Siemens Sinumerik 840D sl Function Manual page 191

05.07

End receive after last character
This is the time interval in seconds after which transmission is terminated if no
further characters are received. Values between 1 and 600 can be entered.
Monitoring is not carried out if 0 is entered. Data receipt is terminated by
means of the end-of-transmission character only.
Extract from machine configuration file:
TimeOut=10

Ignore ZERO values
This parameter specifies whether binary zero values within the file to be
transmitted are to be discarded.
Extract from machine configuration file:
NullDiscard=1

Test mode
When the test mode is activated (TestMode=1), the temporary files in the
parameterizable temporary directory (default: ...DNC\Tmp) are not deleted.
This enables data that has been sent and received to be compared.
Extract from machine configuration file:
TestMode=0
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Motion Control Information System DNC (FBDN) - 04/10 Edition
DNC Plant/DNC Cell (FBDN1)
10 Configuration
FBDN1/10-183