Abstract: The invention relates to a method for commissioning a bus system and to a corresponding bus system. A test is carried out preferably after installation of the bus system and before it is actually put into operation to check whether the system is functioning properly. The test can comprise several stages which each test different functional aspects of the bus system. The bus system test can be carried out especially from a distributor or gateway (1) which couples several voltage supply lines (2-4), designed to carry information in addition to a supply voltage, with a central voltage supply line (L, N).

Abstract: In order to control the luminosity in a room (1) lighted with several light sources (2a . . . , 3a . . . ) or several groups of light sources, a system is used with which the ratio between the light intensities of the individual light sources or groups of light sources can be adjusted or modified, and with which the total luminosity in the room (1) can be adjusted or modified while the ratio between the light intensities of the individual light sources or groups of light sources is kept constant. In particular for this purpose, a control device (7) is integrated in the system and connected to all operating devices (4a . . . , 5a . . . ) of the various light sources (2a . . . , 3a . . . ) to control the power consumption of the individual light sources (2a . . . , 3a . . . ).

Abstract: A screening device (3) for screening exterior light (2) which illuminates a room (1), is controlled such that in the room on the one hand, user comfort with regard to freedom from dazzling and room temperature is optimal and, on the other hand, energy consumption for artificial lighting within the room or for heating and cooling the room is minimized.

Abstract: In a system for the control of several appliances (1-5), in particular light fittings distributed in several rooms (A, B, C), from a central command generator (10, 11), and with a method for setting this system into operation, one of the appliances (5) is selected and monitored for the issue of an externally detectable identification signal. All appliances (1-5) already have, before installation of the system, an original address (U4, U2, U1, U5, U3) and are installed without regard to these original addresses. After the installation, the original addresses (U4, U2, U1, U5, U3) are chosen one after the other, and the associated appliances (1-5) instructed to identify themselves. When the selected appliance (5) identifies itself, there is transmitted thereto a preset operational address (B5). This method is then repeated with other selected appliances (1-5), until all appliances have operational addresses (B1-B5).