ABSTRACT
The concept of centralised supervisory control systems for buildings, known as: Building Automation Systems (BAS), Building Energy Management Systems (BEMS), etc. using digital computers1 is already well established. It might include lift group supervisory information as part of the comprehensive information system for a whole building, which might also include other facilities such as employee identification, security control, fire control, environmental control, water treatment and data logging. However, it is not sensible to include the task of lift traffic control in any centralised building control system. Thus, a lift should have all aspects of its control managed independently of other building systems.
