Siemens Sinumerik 840D sl Function Manual page 195

05.07
 Workpiece ID
The DlgWpdMark parameter specifies the workpiece ID in the dialog program.
Combined axis/numeric IDs (e.g. DlgWpdMark=W Z888) can also be used for
controllers that cannot edit all characters.
Extract from the machine configuration file:
DlgWpdMark=WPD

File type ID
The File Type ID parameter specifies the file type ID in the dialog program.
Combined axis/numeric IDs (e.g. Y002) can also be used for controllers that
cannot edit all characters. The character is declared in the
DlgExchangeCNCType parameter. The numeric part of the ID refers to the
sequence of file types in the DNCDATATYPE database table, starting with
001; increment = 1.
Extract from machine configuration file:
DlgExchangeCNCType=Y

Wildcard alternative
The Wildcard Alternative parameter specifies the wildcard alternative for
controllers, which cannot edit *, in the dialog program. The parameter for list
requests (e.g. to request lists of all the data types or file names) is important
here.
Extract from the machine configuration file:
DlgExchangeWildcard=X999
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Motion Control Information System DNC (FBDN) - 04/10 Edition
DNC Plant/DNC Cell (FBDN1)
10 Configuration
FBDN1/10-187