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WO2008031695A1 - Réseau de communication avec des abonnés principaux et un serveur de topologie - Google Patents

Réseau de communication avec des abonnés principaux et un serveur de topologie Download PDF

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Publication number
WO2008031695A1
WO2008031695A1 PCT/EP2007/058671 EP2007058671W WO2008031695A1 WO 2008031695 A1 WO2008031695 A1 WO 2008031695A1 EP 2007058671 W EP2007058671 W EP 2007058671W WO 2008031695 A1 WO2008031695 A1 WO 2008031695A1
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WO
WIPO (PCT)
Prior art keywords
topology
communication
communication network
server
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2007/058671
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German (de)
English (en)
Inventor
Werner Blumenstock
Matthias Wenk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2008031695A1 publication Critical patent/WO2008031695A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40169—Flexible bus arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery

Definitions

  • the present invention relates to a communication network with main participants, which are interconnected according to a current actual topology.
  • Ethernet-based communication networks are widespread and implemented in many forms.
  • An example of such an embodiment is Ethernet-based communication networks.
  • Communication networks are used for real-time bound Kommunikati ⁇ configuration tasks (for example in the context of industrial controllers) and for non-real-time-based communication tasks.
  • Real-time communication methods involve deterministic communication.
  • deterministic communication means that it is known in advance which main participant should exchange which data with which other main participant and, above all, in which time frame the data exchange takes place.
  • EtherCAT networks A similar problem exists in so-called EtherCAT networks.
  • the efficiency of the communication can be increased if the communication can be topology-dependent.
  • the topology of the communication network is usually ⁇ projek ⁇ advantage by means of the engineering system.
  • the procedure of the prior art requires that the configured topology of the communication network and the actual actual topology of the communication network match.
  • each projek ⁇ oriented main participant must be in place no additional main participant must be present and the main participant must be connected according to the configured topology.
  • the object of the present invention is a
  • Communication network of the type described above further develop such that changes in a once configured actual topology without engineering system are possible and yet a topology-dependent communication of the main participants is possible in the operation of the communication network.
  • the communication network includes a topology server
  • the topology server is programmed such that it checks whether a network-internal event has occurred, and in the case of entry of the internal network EVENT ⁇ Nisses automatically determines the current actual topology, hand arrival of the main participants associated Communication relationship determined topology-dependent communication data and transmitted to each main participant the relevant for him part of the topology-dependent communication data.
  • the network-internal event can especially be a Zeitab ⁇ run, a change in the current actual topology and / or a power-up.
  • the topology server can then determine the current actual topology and the topology-dependent communication data and transmit the topology-dependent communication data when it is specified by an operator of the communication network from the outside an initiation signal.
  • the topology-dependent communication data may in particular include communication planning.
  • the topology server can be designed as a full-fledged engineering system. In this case, not only the topology-dependent communication data can be determined by him. Rather, the communication relationships assigned to the main participants can also be changed by him. Preferably, the topologies However gieserver programmed such that the main part ⁇ holders associated communication relationships of it can not be changed. This measure ensures that the topology server can be realized considerably more compactly.
  • the topology server performs the calculation and the transmission of topology-dependent communication data through only if no previous actual topology and / or none of the previous actual topology stored associated topology-dependent communication data in the topology server or indeed a previous actual topology and the previous actual topology assigned in the topology server topology-dependent communi ⁇ cation data are stored, the previous actual topology per ⁇ but different to the current actual topology.
  • the topology server determines whether and, if appropriate, which supplemental participant contains the communication network.
  • the earlier actual topology may include any supplemental participants included in the communication network.
  • the topology server is preferably formed in this case such that it does not perform the determination and the transfer Mitt ⁇ development of communication scheduling when the ac- actual actual topology differs only from the former actual topology with regard to the supplementary participants.
  • the topology server determines in the determination of the current actual topology, and if so which complement participants are included in the communication network, the topology server is preferably such program ⁇ mized that - analogously to the main participants - the complement participants associated communication relationships of it can not be changed are.
  • the topology server automatically transmits activation signals to the main subscribers for activating the transmitted parts of the topology-dependent communication data.
  • the topology server it can be determined from which point in time the topology-dependent communication data transmitted to the main subscribers is valid.
  • the topology server assigns the erstoff him ⁇ th topology-dependent communication data of the current actual topology and stores the current actual topology and determined by him topology dependent communication data from. This makes it possible to update the actual topology and the topology-dependent communication data.
