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. 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. Multiplication This function is used to multiply one piece of data by another. It is also called as MUL.

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Chapter 11, Problem 12P

Program Plan Intro

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.

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.

Multiplication

This function is used to multiply one piece of data by another.

It is also called as MUL.

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