Abstract: A method of filtering redundant frames including a MAC source address, a frame ID and a CRC value, in a network node with two ports each including a transmitting device and a receiving device, is provided. The transmitting device includes a transmission list in which frames to be transmitted are stored. The receiving device includes a receiving memory for storing a received frame. For filtering redundant frames in a network node, a first frame is received by one of the two ports. After reception of the MAC source address and the frame ID of the first frame in the transmission list of the port, a second frame with the same MAC source address and frame ID is sought. If the second frame is present, the first frame is neither forwarded to a local application nor forwarded to send to other ports, and the second frame is not sent.

Abstract: A destination node in a data network for transmission of real-time data by a data telegram, the data telegram including an identification, data and a transfer status, is provided. The destination node includes a device for receiving a first data telegram, a device for storing the data of the first data telegram and an assigned timer value, a device for receiving a second data telegram and a device for replacing the stored data of the first data telegram, wherein the stored data of the first data telegram is replaced with data of the second data telegram. Further, a method and a non-transitory storage medium are provided.

Abstract: The invention relates to a switching node comprising a dynamic address table in a data network, in addition to a method for creating a dynamic address table of this type for a switching node. The method comprises the following steps: receipt of a first data message with a source address at a port of the switching node; entry of the source address, details of the port and a counter initial value in a line of the address table that is assigned to the source address as the target address, whereby the current counter value indicates the validity of the entry and the current counter value is modified, if a second data message with the source address as the target address is received and the entry is valid.

Abstract: A destination node in a data network for transmission of real-time data by a data telegram, the data telegram including an identification, data and a transfer status, is provided. The destination node includes a device for receiving a first data telegram, a device for storing the data of the first data telegram and an assigned timer value, a device for receiving a second data telegram and a device for replacing the stored data of the first data telegram, wherein the stored data of the first data telegram is replaced with data of the second data telegram. Further, a method and a non-transitory storage medium are provided.

Abstract: A destination node in a data network for transmission of real-time data by a data telegram, the data telegram including an identification, data and a transfer status, is provided. The destination node includes a device for receiving a first data telegram, a device for storing the data of the first data telegram and an assigned timer value, a device for receiving a second data telegram and a device for replacing the stored data of the first data telegram, wherein the stored data of the first data telegram is replaced with data of the second data telegram. Further, a method and a non-transitory storage medium are provided.

Abstract: A method for transmitting real time data packets in a cyclic communication system, each transmission cycle having a first partial cycle (IRT-Z) for a real time communication portion and a second partial cycle (NRT-Z) for a non-real-time communication portion. The method includes determination (118) of a cycle number and processing of a transmission sequence of real time data packets in the first partial cycle. The transmission sequence is composed of one or more partial sequences (1, 2, 3, 4, 5), and the composition depends on the cycle number.

Abstract: A processing of consistent data sets by asynchronous application of a subscriber in an isochronous, cyclical communication system is provided. Accordingly, by connecting a communication memory and a consistency, transmission and reception buffer, copying processes leading delay can be kept to a minimum.

Abstract: A destination node in a data network for transmission of real-time data by a data telegram, the data telegram including an identification, data and a transfer status, is provided. The destination node includes a device for receiving a first data telegram, a device for storing the data of the first data telegram and an assigned timer value, a device for receiving a second data telegram and a device for replacing the stored data of the first data telegram, wherein the stored data of the first data telegram is replaced with data of the second data telegram. Further, a method and a non-transitory storage medium are provided.

Abstract: The invention relates to a method for transmitting real time-critical data using data messages in a data network. The data messages have an identification, useful data and a transfer status. According to the inventive method, data messages comprising errors are replaced by replacement messages that have the same structure as the data messages. The replacement message has the same identification as the data message to be replaced and is thus forwarded via the switching node, which would have been used to route the error-free data message. The replacement message can contain details of the type of transmission error.

Abstract: The invention relates to a method for transmitting a data telegram from a non-real-time domain to a real-time domain, comprising the following steps: generation of a non-real-time data telegram comprising a useful data zone, the data telegram containing a real-time or a non-real-time identifier in addition to a data telegram identifier (identifier i) in the useful data zone thereof when the real time identifier is provided; monitoring of the non-real-time data telegram for the presence of a real time identifier by the coupling unit if the real-time identifier is provided; transmission of the useful data and real-time identifier (identifier i) from the useful data zone of the non-real-time data telegram to a user interface of the coupling node; storage of the useful data in a storage zone of a communication memory which is associated with the identifier.

Abstract: A method of filtering redundant frames including a MAC source address, a frame ID and a CRC value, in a network node with two ports each including a transmitting device and a receiving device, is provided. The transmitting device includes a transmission list in which frames to be transmitted are stored. The receiving device includes a receiving memory for storing a received frame. For filtering redundant frames in a network node, a first frame is received by one of the two ports. After reception of the MAC source address and the frame ID of the first frame in the transmission list of the port, a second frame with the same MAC source address and frame ID is sought. If the second frame is present, the first frame is neither forwarded to a local application nor forwarded to send to other ports, and the second frame is not sent.

