Siemens SINUMERIK 840Dsl Configuration Manual page 36

Functionality
5.2 Address space model
Observe the following while browsing:
● In the address space of the NC, the displayed variables always represent only the first
parameter of the corresponding unit.
Example:
The R parameters can be found under "Sinumerik > Channel > Parameter > R". The
corresponding identifier is called "/Channel/Parameter/R", which is finally mapped to "/
Channel/Parameter/R[u1, 1]". If you want to access other parameters, you need to specify
the corresponding index in brackets, e. g. "/Channel/Parameter/R[u2,56]".
● In the address space of the PLC, the displayed variables represent the access format that
has to be extended accordingly.
Example:
The variable "/Plc/MB" is in the address space and is mapped to "/Plc/MB0". For accessing
further bytes this variable must be extended by the appropriate byte number, e.g. "/Plc/
MB6".
● The address space of the NC also contains variables that are not available in a
corresponding machine configuration. These variables return "BadAttributeIdInvalid" as
value.
36
SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Configuration Manual, 04/2018, 6FC5397-1DP41-0BA0