Siemens Sinumerik 840D sl Function Manual page 199

05.07
Data interpretation for SINUMERIK*
Data that is received serially from a SINUMERIK*/802D/840C always contains
information on the storage location and the file names in the data management
system on the controller. When this data is received, the NC program name and file
type are determined in DNC from the information for interpreting the data flow. The
syntax is specified by the SINUMERIK*. If these files originate from a workpiece
directory on the controller, this information is evaluated too and an appropriate
workpiece is created or the NC program files are stored in a workpiece directory,
which may already exist, with the same name.
Note
All of the control lines are always interpreted. If necessary, the data is divided up
among several files.
!
Important
The number of significant lines must be less than the number of lines in the
shortest NC program.
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Motion Control Information System DNC (FBDN) - 04/10 Edition
DNC Plant/DNC Cell (FBDN1)
10 Configuration
FBDN1/10-191