
07/2011 2 Operating A&D DataManagement
2.4 Specifying the properties of the control components
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SIMATIC A&D DataManagement Client - 07/2011
2-49
Creating a reference to an S7 project
ADDM loads the data from a stated S7 project into the S7-CPU. A back transfer
into the S7 project is blocked to prevent the source data being inadvertently
overwritten.
ADDM requires a reference to the relevant S7 project in order to transfer the data.
1. To do this, select the S7 project in the Open dialog of the S7 browser.
2. Assign the storage path of the corresponding source project with the
"Browse” button.
3. The reference is stored in ADDM by selecting a ”Block” object in the right-
hand area of the display.
The browser is then closed automatically.
S7 source data
Source data maintenance is traced in S7 projects. This has the advantage that not
only the PLC programs are kept in the S7 projects but also the higher-level data for
the PLC. This includes, for example, variable tables and structures, connection
data between CPUs via MPI, PROFIBUS or Industrial Ethernet etc. Every CPU can
thus be accessed with a programming device, irrespective of the chosen
connection in a networked system. However, this requires source data
maintenance in the S7 project. The higher-level data is not stored on the CPU.
Back loading the CPU data into the project would lead to a loss of information.
Therefore it is impossible to back load into the S7 project with ADDM.
S7-backup
Nevertheless, in various applications, there is a need to back up the data contained
in the S7 CPU. This includes data generated by controller modules, or recipes
optimized by an operator during the work. It is possible to define an S7 backup so
that this data can be backed up despite the source data concept.
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