ISPSoft User Manual 13.1 Introducing Structured Texts A structured text is a high level language that is syntactically resembles C or Pascal. It is composed of text. Compared with instruction lists, structured texts are more readable. A structured text is very flexible and intuitive for writing control algorithms. People who are trained in programming languages often find it the easiest language to use for programming control logic. Besides, structured texts provide a familiar programming environment for programmers who are familiar with the C language. 13.1.1 Basic Structure of a Structured Texts The structured text shown below is a basic structured text.
It has the same function as the ladder diagram under it. The structure of the structured text is similar to the syntax of human language. A structured text is composed of statements. The structure of the structured text above is shown below. * In a structured text, “ : ＝ ” means “to assign”, and “ ＝ ” means “to be equal to”. 13-2