Structured Programming - Siemens CPU 948 Programming Manual

Ladder diagram
Programming with
graphic symbols
like a circuit diagram
complies with
DIN 19239
LAD
Fig. 2-1 Methods of representation in the STEP 5 programming language
Graphic representation of
sequential controls
2.1.2

Structured Programming

CPU 948 Programming Guide
C79000-G8576-C848-04
Statement list
Programming with
mnemonic abbreviations
of function designations
complies with
DIN 19239
STL
A I
AN
I
A I
I
ON
O I
= Q
GRAPH 5 /4/ is a programming language for graphic representation of
sequential controls. It is at a higher level than the LAD, CSF, STL
methods of representation. A program written in GRAPH 5 as a
graphic representation is automatically converted to a STEP 5
program by the PG.
Using STEP 5, you can structure your program by dividing it into
self-contained program sections (blocks). This division of your
program clarifies the essential program structures making it easy to
recognize the system parts that are related within the software.
STEP 5 Programming Language
Control system flowchart
Programming with
graphic symbols
complies with
IEC 117-15
DIN 40700
DIN 40719
DIN 19239
CSF
&
> = 1
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