A communications method, in particular for hospital and nursing beds

摘要

The invention relates to a communications method of communicating states from anactivation unit to a receiver via a communications bus, wherein the state may beactivation/deactivation of an activation unit, and wherein the state is communicated tothe receiver via a serial data stream timed by a clock signal, said data stream transmittingdata packets which comprise an identification part and a data part, wherein:• the identification part comprises a plurality of bits which identifywhich activation units the data packet concerns, and • the data part comprisesa plurality of bits which individually identify the state of an activation unit.The invention also relates to a system based on the communications method andcomprising an activation unit and a receiver. In addition, the invention relatesto an activation unit and a receiver.