<8. Detailed Description>
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8.4 Criteria for Selecting Programming
Languages in Logic Designer
This section describes the criteria for selecting programming languages to be used
in Logic Designer.
8.4.1 Selection Criteria for FBD, LD and ST
Graphical languages FBD and LD, and text-based language ST differ greatly in their
representation and coding of applications but can all be used to create a given
application.
Programming language selection is often decided by personal discretion based on
an engineer’s knowledge, experience and competency in specific languages rather
than a well-defined, standard set of programming language selection criteria.
Nevertheless, the same application, coded in different languages, results in different
levels of coding complexity and ease of understanding.
Given an application, a suitable programming language should be selected not just
based on personal discretion but also consideration of its language characteristics.
● Representation Differences between Languages
For purpose of comparison, sample applications are used below to illustrate how the
same application is represented differently when coded in three different languages,
namely, FBD, LD and ST.
FBD and LD, both being graphical languages, may have the same representation for
some applications.
Summary of Contents for STARDOM FCN-500
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