Siemens SIMATIC PCS 7 System Manual page 133

User archive structure
The structure (number and format of columns) of a runtime archive consists of a fixed columns
component (e.g., name and ID) and a variable component. The variable column component
depends on the configuration with the relevant engineering tool. For every attribute / parameter
generated, a column in the correct format (integer, string, etc.) is created in the runtime archive
and a row in the corresponding configuration archive (FB_yyyATTRIB_xxx or
FB_yyyVALUE_xxx). For example, the runtime archive FB_MATERIAL_001, which contains
materials of materials class 1, is firmly assigned to configuration archive FB_MATATTRIB_001,
which saves more detailed information (row by row) on the corresponding column in the runtime
archive.
This detailed information is used during runtime by the APF OS pictures and during AS / OS
communication with FB_UA_RM or FB_UA_WM.
The AS function block is also created using the configuration archive.
If these two archives do not match, problems may occur during runtime. We therefore strongly
advise you not to manipulate attributes manually. Attributes should only be modified using the
corresponding engineering tool, which correctly adapts both of the archives affected.
Typical error messages / errors in this procedure are as follows:
● Length errors reading a data record from the AS function block indicate that the structure
of the runtime archive does not correspond to the AS function block or does not correspond
to the configuration archive.
● When data appear in the wrong position on the runtime screen or are saved at the wrong
position in the runtime archive, this is also an indication that the runtime archive, block and
corresponding configuration archive are not consistent.
Advanced Process Functions Engineering Manual
System Manual, 07/2016, A5E38719921-AA
Diagnostics guide
10.1 Troubleshooting procedure
133