Room functions
The functions of a room are divided into sensor, application and actuator functions.
The signals from the sensors and actuators are either recorded or output directly by a terminal or integrated via a fieldbus system. The interface or communication of the sensor and actuator functions with the application functions of the room is always identical. This allows the room application functions to remain the same regardless of the fieldbus system selected.
When using fieldbus systems for room automation, the measuring signals of the sensors or the control commands of the actuators are integrated by incorporating the corresponding fieldbus terminal.
Room automation functions according to VDI 3813:

The room sensor functions not only serve the application functions of a technical system, but are also processed by the application functions of illumination, sun protection and room air condition control. The presence monitoring of a room, which is used for the automation of the three technical systems mentioned above, is particularly representative of this.
The type of application functions for the technical systems illumination and sun protection depend heavily on the use of the room. These should be determined early in the design process by the building automation designer in conjunction with the building operator.