Method for Transmitting Data in a Communication Network of an Industrial Automation System and Coupling Communication Device

A coupling communication device for an industrial automation system;

• comprising:
• a plurality of terminals for a connection to communication devices connected to one another inside an industrial communication network;
• transmitter and receivers which are assigned to the terminals and are assigned at least a first queue and a second queue;
• a coupler which interconnects the transmitters and receivers;
• wherein the coupling communication device is configured and such that:
• first data frames comprising control data for the automation system are transmitted only within periodic first intervals of time, the first intervals of time each being subdivided at least into a first and a second sub-interval,
• received first data frames which are to be forwarded are inserted into the first queue during the first sub-intervals,
• received first data frames which are to be forwarded are inserted into the second queue during the second sub-intervals,
• first data frames are removed from the first queue for forwarding during a second sub-interval respectively following their insertion,
• first data frames are removed from the second queue for forwarding during a first sub-interval respectively following their insertion,
• second data frames, which are assigned to data streams comprising at least one of (i) sequences of data frames and (ii) third data frames, for the transmission of which no quality of service or a quality of service below a predefined threshold value is stipulated, are transmitted only within periodic second intervals of time.