What is the role of Points/Tags in BAS?

• A. Data references for devices
• B. User authentication credentials
• C. Physical hardware components
• D. Scheduling programs

Answer: (A)

Points and Tags are the data references used by a Building Automation System to access real-time values from devices and to issue control commands. Each point represents a single data item—like room temperature, a damper position, or an on/off status. By giving every device value a point or tag, the system can read, log, trend, generate alarms, and drive logic and visualizations with a consistent identifier, even when devices use different communication protocols. This abstraction makes it possible to build schedules, setpoints, and control routines that operate on the same named points rather than on hardware specifics. So the role is to provide data references for devices, enabling data collection, monitoring, and control across the BAS. They aren’t credentials for authentication, they aren’t physical hardware components, and while schedules and logic reference these points, the points themselves are the data references, not the scheduling programs.