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Programming concepts
6.9 Debugging and testing the program
You can sort the entries in the cross-reference. The cross-reference list provides an
overview of the use of memory addresses and tags within the user program.
● When creating and changing a program, you retain an overview of the operands, tags
and block calls you have used.
● From the cross-references, you can jump directly to the point of use of operands and
tags.
● During a program test or when troubleshooting, you are notified about which memory
location is being processed by which command in which block, which tag is being used in
which screen, and which block is called by which other block.
Table 6- 6
Column
Object
Quantity
Location
Property
as
Access
Address
Type
Path
200
Elements of the cross reference
Description
Name of the object that uses the lower-level objects or that is being used by the
lower-level objects
Number of uses
Each location of use, for example, network
Special properties of referenced objects, for example, the tag names in multi-instance
declarations
Shows additional information about the object, such as whether an instance DB is
used as template or as a multiple instance
Type of access, whether access to the operand is read access (R) and/or write
access (W)
Address of the operand
Information on the type and language used to create the object
Path of object in project tree
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
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