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6-1 Overview of ST Programming
6-1-1 Advantages of ST Language
Machine control programs are becoming larger in size and more complicated. The
percentage of status control and interlock control that can be programmed easily in ladder
diagrams is decreasing. On the other hand, complex mathematical processing and data
storage that are difficult to program in ladder diagrams account for about 70% of an entire
program. The use of ST for this part makes programming easier and reduces program size.
6-1-2 ST Programs Including Constructs
Branch and loop statements such as “IF” and “FOR” can be used in ST programming, like
BASIC and C programming.
Programs including mathematical processing and control statements, which are difficult to
write in ladder diagrams, can be created easily.
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