Communication Protocol
Richard A. Panke · River Publishers eBooks · 2020
Almost all commercially available energy management systems (EMSs) use a proprietary communication protocol, therefore it is possible to mix products made by different manufacturers to form an integrated EMS. However as pressure from the building owners community increased to focus-on and solve this problem, some manufacturers are beginning to standardize. A formal hierarchical identification of all data communications network functions has been established by the International Standards Organization and referred to as the Open Systems Interconnection (OSI) Model for OSI. Realization of the ideal LAN would require all levels of functions included in the OSI standard; however, not all levels of the OSI standard need to be implemented to provide effective communications in an LAN. Standards as basic as the OSI seven-layer communications standard were developed by individuals working in the industry and became official standards only after they had already been adopted as defacto standards.