Siemens SINUMERIK 840DE sl Commissioning Manual page 952

Functionality
5.2 Address space model
5.2 Address space model
Address space model
If the OPC UA server is browsed, the available address space is mapped under the "Sinumerik"
node.
Global User Data (GUD) can be found under the "/Sinumerik/GUD" node.
The PLC blocks (inputs, outputs, bit memory, data blocks) can be found under the "/Sinumerik/
Plc" node.
Machine data can be found under the node "/Sinumerik/TEA".
Setting data can be found under the node "/Sinumerik/SEA".
Observe the following during browsing:
● In the address space of the NC, the displayed variables always represent only the first
parameter of the corresponding first OPI 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, then you must
correspondingly extend the identifier; you cannot directly accept the identifiers obtained
when browsing, e.g. "/Channel/Parameter/R[u2, 56]".
● In the address space of the NC, the displayed variables represent the access format that
has to be extended accordingly.
Example:
The variable "/Plc/MB" is in the address space. This variable must be extended by the
appropriate byte number, e.g. "/Plc/MB6". Only then is a value supplied.
● The address space of the NC also contains variables that are not available in a
corresponding machine configuration. These variables return "BadAttributeIdInvalid" as
value.
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SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Configuration Manual, 12/2017, 6FC5397-1DP40-6BA1