Step 5 Operations - Siemens SIMATIC S5-100U System Manual

S5-100U
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STEP 5 Operations

The STEP 5 programming language has the following three operation types:
• Basic Operations include functions that can be executed in organization, program, sequence,
and function blocks. Except for the addition (+F), subtraction (-F), and organizational ope-
rations, the basic operations can be input and output in the statement list (STL), control system
flowchart (CSF), or ladder diagram (LAD) methods of representation.
• Supplementary Operations include complex functions such as substitution statements, test
functions, and shift and conversion operations. They can be input and output in STL form only.
• System Operations access the operating system directly. Only an experienced programmer
should use them. System operations can be input and output in STL form only.
8.1 Basic Operations
Sections 8.1.1 through 8.1.9 use examples to describe the basic operations.
EWA 4NEB 812 6120-02b
STEP 5 Operations
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