Siemens SINUMERIK 840D sl Programming Manual page 45

Note
Restrictions affecting APR
The following restrictions need to be borne in mind when using APR:
• A restriction on the access rights for reading system and user variables in part
• A restriction on the access rights for reading system and user variables via the OPI using
Setting access rights using ACCESS files
When using ACCESS files to assign access rights, redefinitions of access rights for system
data, user data, and NC language commands may only continue to be programmed in these
ACCESS files. Global user data (GUD) is an exception. For this data, access rights have to
continue to be redefined (if this appears necessary) in the corresponding definition files.
For continuous access protection, the machine data for the execution rights and the access
protection for the corresponding directories have to be modified consistently.
In principle, the procedure is as follows:
● Creation of the necessary definition files:
● Setting of the write right for the definition files to the value required for redefinition:
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
programs/cycles with APR 0 to 7 has no effect.
APR 10 to 17 is only taken into account in the case of access from the HMI. Access from
other components (PLC, external computers, EPS services, etc.) is not restricted.
– _N_DEF_DIR/_N_SACCESS_DEF
– _N_DEF_DIR/_N_MACCESS_DEF
– _N_DEF_DIR/_N_UACCESS_DEF
– MD11170 $MN_ACCESS_WRITE_SACCESS
– MD11171 $MN_ACCESS_WRITE_MACCESS
– MD11172 $MN_ACCESS_WRITE_UACCESS
Flexible NC programming
1.1 Variables
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