Technical data

Defining Symbols
8.5 Symbol Table for Shared Symbols
Programming with STEP 7
200 Manual, 05/2010, A5E02789666-01
Tracking Changes:
In the SIMATIC Manager, select the block folder and then select the menu command Edit > Check
Block Consistency. The "Check block consistency' function make the changes necessary in the
individual blocks.
8.5 Symbol Table for Shared Symbols
Shared symbols are defined in the symbol table.
An (empty) symbol table ("Symbols" object) is created automatically when you create an S7 or M7
program.
Validity
The symbol table is only valid for the module to which you link the program. If you want to use the
same symbols in a number of different CPUs, you yourself must ensure that the entries in the
various symbol tables all match up (for example, by copying the table).
8.5.1 Structure and Components of the Symbol Table
Structure of the Symbol Table