For several lessons now, we have been discussing different options for modifying input and output values during CPU scan cycles. In this lesson, we are going to show you how to modify the values of Timers, Counters, and memory bits. We will demonstrate why timer and counter values should use the “modify once” selection in order for the modification to function as intended. We also indicate which trigger option to use for which scenario when modifying memory bits. Let’s continue learning about value modification by starting this lesson.