Detailed description
2.4 Starting up the PLC program
Basic logic functions: PLC Basic program powerline (P3 pl)
26 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.4.5 Data backup
The PLC-CPU does not save any symbolic names, but instead data type descriptions of the
block parameters:
• VAR_INPUT, VAR_OUTPUT, VAR_IN_OUT, VAR and
• the data types of the global data blocks.
Note
No sensible recompilation is possible without the related project for this machine. This
especially affects, for instance the function status of the block or the necessary changes
done in the PLC-CPU programs later. It is, therefore, necessary to keep a backup copy of
the STEP7 project located in the PLC CPU on the machine. This is a great help for the
service case and saves unnecessary consumption of time in restoring the original project.
If the STEP7 project exists and has been created according to the instructions given above,
then symbols can be processed in the PLCCPU on this machine. It may also be advisable to
store the machine source programs as AWL files in case they are required for any future
upgrade.
The source programs of all organization blocks and all instance data blocks should always
be available.
2.4.6 PLC series startup, PLC archives:
Generate series archive
Once the blocks have been loaded into the PLC CPU, a series archive can be generated via
the HMI operator interface for data backup on the machine. To ensure data consistency, this
backup must be created immediately after block loading when the PLC is in the Stop state. It
does not replace the SIMATIC project backup as the series archive saves binary data only,
and does not back up, e.g., symbolic information. In addition, no CPU DBs (SFC 22 DBs) or
SDBs generated in the CPU are saved.
In Toolbox 06.03.03 and STEP 7 V5.1 and higher, the PLC series archive can be generated
directly from the corresponding SIMATIC project.
To do this, select the "Options" → "Settings" menu item and the "Archive" tab in STEP 7. This
contains an entry "SINUMERIK (*.arc)", which must be selected to create a series startup
file. After selection of the archive, select the "File" → "Archive" menu item. The relevant
series archive will then be generated. If the project contains several programs, the program
path can be selected. A series archive is set up for the selected program path. All blocks
contained in the program path are incorporated into the archive, except for CPU-DBs (SFC
22 DBs).
The process of generating a series archive can be automated (comparable to the command
interface in STEP 7, V5.1 and higher). In generating this series archive, the command
interface is expanded.
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