Introduction to STEP 5 S5-100U
Each method of representation has its own special characteristics. A program block that has been
programmed in STL cannot necessarily be output in CSF or LAD. The three methods of graphic re-
presentation are not compatible. However, programs in CSF or LAD can always be converted to
STL. Figure 7-1 illustrates these points in a diagram.
Figure 7-1. Compatibility of STEP 5 Methods of Representation
STL
CSF LAD
The STEP 5 programming language has the following three operation types:
• Basic
• Supplementary
• System
Table 7-1 provides further information about these operations.
Table 7-1. Comparison of Operation Types
STEP 5 PROGRAMMING LANGUAGE
Basic Operations
Supplementary
Operations
System Operations
Application In all blocks Only in function blocks Only in function blocks
Methods of
representation
STL, CSF, LAD STL STL
Special features
For users with good
system knowledge
Refer to Chapter 8 for a description of all operations and for programming examples.
7-2
EWA 4NEB 812 6120-02
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