Technical data

Defining Symbols
8.1 Absolute and Symbolic Addressing
Programming with STEP 7
194 Manual, 05/2010, A5E02789666-01
Support with Programming
In the programming languages Ladder Logic, Function Block Diagram, and Statement List you can
enter addresses, parameters, and block names as absolute addresses or as symbols.
Using the menu command View > Display > Symbolic Representation you can toggle between
the absolute and symbolic representation of addresses.
To make it easier to program using symbolic addresses you can display the absolute address and
the symbol comment that belongs with the symbol. You can activate this information using the
menu command View > Display > Symbol Information. This means that the line comment
following every STL statement contains more information. You cannot edit the display; you must
make any changes in the symbol table or the variable declaration table.
The following figure shows you the symbol information in STL.
When you print out a block, the current screen representation with statement comments or symbol
comments is printed.