Structured Text example. Source: drivesandsystems.com This deprecation ... Explaining the principal differences among the graphical PLC programming languages, Yerger started with Ladder Diagram, ...

and Structured Text (ST). In this paper, we describe a typical control Logic application for demonstration of configuring a PLC, writing application program and code generation along with run-time ...

While I believe ladder logic is the optimal programming language for the PLC, there are at least two other methods of which the reader should be aware: Functional Block Diagram and Structured Text ...