Siemens Sinumerik 840D sl Function Manual page 92

DNC Plant/DNC Cell (FBDN1)
4 NC data management
Editing NC data
Depending on the configuration, modified NC data can be stored as follows:

Unchanged versions and identifiers

If the next available version is assigned, this is assigned the identifiers for the
edited version.
Importing NC data manually
The following applies depending on whether the NC data is imported with or
without header data:

Without header:
If NC data with the same name, type and version exists, the next available
version will be assigned.

With header:

If a version that already exists is specified in the header for NC data of the
same name and type, the permission of the operator must be obtained via
an acknowledgement dialog for transferring the data.

If no version number has been specified in the header for the NC data of
the same name and type, the next available number will be assigned.
Uploading NC data
When you upload NC data, versions are assigned on the basis of the configured
version strategy.
You can choose one of six strategies (see also: Section 10.7.2 Version strategy for
upload).
Inserting NC data
If NC data is integrated by means of a cut/paste or copy/paste procedure, the next
available version will be assigned if NC data of the same name, type, and version
already exists.
FBDN1/4-84
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Motion Control Information System DNC (FBDN) - 04/10 Edition
05.07