Technical data

Displaying Reference Data
14.1 Overview of the Available Reference Data
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 317
14.1.5 Addresses Without Symbols
When you display the list of addresses without symbols, you obtain a list of the elements which are
used in the S7 user program, but which are not defined in the symbol table. 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.
A line consists of the address and the number of times that the address is used in the user
program. The entries are sorted according to address.
Example:
Address Number
Q 2.5 4
I 23.6 3
M 34.1 20
You can also assign names to addresses without symbols. To do this, select addresses in the list
and then execute the "Edit symbols" function.
14.1.6 Displaying Block Information for LAD, FBD, and STL
Language relevant information for Ladder Logic, Function Block Diagram, and Statement List is
displayed in the cross-reference list and the program structure. This information consists of the
block language and details.
The "Program Structure" view only displays language relevant information if the filter is set to "Call
Structure" in the "Program Structure" tab and if respective options were selected.
Language relevant information in the "Cross References" can be shown or hidden via menu
command View > Filter.
• Activate the "Block language" and "Details" check box in the "Cross References" tab of the
"Filter" dialog box to display the block language information.
Language relevant information varies according to the programming language the block was
written in and is shown using abbreviations.
Language Network Statement Instruction
STL Nw Inst /
LAD Nw
FBD Nw
Nw and Inst specify in which network and in which statement the address is used (cross-reference
list) or the block is called (program structure).