The variety of technologies used in modern Building Automation Systems (BAS) calls for methods to support interoperability of the devices from different technologies and vendors. OLE for Process Control Unified Architecture (=OPC UA) provides the possibility to enable secure inter operability of devices with platform independence and efficient information model features. However, OPC has not found broad space in the world of building automation, yet. In this paper, results and experiences from a project are presented, where BACnet devices are mapped to OPC UA standard models. The values and controls are presented by the OPC UA server running on an embedded device. In this paper, we map the BACnet information models into the corresponding OPC UA information models. The actual data (in OPC UA form) of the BACnet devices can be accessed by connecting an OPC UA Clients to the OPC UA Server. This objective was be pursued by using as many available open-source projects as possible.
The communication technologies for automatic meter reading (smart metering) and for energy production, distribution and consumption networks (smart grid) have the potential to be one of the first really highly scaled cyberphysical applications. Due to the characteristics of the energy market, which is multi-"media", multi-utility, and multi-vendor on the different levels of the value chain, standards are of key importance to guarantee interoperability and seamless communication. For the European markets, the EN13757 M-Bus standard family has become the standard of choice. However, the standard family is very flexible and can be adapted to the various requirements. This paper shall give an overview on the existing variants. The recent and actual advances are described in more detail. All information is backed by the experience from a fully independent implementation of the EN131757-4 of the authors' team. 1
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