Siemens SIMATIC ET 200AL, System Manual

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OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
Communication
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Function Manual, 05/2021, A5E03735815-AJ
Additional information on SiOME is available here
( https://support.industry.siemens.com/cs/ww/en/view/109755133 ).
– When companion specifications refer to type definitions in dependent specifications,
use the reference namespaces for this. You import reference namespaces as you would
the actual companion specifications.
See Creating a server interface for companion specification (Page 253).
– If you want to make instance data from FBs or UDTs of the CPU accessible to OPC UA
clients, you can have these instance data assignments automatically made as of TIA
Portal version V17. You only need to map the FB types or the UDTs to suitable OPC UA
data types of an imported reference namespace. For this mapping to be possible,
enable the option "Generate OPC UA nodes based on the local data mapping" in the
dialog for creating an OPC UA server interface of the type companion
specification/reference namespace.
See Generating OPC UA nodes based on local data mappings of FB types and UDTs
(Page 273)
• User-defined server interface:
For this type of server interface you combine OPC UA nodes of an OPC UA server into a
unit.
To do this, use the specifications for your project or the requirements for your machine or
your plant as a basis.
Additional information on the user-defined server interface is available here (Page 259).
Injection molding machine as an example for companion specification
In this example, a server interface contains the following elements:
•
OPC UA nodes which you can write with an OPC UA client to receive information about
this injection molding machine (in readable PLC tags)
• OPC UA nodes which you can write with an OPC UA client to transfer values to the
injection molding machine (in writable PLC tags)
• OPC UA nodes which you can call with an OPC UA client to start functions of the injection
molding machine (via server methods)
This server interface enables a default view of a CPU, which can be used to control an
injection molding machine.
For injection molding machines, the companion specifications "OPC UA specifications for
plastics and rubber machines" (previously "Euromap") define a whole series of OPC UA nodes
which you can apply as a server interface.
Other OPC UA nodes of the CPU are not included in this server interface. This provides a
better overview.