to(<=)
- Greater than or equal to (>=)
- The above given compare instructions are used to compare the values of source A and source B.
Terms used:
The following terms are used in the instruction.
- Source A
- Source A refers to the address of the first piece of data that is used in the instruction.
- Source B:
- Source B refers to the address of the second piece of data that is used in the instruction.
Explanation of Solution
b.
LESS THAN instruction:
- The LESS THAN (LES) instruction is used to test whether the given value is less than the other value or not.
- If the given value such as Source A is less than Source B, then the instruction is logically true. Otherwise, the given instruction is logically false.
Explanation:
In the given logic rung,
- The output D is energized whenever input C is true...
Explanation of Solution
c.
GREATER THAN OR EQUAL instruction:
- The GREATER THAN OR EQUAL (GEQ) instruction is used to test whether the given value is greater than or equal to the other value or not.
- If the given value such as Source A is greater than or equal to Source B, then the instruction is logically true. Otherwise, the given instruction is logically false.
Explanation:
In the given logic rung,
- The output F is energized whenever input E is true...
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Chapter 10 Solutions
PROGRAMMABLE LOGIC CONTROLLERS (LOOSE PA
Ch. 10 - In general, what do data manipulation instructions...Ch. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Prob. 4RQCh. 10 - Prob. 5RQCh. 10 - Prob. 6RQCh. 10 - Prob. 7RQCh. 10 - Prob. 8RQCh. 10 - Prob. 9RQCh. 10 - Prob. 10RQ
Ch. 10 - Prob. 11RQCh. 10 - Prob. 12RQCh. 10 - Prob. 13RQCh. 10 - Prob. 14RQCh. 10 - Prob. 15RQCh. 10 - Prob. 16RQCh. 10 - Prob. 17RQCh. 10 - Prob. 18RQCh. 10 - Prob. 19RQCh. 10 - Prob. 20RQCh. 10 - Prob. 21RQCh. 10 - Prob. 22RQCh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Write a program that will cause a light to come on...Ch. 10 - Write a program that will cause a light to come on...
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