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The typical control system network architecture, such as an HVAC control system, consists of several network levels:
The top level of an HVAC control system is typically the building management system (BMS). The BMS is an operator administration workstation that can communicate with, interrogate, and control any of the controllers and devices on the network. A BMS monitors, supervises, controls, and reports on building control systems. These systems may include access control, video surveillance, fire alarm, HVAC control, programmable lighting, and electric power management. Its basic functions are:
These systems typically display the following responses to an operator's workstation:
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Image and content courtesy of Whole Building Design Guide – National Institute of Building Sciences |