Technical data

Programming with STEP 7
Manual, 05/2010, A5E02789666-01 277
12 Parameter Assignment for Data Blocks
The function "Parameter Assignment for Data Blocks" allows you to do the following outside the
LAD/STL/FBD program editor:
• Edit and download the actual values of instance data blocks to the PLC, without having to load
the entire data block.
• Monitor instance data blocks online.
• Use the "S7_techparam" system attribute (Technological Functions) to easily assign
parameters to instance data blocks and multiple instances and monitor them online.
Procedure:
1. In the SIMATIC Manager, double-click the instance data block to open it.
2. Answer the prompt asking if you want to open the function "Parameter Assignment for Data
Blocks" with "Yes". Result: the instance DB is opened in the "Parameter Assignment for Data
Blocks" application.
3. Choose the view in which the data block should be displayed by selecting the menu command
View > Data View or View > Declaration View.In the case of instance data blocks or multiple
instances with the "S7_techparam" system attribute, the "technological parameters" view is
automatically opened.
4. Edit the instance date block as needed. Any pertinent information, warnings or errors will be
displayed in the message window. To go to the location of a warning or error, double-click on
the corresponding warning or error.
5. Download the changed actual value from the programming device (PG) to the CPU that you
have assigned to the current S7 program (menu command PLC > Download Parameter
Setting Data).
6. Select the menu command Debug > Monitor to display the program status for the opened
blocks and then monitor the editing of the loaded actual values online.
Note
You can recognize data blocks that have the "S7_techparam" system. To determine whether a block
has this system attribute, go to the SIMATIC Manager and select the block. Then select the menu
command Edit > Object Properties and open the "Attributes" tab.