METHOD FOR SENDING MESSAGES FROM A LOWER-LEVEL CONTROLLER TOA HIGHER-LEVEL CONTROLLER

An existing redundant physical path structure should be used for sending (fault) messages from a lower-level controller to a higher-level controller, without unnecessarily having to load the processing capacity of the higher-level controller by redundant messages in the process. The invention achieves this aim in that a message is first of all transmitted via each transmission path, and a further message is always sent as soon as an acknowledgement of a previous message is received, the further message being sent via that transmission path via which the acknowledgement was received.