Chapter 11, Problem 10RQ

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 program based on the type of processor used.
• The data manipulation instructions are almost similar to math instructions.
• The math instruction allows the Programmable Logic Controller (PLC) to take more of conventional computer qualities.
• Math instructions are normally used to perform arithmetic functions on the values stored in memory words or registers.

Clear instruction:

• The clear instruction is used to set or reset all the bits of the word in the destination to zero.
• It is denoted as CLR.

Destination:

• Destination refers to the address where the results of the instruction are stored.
• For example, if 1+1=2; then the value 2 is automatically stored in the destination address location.