operating time slot method. With this technique, a central station, the Manager Node
(MN), distributes the access authorization to the connected stations. In Ethernet Powerlink, this procedure iscalled SlotCommunication Network
Management (SCNM) and forms the basis for deterministic access. In terms of concept, in Ethernet Powerlink one station assumes the function of the manager. It sets the timing for all connected stations, the Controlled Nodes (CN). The controlled nodes may only transmit if they are requested to do so by the manager node.