Siemens Aktiengesellschaft

Beckhoff Automation Gmbh

Siemens Aktiengesellchaft

Phoenix Contact Gmbh + Co. Kg

Karl Weber

Holger Büttner

Dirk Janssen

Herbert Barthel

Günter Steindl

Joachim Feld

Karl-Theo Kremer

Hans Beckhoff

Thomas Rettig

Erik Vonnahme

Thorsten Bunte

Guido Beckmann

Johannes Beckhoff

Dieter Klotz

Johannes Birzer

Andreas Maximilian Schenk

Karl-Heinz Krause

Gunnar Lessmann

Hartmut Schuetz

Heiner Fuchs

Dieter Brueckner

Florian Essler

Albert Tretter

Hartmut Von Krosigk

Paulo Mendes Silva

Juergen Lechtermann

Rudolf Stromberger

Andreas Uhl

Joerg-Peter Zaech

Armin Trauth

Joachim Lorenz

Klaus Spichtinger

Rainer Hoffmann

Jahanzaib Imtiaz

Jürgen Prof Jasperneite

A method for synchronizing time in an Ethernet-based network having a master network subscriber, a first segment and a second segment. Each segment has at least one network subscriber. The second segment is connected to the first segment by a first network distributor, arranged in the second segment. The method comprises steps for sending out a synchronization telegram addressed to the second segment by the master network subscriber, the synchronization telegram being of the first type; receiving the synchronization telegram by the first network distributor, for conversion into a second type; forwarding the synchronization telegram to a network distributor of the second segment, by the first network distributor; reading out a synchronization value stored in the synchronization telegram by the first network distributor of the second segment; and adjusting a speed of a local system time of the network distributor of the second segment, using the synchronization value.

Method for synchronizing time in an ethernet-based network

A method for synchronizing time in an Ethernet-based network having a master network subscriber and a slave network subscriber includes sending out a first telegram via the master network subscriber, where the slave subscriber receives the first telegram at a first receipt time value of a local system time and stores the first receipt time value. The method can also include reading out the first receipt time value via the master subscriber, sending out a second telegram by the master subscriber, where the slave subscriber receives the second telegram at a second receipt time value of the local system time and stores the second receipt time value, and reading out the second receipt time value via the master network subscriber. A speed parameter of the local system time can be calculated from the receipt time values via the master network subscriber, and transmitted to the slave subscriber.

A method for real-time data communication between subscribers in an automation network is provided. The automation network includes an active subscriber, a plurality of passive subscribers and at least a connecting unit. The method includes the active subscriber arranging n data packets to be transmitted in a transmission order with a total occupancy time duration of the transmission order, performing an optimizing procedure for determining an optimized transmission order with minimum total occupancy time, and transmitting the n data packets in the optimized transmission order to the passive subscribers. An active subscriber for carrying out the method and an automation network comprising an active subscriber are also provided.

Method for data communication between subscribers in an automation network, master subscriber for an automation network, and automation network

A first communication subscriber transmits a first data packet comprising data and an identification character to the second communication subscriber. The first communication subscriber and the second communication subscriber respectively determine a first and a second acknowledgement character on the basis of the identification character. The second communication subscriber transmits a second data packet comprising the second acknowledgement character back to the first communication subscriber. The first communication subscriber can thus check, on the basis of the second acknowledgement character, whether the first data packet arrived at the second communication subscriber.

Method for transmitting data packets on a data transmission path between two communication subscribers, automation system and computer program

A method for transmitting telegrams in an automation system which is composed of a plurality of network components connected to form a network, includes the steps of a) receiving with a first of the network components a first telegram composed of datagrams associated with each of the network components, b) removing from the first telegram a first datagram associated with the first network component, c) inserting into the first telegram an updated datagram associated with the first network component, thereby forming a second telegram, and d) transmitting the second telegram to at least one of the other network components. The steps a) through d) are carried out by each of the network components.

Method for transmitting telegrams in an automation system

A communication system comprises a first and a second master unit and at least one slave unit, wherein the second master unit is switched into a data transmission chain reaching from the first master unit to the slave unit in order to continue data transmission if a link fault occurs.

