Technical data

Creating Blocks and Libraries
9.2 Selecting the Programming Language
Programming with STEP 7
220 Manual, 05/2010, A5E02789666-01
9.2.3 Statement List Programming Language (STL)
The programming language STL is a text-based programming language with a structure similar to
machine code. Each statement represents a program processing operation of the CPU. Multiple
statements can be linked to form networks.
Example of Networks in Statement List
The programming language STL is supplied with the standard STEP 7 software package. With this
programming language, you can use incremental editors to edit S7 blocks and you can create and
compile STL program source files in a source code editor to generate blocks.