Learning RSLogix 5000 Programming

Chapter 5. Writing Ladder Logic

In this chapter, we will look at the history of ladder logic and the development of the IEC standard programming languages. Then, we will jump into the ladder logic programming by creating a simple pump control program. We will demonstrate how to buffer inputs and outputs in our ladder logic code and discuss the importance of this process. Finally, we will explore the new program parameter features in Logix Designer Version 24 and how that can be used to buffer values and greatly reduce the amount of ladder logic required for a program.

Ladder logic overview

Ladder logic was originally a written method for capturing the wiring of relay circuits also known as relay logic. The name ladder logic can be attributed to ...