Chapter 15.1, Problem 23RQ

Program Plan Intro

Array:

• An array is a tag type that holds multiple pieces of data as a block.
• In an array, each element should be of same data type such as BOOL, SINT, or INT.
• It resides in a neighboring block of the controller’s memory.
• Arrays are similar to tables of data. In an array, the data can be represented in 1, 2, or 3 dimensional arrays.
• One element represents a single tag within the array.

Example:

The example for a one-dimensional array is given below: Consider an array named “Sample” which of “INT” data type. Let the size of the array be 6.

Array representation

From the above representation,

• The tag name is “Sample”.
• The array can holds “6” integer values, which are represented by “Sample [0]” to “Sample [5]”.