Chapter 11, Problem 8P

Program Plan Intro

a.

Count-Up (CTU) Counter:

• The CTU counter refers to an up counter
• This counter is used to count an event that occurs logically or externally and places that value in the counter’s accumulator.
• The accumulated value can even be maintained during false rung conditions and can be reset back to 0 using reset instruction.

Addition math function:

• Math instructions refer to all output instructions that uses the data of two words or registers and perform the desired function.
• Addition function is used to add one piece of data to another.
• It is also called as ADD.

Program Plan Intro

b.

Count-Up (CTU) Counter:

• The CTU counter refers to an up counter
• This counter is used to count an event that occurs logically or externally and places that value in the counter’s accumulator.
• The accumulated value can even be maintained during false rung conditions and can be reset back to 0 using reset instruction.

Addition math function:

• Math instructions refer to all output instructions that uses the data of two words or registers and perform the desired function.
• Addition function is used to add one piece of data to another.
• It is also called as ADD.

Timer ON Delay (TON):

• TON refers to an on-delay timer.
• The on-delay timer is the most commonly used timer.
• TON counts the time-based intervals as soon as the instruction becomes true.
• Here, the output changes its state from low to high when the timer provides some time delay (instruction goes from OFF to ON state).

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.