Abstract: A method for the transmission of data messages in a switched cyclical communication system (38, 39) with a linear or ring arrangement of the users. Real-time critical data messages are transmitted in a first segment (20) of a transmission cycle (31), without the need to first plan the send and receive instants in the forwarding users, such that the chronological start (21) of the first segment (20) of a transmission cycle (31) is guaranteed by all users in all transmission cycles through monitoring. The duration of the first segment (20) of a transmission cycle (31) can be fixedly specified or automatically adjusted using a timeout procedure.

Abstract: The method carrying out permanent redundant transmission of data messages in disjunctive paths, such that circulating data messages can be reliably identified and destroyed. The method includes splitting a redundant message into two data messages in the respective branching point in a transparent manner. The method further includes causing no additional load for the receiver of the two identical messages by, for instance, allocating a current cycle number to the received data message in a cyclic communication system (26). This can also be ensured in a non-cyclic communication system by means of software processing, for instance, by processing the header identifier of the data messages. In particular, the behavior of the communication system (26) with respect to “learning” the addresses in the individual users (1, 2, 3, 4, 5), more particularly the switches, is not altered for the remaining non-redundant data traffic.

Abstract: A subscriber in a communication system (102) for transmitting and receiving data telegrams, wherein a data telegram includes reference data or user data and an identifier. The control of transmitting and receiving data telegrams is based on check data sets (122). A check data set includes an address for the reference data or user data and the identifier of the data telegram, which is assigned to the check data set. A transmission list (120) includes a first number of check data sets. A circuit unit (128) generates, based on a check data set of the transmission list, a data telegram to be transmitted. In addition, a second number (136, 138) of check data sets is provided. An assignment unit (140, 144) assigns a received data telegram to one of the check data sets of the second number of check data sets, wherein the assignment is carried out based on the identifier for the received data telegram.

Abstract: A method for operating an end-user of an isochronous cyclical communication system, including the following steps: receipt of a synchronisation data telegramme from a connecting user in the communication system by the end-user, whereby the synchronisation data telegramme is affected by the run time of a transmission run between the connecting user and the end-user, synchronisation of a time base of the end-user via the synchronisation data telegramme, resulting in a synchronisation of the time base with a tolerance corresponding to the run time, cyclical processing of a transmission list by the end user within a communication cycle corresponding to the time base of the end user, whereby the transmission of a data telegramme occurs according to the transmission list from the end user to the connecting user at the earliest at the beginning of the communication cycle and at the latest at a point equivalent to the tolerance before the projected transfer time point of the relevant data telegramme by the communicat

Abstract: The invention relates to a method for synchronizing a communications cycle and a communications node in a network. The node is formed with devices for receiving a desired value for a time base of a communications cycle of the communications node in a communications link to an additional communications node of the network. The node also includes devices for determining a system deviation between the desired value and an actual value of the time base, and a device for generating a manipulated variable for correcting the time base in accordance with the system deviation.

Abstract: A method for receiving data messages in communications systems having redundant network paths. Received data of a peripheral representation or image is routed to a node along at least two different network paths. This makes it possible to store a consistent peripheral representation or image in a memory (12) of a node, if there is a disturbance in the data transmission along one network path.

Abstract: The invention relates to a method for operating an isochronous, cyclic communication system, wherein one communication cycle can be subdivided into a first part for real-time communication and a second part for non-real-time communication. The communication system comprises subscribers and a memory is provided to store configuration data in each subscriber. The inventive method comprises the following steps: the communication system is operated with first configuration data for real-time communication; second configuration data is transmitted for real-time communication in a second part of one or several communication cycles; the second configuration data is stored in the memories of the subscribers; a transfer time indicating the moment in time when transfer occurs from the first configuration data to the second configuration data.

Abstract: A method and a system for transmitting data by means of a first data network (1) have first means for transmitting data in at least one first transmission cycle, the first transmission cycle being subdivided into a first area (4) for transmitting real-time-critical data and a second area (5) for transmitting non-real-time-critical data, and by means of a second data network (2) having second means for transmitting data in at least one second transmission cycle, the second transmission cycle being subdivided into a third area (7) for transmitting real-time-critical data and into a fourth area (8) for transmitting non-real-time-critical data, and with a switching unit (13) for transmitting real-time-critical data of the first area into the third area.

Abstract: The invention relates to a method for synchronizing nodes of a communication system comprising the following steps: receipt of a first synchronization message by a first node, whereby the first synchronization message contains a desired receipt time by a first node; correction of a time base of the first node, based on a deviation between an actual receipt time, determined as a result of the base time, and the desired receipt time.