  • the topology server stores the ermit ⁇ Telte from it current actual topology and / or determined by it topology-dependent communication data such that they can be accessed by other devices. For example, they can be retrieved from another machine.
  • the other computer may in particular be the already mentioned engineering system.
  • the topology server checks whether the associated main part ⁇ holders communication relationships by means of the current actual topology can be realized. Depending on the result of the check, the topology server can use a man-machine ne interface of the communication network issue an error message or determine the topology-dependent communication data. By means of this measure, the operational safety and the operating comfort of the communication network can be increased.
  • the topology server preferably checks whether the topology determined by it dependent data communication to ensure that between the main participants communications unit concluded a predetermined time limit fulfillment ⁇ len. Depending on the result of the inspection of the topology server can issue a warning message via a man-machine interface of the communication ⁇ network. The warning informs an operator that a real-time condition, ie a reaction within the predetermined time limit, is no longer fulfilled.
  • the topology server is usually used in industrial control. In this case, it is preferably associated with a human machine interface of the industrial controller or an input / output controller of the industrial controller. He may be integrated into the facility to which he is assigned.
  • FIG. 1 shows a block diagram of a communication network
  • a communication network has main subscribers 1.
  • the main participants 1 are shown in FIG 1, for example, in network topology arranged in a line structure.
  • the arrangement of the main participants 1 in a line structure is not mandatory. There could also be other structures, for example a ring structure or a double-ring structure.
  • supplemental participants 2 may be present.
  • the supplementary participants 2 are not arranged in the topology structure of the main subscribers 1, but are only connected to the communication network via the main subscribers 1.
  • the main participants 1 preferably have the following basic structure according to FIG. 2:
  • the interface 3 5 may have, for example, two partial interfaces 4, wherein each part of interface 4, 5 is connected with either ge ⁇ precisely a part interface of another Participant 1 or terminated.
  • Such embodiments of the interface 3 are common, especially in Ethernet-based communication networks.
  • the interface 3 is connected to a filter circuit 6.
  • the filter circuit 6 receives data packets P which are supplied to it via the interface 3. It checks whether the received data packet P is intended for the main subscriber 1, in which the filter circuit 6 is arranged.
  • the filter circuit 6 If the received data packet P is intended for the receiving main subscriber 1, the filter circuit 6 carries the data packet P of a processing circuit 7 of the main processor. Participant 1 to. Furthermore, feeding the filter circuit 6 Da ⁇ tenzige P that are sent from the main station 1, in which the filter circuit 6 is arranged, in the actual topology via the interface 3 (here, the line structure) a.
  • the line structure is not separated by the interface 3 ⁇ .
  • Received data packets P which reach the interface 3, are in this case also simultaneously supplied to the other main subscribers 1.
  • Sent data packets P are fed to the other main participants 1 in both directions.
  • the behavior of the filter circuit 6 is in this case with respect to received data packets P except for the feeding of the data packets P to the processing circuit 7, regardless of whether the received data packet P is determined for the respective main participant 1 ⁇ or not.
  • a transmitted data packet P is always transmitted in both directions. Also, the emission is independent of whether the main station 1, for the transmitted data packet P is determined, left or right of the ⁇ represent provided in FIG 2 the main station 1 is arranged in this case.
  • the filter circuit 6 operates in a different way.
  • the filter circuit 6 receives each data packet P received via one of the subinterfaces 4, 5 (eg the subinterface 4). It checks whether the entge- gen taken data packet P for the "own" main station 1 determines is If the data packet P for its own main ⁇ subscriber 1 determines., Leads the data packet P of the proces ⁇ crizscloc 7 to you will be attracted to.
  • the filter circuit 6 feeds the received data packet P back into the line via the other of the subsection parts 4, 5 (eg the subinterface 5) so that it is fed to the next main subscriber 1.
  • the processing circuit 7, the pa ⁇ ket P is not supplied in this case.
  • the filter circuit 6 In a planned communication of the filter circuit 6 is known, via which of the sub-interfaces 4, 5 it must communicate with wel ⁇ chen the other main participant 1. Therefore, it can feed the data packet P into the actual topology via only one of the subinterfaces 4, 5 when sending a data packet P. This makes the data traffic more efficient, since the communication network is less heavily loaded. Furthermore, the filter circuit 6 with received data packets P check whether the subcircuit 4, 5, over which the relevant data packet P was received with a predetermined subcircuit 4, 5 corresponds. It can thereby detect any deviation or change in the actual topology.
