Technical data

Basics of Creating Logic Blocks
10.7 Editing STL Statements in the Code Section
Programming with STEP 7
262 Manual, 05/2010, A5E02789666-01
10.7 Editing STL Statements in the Code Section
10.7.1 Settings for Statement List Programming
Setting the Mnemonics
You can choose between two sets of mnemonics:
• German
• English.
You set the mnemonics in the SIMATIC Manager with the menu command Options > Customize
in the "Language" tab before opening a block. While editing a block you cannot change the
mnemonics.
You edit the block properties in their own dialog box.
In the editor you can have a number of blocks open and edit them alternately as required.
10.7.2 Rules for Entering STL Statements
You will find a description of the Statement List programming language representation in the
"Statement List for S7-300/400 - Programming Blocks" manual or in the STL online help (Language
Descriptions).
When you enter statements in STL in incremental input mode, you must observe the following
basic guidelines:
• The order in which you program your blocks is important. Called blocks must be programmed
before calling blocks.
• A statement is made up of a label (optional), instruction, address, and comment (optional).
Example: M001: A I 1.0 //Comment
• Every statement has its own line.
• You can enter up to 999 networks in a block.
• Each network can have up to approximately 2000 lines. If you zoom in or out, you can enter
more or fewer lines accordingly.
• When entering instructions or absolute addresses, there is no distinction made between lower
and upper case.