System Environment
We mentioned several times in this book that OPC UA is designed in a generic manner and can therefore be applied in a diverse range of applications running at various locations within an organization's network. Figure 9.1 shows an example of an environment in which OPC UA is used in various ways. In this scenario, OPC UA servers are running on controllers of the Control Network, on Batch systems in the Operations Network, and are applied for MES application as a part of the production planning. Furthermore, an ERP system uses an OPC UA client as an interface for consuming services in the Corporate Network. In addition, there are not only different applications involved but also different platforms. The controllers require real-time operating systems, the Batch systems as well as the MES might be Windows-based and the ERP system might be deployed on UNIX platforms. Besides the possibility to run OPC UA on different platforms, it can also be used for applying different architectural concepts at system level. In our example, several architectural concepts can be identified such as redundancy (Batch servers), server-chaining (MES and Batch), or server aggregation (Batch and OPC UA servers running on the controllers ).
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Notes
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The U.S. Food and Drug Administration (FDA) define requirements for companies developing applications for the consumer industry in the United States
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Port 4840.
- 3.
Forensic in the context of security means gathering information that help to identify the reason why a certain security incident occurred (e.g., a hacker that intruded into a system). A typical activity is thereby exploring different log files to detect strange behaviors or anomalies.
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© 2009 Springer-Verlag Berlin Heidelberg
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Mahnke, W., Leitner, SH. (2009). System Architecture. In: OPC Unified Architecture. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-68899-0_9
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