File and Program Management
3.4 Protection levels for user data, MD, SD and NC commands
Job planning
3-12 Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
3.4 3.4 Protection levels for user data, MD, SD and NC commands
3.4.1 Defining protection levels for user data (GUD)
Function
Access criteria can be defined for GUD modules to protect them against manipulation. In
cycles GUD variables can be queried that are protected in this way from change via the HMI
user interface or from the program. The access protection applies to all variables defined in
this module. When an attempt is made to access protected data, the control outputs an
appropriate alarm.
Programming
Protection levels for the whole module are specified in the headers.
%_N_MGUD_DEF ;module type
;$PATH=/_N_DEF_DIR ;path
APR value APW n ;protection levels in separate line
The access protection level is programmed with the desired protection level in the GUD
module before any variable is defined. Vocabulary words must be programmed in a separate
block.
Parameters
Protection level:
APW n
APR n
Access protection (Access Protection)
for writing (Write)
for reading (Read)
n Protection level n
from 0 or 10 (highest level)
to 7 or 17 (lowest level)
Meaning of the protection levels n:
0 or 10
1 or 11
2 or 12
3 or 13
4 or 14
...
7 or 17
SIEMENS
OEM_HIGH
OEM_LOW
End user
Keyswitch 3
...
Keyswitch 0
APW 0-7, APR 0-7
The read and write protection acts on the
user interface and in the NC program or in
the MDA operation.
APW 10-17, APR 10-17:
The read and write protection acts here on
the user interface.
These values are permissible in GUD
modules and in protection levels for
individual variables in the REDEF
instruction.
This values are only permissible for
module-specific GUD protection level.
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