Technical data

Displaying Reference Data
14.1 Overview of the Available Reference Data
Programming with STEP 7
316 Manual, 05/2010, A5E02789666-01
14.1.4 Unused Symbols
You are shown an overview of all the symbols with the following characteristics:
• The symbols defined in the symbol table.
• The symbols not used in the parts of the user program for which reference data exist.
They are displayed in an active window. The working window's title bar shows the name of the user
program to which the list belongs.
Every line shown in the window corresponds to a list entry. A line consists of address, symbol, data
type, and comment.
Column Content/Meaning
Address Absolute address
Data Type Data type of the address
Comment Comment on the address from the symbol table
Example of List of Unused Symbols Layout
Symbol Address Data Type Comment
MCB1 I 103.6 BOOL Motor circuit breaker 1
MCB2 I 120.5 BOOL Motor circuit breaker 2
MCB3 I 121.3 BOOL Motor circuit breaker 3
You can sort the entries by clicking the column title.
You can also remove symbols that are no longer needed from the list. To do this, select symbols in
the list and then execute the "Delete symbols" function.