Siemens Sinumerik 840D sl Function Manual page 324

DNC IFC SINUMERIK - Downloading NC Data via a Network (FBDN2)
5 Configuration file
Pseudo workpiece
A pseudo workpiece is an organizational unit that is required, in particular, during
automatic archiving, in order to draw conclusions about the source directory of a
file.
Activation or deactivation of the Pseudo workpiece checkbox specifies whether
the NC data is to be stored in a pseudo workpiece in DNC.
!
Important
The Pseudo workpiece checkbox may not be activated for WKS.DIR!
Extract from the configuration file:
Section [DHDIR]
DHDIR1 =MPF.DIR;0
DHDIR2 = SPF.DIR;0
...
Note on the DNC_IFC.INI configuration file
In the configuration file, the digit (0 or 1) behind the directory name specifies
whether the NC data is to be stored in a pseudo workpiece.
0 = No pseudo workpiece
1 = Store NC data in pseudo workpiece
Only 0 is permitted for WKS.DIR! (WKS.DIR is already a workpiece!)
FBDN2/5-42
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Motion Control Information System DNC (FBDN) - 04/10 Edition
05.07