  • the allocation of the subcircuits 4, 5 to certain other main subscribers 1 can determine the filter circuit 6 on the basis of a communication planning 10 (or more generally topology-dependent communication data 10), which is stored in a planning memory 11.
  • the planning memory 11 is connected to the filter circuit 6, so that the filter circuit 6 the content of the planning memory 11 (ie, the Kommunikati ⁇ ons doctrine 10) can read and use.
  • the communication plans 10 of all main participants 1 in their entirety correspond to a communication planning of the actual topology.
  • data may be stored in the scheduling memory 11, for example, from which the processing circuit 7 (alternatively or additionally from the filter circuit 6) can determine which data packets P in which Actual topology should be fed and / or at what times data packets P are expected from other main participants 1.
  • the communication planning 10 of the main participants 1 must be changed, at least as a rule. This will be explained below with reference to a simple example.
  • each main participant 1 is formed according to FIG.
  • the central main ⁇ participants 1 is connected via each of its two sub-interfaces 4, 5, each with one of the outer main participant 1.
  • the two outer main participants 1 are connected via one of its two sub-interfaces 4, 5 with the central main participant 1, the other of the sub-interfaces 4, 5 is terminated.
  • the terminated sub-interfaces 4, 5 are not used.
  • Already interchanging terminierter and used sub-interface 4, 5 of the outer main participants ⁇ 1 in this case represents a topology change, which must be considered in the communication planning 10 of the two outer main participant 1 accordingly.
  • the entirety of the communication planning 10 is determined by means of an engineering system, by means of which the communication relationships 8 of the main participants 1 can also be configured.
  • a topology server 12 is coupled to the communications network.
  • the topology server 12 is a software programmable device.
  • the topology ⁇ server 12 is supplied via a suitable interface 13, a Com ⁇ computer program 14, which is stored on a data carrier 15.
  • the data carrier 15 can be designed, for example, as a USB memory stick.
  • Corresponding ⁇ ponding the interface 13 is formed in this case as a USB interface.
  • the design of the data carrier 15 and the interface 13 may also be different. In ⁇ example, training as a CD-ROM and CD drive or as a hard drive or RAM of a server and Internetanbin ⁇ tion is possible.
  • the computer program 14 is designed such that the to ⁇ pologieserver 12 due to the programming by the computer program 14 executes a method which will be explained in more detail below in conjunction with FIG.
  • the topology server 12 first checks in a step S1 whether an in-network event has occurred.
  • the network- internal event can be, for example, a timeout, a change of the current actual topology or a startup. For example, it is possible to check whether since the last review Fung is the current actual topology for an hour or a day or any other period of time (greater than one day, less than one hour between one hour and one day) ver ⁇ painted. A combination of several possibilities can also represent the network-internal event. Even a one ⁇ comes of another internal network event can be checked for. B. an update of the computer program 14th
  • step S2 the topology server 12 checks whether an initiation signal is given to it by an operator of the communication network from the outside.
  • step S3 the topology server 12 determines the current actual topology of the communication network - subsequently provided with the reference numeral 17 '. This step is known as such in engineering systems - compare the comments in the introduction to the description - and therefore need not be explained in more detail.
  • step S4 the topology server 12 determines topology-dependent communication data 18 'based on the communication relationships assigned to the main participants 1, for example a total communication planning 18'.
  • the step S4 is also known as such in engineering systems and therefore need not be explained in detail.
  • step S5 the topology server 12 automatically transmits to each main subscriber 1 the information relevant to the relevant part of the topology-dependent communication data 18 ', that is, for example. B. the
  • the topology server 12 can transmit data packets P to the relevant main participant 1, so that the Processing device 7 of the relevant main participant
  • I accept the communication planning 10 intended for it and store it in the scheduling memory 11.
  • the storage of the communication planning 10 in the scheduling memory 11 by the processing device 7 is shown in FIG. 2 by an arrow from the processing circuit 7 to the scheduling memory
  • the main users 1 prefferably, however, in a step S6, the topology server 12 transmits to the main participants 1 activation signals A for activating the transmitted topology-dependent communication data 18 '.
