Step 5 Operations; Basic Operations - Siemens SIMATIC S5-90U System Manual

S5-90U/S5-95U
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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.
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.
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 6115-02b
Except for the addition (+F), subtraction (-F), and organizational ope-

STEP 5 Operations

Only an experienced programmer
8-1