Siemens SINUMERIK 840D sl Programming Manual page 144

File and Program Management
3.4 Protection levels for user data, MD, SD and NC commands
Description
Like for the GUD definitions, separate definition files exist that are evaluated on control start-
up:
End user: /_N_DEF_DIR/_N_UACCESS_DEF
Manufacturer: /_N_DEF_DIR/_N_MACCESS_DEF
Siemens: /_N_DEF_DIR/_N_SACCESS_DEF
Subroutine call in definition files
It is possible to call subroutines containing REDEF statements from the above definition files.
The REDEF statements must always be at the beginning of the data part just like the DEF
statements. The subroutines must have the extension SPF or MPF and inherit the write-
protection of the definition files set with $MN_ACCESS_WRITE_xACCESS.
Note
Extension of the REDEF command
As soon as the "Protection levels for NC commands" function is active, the redefinitions for
the machine data/setting data created in GUD definition files must be stored in the new
definition files for protection level assignments, i.e. the setting of protection levels for
machine and setting data is permitted only in the previously mentioned protection level
definition files and rejected in the GUD definition files with the alarm 15420.
Note
Setting the initialization attributes and synchronization attributes is still only possible in the
GUD definition files.
Protection levels for system variables
Protection levels for system variables only apply to the value assignments via parts program
command. On the user interface, the protection level concept of the HMI
Advanced/Embedded applies.
For further information about the "protection level concept", please refer to:
/BAD/, HMI Operator's Guide, in the "Keyswitch" and "Machine Data" section
/IAD/, Installation and Start-Up Guide, "Setting Parameters for Control Unit"
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Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
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