Siemens SINUMERIK 840D sl Programming Manual page 415

Access rights in relation to OPI (APRB, APWB)
The access rights (APRB, APWB) restrict access to system and user variables via the OPI
equally for all system components (HMI, PLC, external computers, EPS services, etc.).
Note
Local HMI access rights
When changing access rights to system data, care must be taken to ensure that such changes
are consistent with the access rights defined using HMI mechanisms.
APR/APW access attributes
For compatibility reasons, attributes APR and APW are implicitly mapped to the attributes
APRP / APRB and APWP / APWB:
● APR x ⇒ APRP x APRB x
● APW y ⇒ APWP y APWB y
Access rights using ACCESS files
When using ACCESS files to assign access rights, access rights for system data, user data,
and NC language commands must only be redefined in ACCESS files. Global user data (GUD)
is an exception. For this data, access rights still have to be redefined in the corresponding
definition files *_DEF.
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:
1. Creation of the necessary definition files:
– _N_DEF_DIR/_N_SACCESS_DEF
– _N_DEF_DIR/_N_MACCESS_DEF
– _N_DEF_DIR/_N_UACCESS_DEF
2. Setting of the write right for the definition files to the value required for redefinition:
– MD11170 $MN_ACCESS_WRITE_SACCESS = <protection level>
– MD11171 $MN_ACCESS_WRITE_MACCESS = <protection level>
– MD11172 $MN_ACCESS_WRITE_UACCESS = <protection level>
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Work preparation
3.1 Flexible NC programming
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