Siemens Sinumerik 840D sl Function Manual page 198

DNC Plant/DNC Cell (FBDN1)
10 Configuration
Program start identification / program end identification
(NCProgramStart.../NCProgramEnd...)
Three strings can be defined in each case for the start and end, whereby any
combination of start and end strings is valid.
When the data is split, a distinction must be drawn between the following cases:
1. Only start identifiers defined
The data before the first start identifier is ignored. The data as of the start
identifier up to the next identifier is stored in the first file. Starting at the second
identification in the second file, etc., until the file end.
If no start identification is found, all the data will be discarded and a message
issued to the operator.
2. Only end identifiers are defined
From the start of the data up to and including the first end identifier, all the
data is stored in the first file. As of the next line, the data is stored in the next
file, up to the next end identifier and so on. The last block is also stored even if
no further end identifier is found. Likewise, all of the data is stored if the file
does not contain any end identifiers.
3. Start and end identifiers are defined
The data between an identified start and end string (including the lines in
which the identifier string was identified) is stored in each case in a separate
file. Data that occurs between these areas is ignored.
A search is always alternately made for a string type:
Initially, a search is only made for the start identifier string. If the start of the
program is found, only a search is then made for the end, that is, other start strings
are ignored. If the end identifier is found, a search then starts again for the start
string.
The data will be discarded if no start identifier is found. If the last end identifier is
missing, the data up until the end is stored.
FBDN1/10-190
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Motion Control Information System DNC (FBDN) - 04/10 Edition
05.07