Shell model

The VDI 3813 shell model is used to explain room automation in TF8040. The shell model describes levels within which the room functions, consisting of sensor, user or actuator functions, are used.

The user and sensor functions of one shell affect the actuators of all enclosed shells. Thus, the position of a user function in the shell model determines the subset of actuators on which this user function acts.

Example:

A schedule for central control of all the lights on a floor, e.g. for cleaning an office, is positioned in the Floor shell.

If the cleaning operation has to be planned separately in the sub-areas of the floor, for example if there are individual tenant areas in which the cleaning operation is carried out separately, a schedule must be placed for each area.