  • a step S7 may be arranged downstream, in which the topology server 12 checks whether to adjust the further execution of the program fourteenth If this check is negative, the topology server 12 returns to step S1. Otherwise, the execution of the program Computerpro ⁇ 14 is completed. Step S7 is only optional. He could be omitted. If it does not exist, computer program 14 must be called again to run again.
  • step S the topology server 12 checks whether an earlier actual topology 17 has been stored in an internal memory 16 of the topology server 12. If the check of the step Sil is negative, the topology server 12 proceeds to step S4.
  • step S12 the topology server 12 checks whether there is stored in the internal memory 16 an overall communication schedule 18 which is assigned to the earlier actual topology 17 found in step S11. If this check is negative, the topology server 12 proceeds to step S4.
  • step S12 If the check of step S12 has been positive, then the topology server 12 checks in step S13 whether the in
  • Step S3 determined actual topology 17 'with the read from the internal memory 16 previous actual topology 17 matches. If the check of step S13 is negative, the topology server 12 proceeds to step S4.
  • step S5 a step S14 nachzu ⁇ .
  • step S14 the topology server 12 assigns the total communication planning 18 'of the current actual topology 17' determined by it. He also saves the current actual topology 17 'and the determined heylonkommunika ⁇ tion planning 18' from. The storage takes place in the internal memory 16 of the topology server 12.
  • the internal memory 16 is preferably designed such that its memory contents are retained even when the external power supply of the topology server 12 is switched off.
  • it may be formed as a magnetic memory, as an EEPROM, as a buffered RAM or otherwise. It may be permanently connected to the topology server 12 or be detachable from it. For example, it can be designed as a USB stick.
  • step S14 in step S14 tospei ⁇ -assured actual topology displaced 17 ', the former actual topology 17.
  • the stored overall communication planning 18 displaces' the previously stored in the internal memory 16 earlier total communication planning 18.
  • the current Actual topology 17 'and the total communication planning 18' ascertained by the topology server 12 must be stored in the internal memory 16 in addition to the previously stored earlier actual topology 17 and in addition to the previously stored total communication plan 18. If appropriate, it can be decided on the basis of an input by the operator whether the newly stored actual topology 17 'and the newly stored overall communication planning 18' displace the previously stored data 17, 18 or not.
  • the topology server-internal memory 16 stored actual topology 17 and stored in the internal memory 16 total communication planning 18 are preferably retrievable from other devices 20. This is indicated in FIG. 1 by a corresponding arrow from the internal memory 16 to the other device 20.
  • the other device 20 may be configured as a game as the engineering system in ⁇ .
  • the topology server 12 determines not only the current actual topology of Hauptteil- contractor 1. It also determines whether and, if appropriate wel ⁇ che supplement station 2 includes the communication network. Furthermore, if present, the step S14 can be configured such that the stored actual topology 17 also includes the supplementary participants 2 and their coupling to the communication network. However, this is not mandatory. The supplemental participants 2 are irrelevant with respect to the question of whether a new determination of the communication planning 10 is required. For this reason, the step S13 gege ⁇ appropriate, designed accordingly.
  • step S13 the previous and the current actual topology 17, 17 'only checked for compliance, as far as the communica ⁇ tion of the main participants one another. In the context of step S13, therefore, step S13 does not proceed to step S4 if the current actual topology 17 'differs from the earlier actual topology 17 only with regard to the supplementary participants 2.
  • the topology server 12 can be designed with regard to its functionality as a full-fledged engineering system. Preferably, however, it is only able to determine and transmit the total communication planning 18 '. Therefore, it is preferably programmed such that the main part 1 ⁇ holders associated communication links 8 of it can not be changed. This is indicated in FIG 2, characterized in that an access of the processing device 7 is shown only in dashed lines on the relationship memory 9. Because the access as such is possible. However, it is only possible if a full-fledged engineering system is connected to the communication network. By contrast, the access is preferably not possible if only the topology server 12 is coupled to the communication network.
  • the topology server 12 is preferably programmed in such a way that, with regard to optional supplementary participants 2, their communication relationships from the topology server 12 are likewise not changeable.
  • step S3 is followed by a step S16.
  • step S16 the topology server 12 checks whether the communication relationships 8 assigned to the main users 1 can be realized by means of the current topology 17 'determined by the user. If the communication relations 8 are realizable, the topology server 12 proceeds to step S4. If the communication relationships 8 are unrealizable, the topology server 12 proceeds to a step S17. In step S17, the topology server 12 issues an error message to the operator via the human-machine interface 19.