Communication system having a master/slave structure

A system and a method are provided for addressing at least two subscribers that are redundant in respect of each other in a communication network. The subscribers are each permanently assigned a unique address which is different for each subscriber. The subscribers form a group such that the subscribers in the group are redundant in respect to each other. The group of subscribers is assigned a unique group address which is only activate for one of the subscribers in the group and de-active for each of the remaining subscribers in the group. At least one higher-order unit is provided for the activation and deactivation.

Addressing of redundant subscribers in a communication network

A communication system comprising a master unit and a plurality of slave units. In error mode, e.g. when a path error or a complete failure of a subscriber occurs, data transmission is carried out in a loop, starting from the master unit, via a first communication path and a second communication path.

A method of transferring data in an automation system having a plurality of communicatively connected communication stations is provided. The communicative connection of the communication stations follows a predefined hierarchy, in which a plurality of communication stations are grouped together in a line and an alias matched to the hierarchy is assigned to each communication station. Telegrams sent in the automation system designate a destination communication station also by its alias, whereby each line is closed to form a ring by way of its transition, designated as entry point, from the next higher line by way of the entry point, and telegrams in the ring thus resulting with the line are forwarded both in the direction of the hierarchy of the allocated alias designations and also in the opposite direction.

Method for transferring data in an automation system

A network component including three ports as well as a method for the operation thereof is provided. The ports are exclusively allocated to individual hierarchical levels of a topology of an automation system, in which the network component is operated along with an optional plurality of additional network components, such that telegrams sent in the automation system are efficiently forwarded, particularly on the basis of designators assigned to the network component as an alias. The designators are assigned in an especially recursive process.

Network component, method for the operation of such a network component, and automation system with such a network component

A method for allocation of a buffer memory with three buffers of a module having a processing unit and a bus connection is provided. The module sends or receives data via the bus connection and uses the processing unit to generate data for transmission via the bus connection and process data received via the bus connection. The bus connection and the processing unit function as a producer or consumer in a communication relationship established via the buffer memory. Each buffer assumes one of four statuses&#x2014;'input area local', 'local', &#x201c;input area external&#x201d; and &#x201c;external&#x201d;. Either the bus connection or the processing unit attempt to reserve one of the three buffers by a strategy: when one of the three buffers is already allocated, this buffer is used. Otherwise a buffer with the status &#x201c;input area external&#x201d; or &#x201c;input area local&#x201d; is used and the status &#x201c;external&#x201d; or &#x201c;local&#x201d; is assigned.

Method for the allocation of memory in a buffer memory

Method and a system for transmitting data in a switchable data network. To improve the transmission of data having different priorities in the switchable data network, telegrams are assigned priorities, with said telegrams (-) in each case having a beginning and an end. Data telegrams assigned a first priority are sent during a first phase from first users to second users, with the first phase being characterized by a defined receive time of the end of one or more of the data telegram at one or more second users.

Network data transmission based on predefined receive times

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

Method for transmission of data telegrams in a switched cyclical communication system

A method and a switching router for simple scheduling of realtime data telegrams with calculable load-insensitive cycle times. A transmission cycle () is subdivided into three phases. In a first phase (), only realtime data telegrams are sent; in a second phase (), realtime and non-realtime data telegrams are sent; and in a third phase (), the transmission of long non-realtime data telegrams is suppressed. Short filler telegrams can be sent during the phase (). This ensures that data transmission of the realtime data telegrams will proceed smoothly. Transmission in certain phases is regulated by the priorities assigned to the data telegrams.

Scheduling of realtime communication in switched networks

The invention relates to a method and a system for communication in a data network (), in particular switched Ethernet, and a user () in such a data network (). To reduce the communication resources required for the transmission of telegrams (-) in the data network (), it is proposed that time segments are defined, which are repeated cyclically at a basic clock rate, that telegrams (-) are each assigned a first identifier U, which allocates to the respective telegram (-) a group of n successive time segments for transmission of the respective telegram (-), whereby the group is repeated cyclically, that the telegrams (-) are each assigned a second identifier Z, which allocates to the respective telegram (-) an mth time segment in the sequence of n time segments of a group for transmission of the respective telegram (-), whereby 1&#x2266;m&#x2266;n and that the telegrams (-) are transmitted in the respectively assigned time segment.

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Altdorf, Germany

Karl Weber