Networking and Integration of Facilities Automation Systems by Viktor Boed

By Viktor Boed

Amenities more and more depend upon automated platforms to optimize their structures' platforms operation and decrease the prices of upkeep and administration. accordingly, facility managers and engineers needs to upward push to the problem of a brand new discipline-systems networking and integration-as a growing number of automated platforms develop into applied.

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Control systems and their interfaces are antiquated at a much faster rate. Interfacing older DDC systems to a more modern communication system or to other DDC systems of the present generation can be costly or impossible. This is usually the case at the end of the control system’s useful life cycle. Such systems should be retrofitted by newer systems, which assure interoperability over the facilities network. System retrofits can be coordinated with retrofit of the mechanical systems they control, which is usually easier to justify, due to resulting energy or maintenance cost savings.

The layer provides error recovery (for example, by requesting retransmission of incomplete or unreliable data). The transport layer is concerned with getting the data to an intended address. It enhances the reliability of the network layer by focusing on getting the data reliably to the other computer’s or node’s transport layer, or saving it in case of communication failure. There are four (4) so-called integrity classes guiding error checking and error recovery: the lowest (Class 0) provides very little error checking, while the highest (Class 4) provides extensive error checking and recovery.

The bus is a parallel communication system, failure of a single node will not affect the other nodes connected to the network. 10). This was a common topology of centralized computing; terminals or computers were connected to the central computer in a star configuration. Telephone private branch exchanges (PBXs) utilize star configuration with a central switch connecting all nodes of the network. Reliability of a star topology is reduced by a “bottleneck” — the hub, a single point through which connected nodes communicate with each other.

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