  • steps S18 and S19 are furthermore arranged downstream of step S4.
  • step S18 the Topologieser- determined ver 12 on the basis of his known data of Merunikationsnet ⁇ zes - in particular a working cycle, the data to be transmitted, the communication links 8 and the communication plans 10 - a response time T, within which respectively transmitting at ⁇ falling data packets P from Main participant 1 are transmitted to the respective receiving main participant 1.
  • the reaction time T compares the topology server 12 in step S19 with a predetermined time limit T '.
  • step S20 the topology server 12 - analogous to the error message of step S17 - via the man-machine interface 19 a warning message to the operator.
  • the topology server 12 is preferably used in industrial
  • Controllers used for example at a ackpro ⁇ programmable logic controller (PLC), a numerical control (CNC), or a motion control controller. It can be designed as a separate device according to FIG. Preferably, however - see FIGS. 6 and 7 - the topology server 12 is assigned to one of the subscribers 1, 2 of the communication network. In particular, it is possible for the topology server 12 to communicate with the users only via the subscriber 1, 2 to whom it is associated Main participants 1 can communicate. For example, it can be integrated in the subscriber 1, 2 to which it is assigned.
  • the participant 1, 2, to which the topology server 12 is assigned is preferably one of the main participants 1. However, it may alternatively be assigned to one of the supplementary participants 2. As a subscriber to whom the topology server 12 is assigned, in particular the already mentioned human-machine interface 19 (see FIG. 6) or an input / output controller 21 of the industrial control (see FIG. 7) come into question.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

Un réseau de communication comporte des abonnés principaux (1), qui sont reliés entre eux selon une topologie réelle (17') actuelle. Il comporte en outre un serveur de topologie (12). Le serveur de topologie (12) est programmé de telle sorte qu'il contrôle si un évènement interne au réseau s'est produit, et si l'évènement interne au réseau s'est produit, il détermine automatiquement la topologie réelle (17') actuelle et les données de communication (18') dépendant de la topologie à l'appui de liaisons de communication (8) associées aux abonnés principaux (1), et il transmet automatiquement à chaque abonné principal (1) la partie (10), significative pour lui, des données de communication (18') dépendant de la topologie.
PCT/EP2007/058671 2006-09-13 2007-08-21 Réseau de communication avec des abonnés principaux et un serveur de topologie Ceased WO2008031695A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006042949.4 2006-09-13
DE102006042949A DE102006042949A1 (de) 2006-09-13 2006-09-13 Kommunikationsnetz mit Hauptteilnehmern und Topologieserver

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WO2008031695A1 true WO2008031695A1 (fr) 2008-03-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9178760B2 (en) 2010-10-18 2015-11-03 Phoenix Contact Gmbh & Co. Kg Method and apparatus for configuring network nodes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011011587B4 (de) 2011-02-17 2025-02-27 Phoenix Contact Gmbh & Co. Kg Portunabhängiges topologisch geplantes Echtzeitnetzwerk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315494C1 (de) * 1993-05-10 1994-09-29 Daimler Benz Ag Anordnung und Verfahren zur Programmierung wenigstens eines Kfz-Steuergeräts
DE19926206A1 (de) * 1999-06-09 2001-01-11 Daimler Chrysler Ag Fahrzeugelektrik-Konfigurationssystem
EP1289190A2 (fr) * 2001-08-31 2003-03-05 Audi Ag Configuration automatique d' un BUS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315494C1 (de) * 1993-05-10 1994-09-29 Daimler Benz Ag Anordnung und Verfahren zur Programmierung wenigstens eines Kfz-Steuergeräts
DE19926206A1 (de) * 1999-06-09 2001-01-11 Daimler Chrysler Ag Fahrzeugelektrik-Konfigurationssystem
EP1289190A2 (fr) * 2001-08-31 2003-03-05 Audi Ag Configuration automatique d' un BUS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9178760B2 (en) 2010-10-18 2015-11-03 Phoenix Contact Gmbh & Co. Kg Method and apparatus for configuring network nodes
EP2630751B1 (fr) * 2010-10-18 2018-11-21 Phoenix Contact GmbH & Co. KG Système de traitement et de transmission de données ayant un dispositif pour l'échange de données par PROFINET, dans lequel une topologie cible répondant à un ensemble d'informations pertinentes pour la configuration pour une variante particulière d'une installation ou d'une machine modulaire est générée

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