Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 11, Problem 7P
Program Plan Intro
Math instruction:
- Math instructions refer to all output instructions that uses the data of two words or registers and perform the desired function.
- Math instructions are programmed based on the type of processor used.
- The data manipulation instructions are almost similar to math instructions.
- Math instructions are normally used to perform arithmetic functions on the values stored in memory words or registers.
Math functions:
The basic math functions performed by PLCs are as follows:
- Addition
- This function is used to add one piece of data to another.
- It is also called as ADD.
- Subtraction
- This function is used to subtract one piece of data from another.
- It is also called as SUB.
- Multiplication
- This function is used to multiply one piece of data by another.
- It is also called as MUL.
- Division
- This function is used to divide one piece of data from another.
- It is also called as DIV.
MOV instruction:
- Move (MOV) instruction is used to copy the data of the source register into destination register.
- Here, the contents of the source register will not be altered.
- In other words, it is used to copy the value in one word or register to another word or register.
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.
- Destination
- Destination refers to the address where the results of the instruction are stored.
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Write the machine code of the instruction:
subwf Ox53, 1
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Each instruction in this situation is given its own data, separate from the data used by any other instructions. To do this, we use a: A Multiple Input/Output B Data or Instruction Repeatedly C Distinct Information Difficulty Level: Single Inst, Single Inst, Multiple
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?=R index=DCE8
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Chapter 11 Solutions
Programmable Logic Controllers
Ch. 11 - Explain the function of math instructions as...Ch. 11 - Prob. 2RQCh. 11 - What standard format is used for PLC math...Ch. 11 - Prob. 4RQCh. 11 - Prob. 5RQCh. 11 - Prob. 6RQCh. 11 - Prob. 7RQCh. 11 - Prob. 8RQCh. 11 - Prob. 9RQCh. 11 - Prob. 10RQ
Ch. 11 - With reference to the instruction of Figure 11-34,...Ch. 11 - With reference to the instruction of Figure 11-35,...Ch. 11 - Prob. 1PCh. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - With reference to math instruction program shown...Ch. 11 - With reference to the math instruction program...Ch. 11 - Prob. 11PCh. 11 - Prob. 12P
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