EP1665651A1 - Utilisation de services a l'interieur d'un reseau de communication a mecanismes internet et d'un systeme d'automatisation - Google Patents

Utilisation de services a l'interieur d'un reseau de communication a mecanismes internet et d'un systeme d'automatisation

Info

Publication number
EP1665651A1
EP1665651A1 EP03769211A EP03769211A EP1665651A1 EP 1665651 A1 EP1665651 A1 EP 1665651A1 EP 03769211 A EP03769211 A EP 03769211A EP 03769211 A EP03769211 A EP 03769211A EP 1665651 A1 EP1665651 A1 EP 1665651A1
Authority
EP
European Patent Office
Prior art keywords
services
service
communication network
automation system
service access
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
EP03769211A
Other languages
German (de)
English (en)
Inventor
Gert Anders
Hagen BÖHME
Robert GÖRSCH
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 EP1665651A1 publication Critical patent/EP1665651A1/fr
Ceased legal-status Critical Current

Links

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]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone
    • H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • 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
    • H04L2012/4026—Bus for use in automation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]

Definitions

  • the invention relates to a system and a method for using services within at least one communication network with internet mechanisms and at least one automation system, as well as a service access means for connecting an automation system to a communication network.
  • the unpublished DE 1 022 98 79 describes a data processing system with improved provision of services for the provision of functionalities.
  • the data processing system has at least one first service for activating and deactivating at least one second service.
  • services for providing functionalities can be implemented in particular as so-called web services.
  • Web service technology is becoming increasingly widespread on the Internet and is helping to transform the Internet from a user-centered information medium to an information and web service landscape that can be used directly by applications.
  • Standard Internet technologies HTTP, SOAP, WSDL, UDDI
  • HTTP, SOAP, WSDL, UDDI Standard Internet technologies
  • the invention has for its object the use of
  • a system for using services within at least one communication proposed network with Internet mechanisms and at least one automation system wherein components of the automation system are coupled to one another via a conventional fieldbus, a service access means being provided for connecting the conventional fieldbus to the communication network, the service access means being provided as a client for the services offered in the communication network , the service access means having transformation means which are provided for adapting a first communication protocol of the services to a second communication protocol of the fieldbus.
  • a method for using services within at least one communication network with Internet mechanisms and at least one automation system with components coupled to one another via a conventional fieldbus is proposed, in which method a service access means connects the conventional fieldbus to the communication network, the service access means as a client for those offered in the communication network Services functions and transform means of the service access means adapt a first communication protocol of the services to a second communication protocol of the fieldbus.
  • a service access means for connecting an automation system to a communication network with internet mechanisms, which is provided as a client for services offered in the communication network and which has transformation means which, in order to adapt a first communication protocol of the services to a second communication protocol of a component of the automation system, connects conventional ones Fieldbus are provided.
  • Automation systems usually have a complex structure.
  • the components of the automation Systems are networked via special communication systems (e.g. actuator sensor buses, field buses, Industrial Ethernet).
  • special communication systems e.g. actuator sensor buses, field buses, Industrial Ethernet
  • In parallel with the Internet in particular, there is a globally available and standardized communication network with Internet mechanisms, through which numerous services can be provided.
  • services for automation technology systems are made available in a flexible manner. These systems do not necessarily have to have an Internet architecture with the corresponding Internet mechanisms or protocols.
  • the flexible architecture allows services of the communication network with internet mechanisms to be transformed into the automation system with a subordinate conventional fieldbus beyond the limits of the communication network with internet mechanisms.
  • the invention makes it possible to commission services for automation systems from any location and to use the advantages of a widely distributed network.
  • a service access means is required for this, which establishes the connection between the services and the automation system.
  • this service access means is part of the automation system, i. H. it is integrated into the automation system as a component of the automation system. In this case, the number of components required in the system is reduced.
  • the communication network has at least one central registration means for providing information about at least some of the services.
  • the service access means has search means by means of which the central filing means can be addressed.
  • Web services use standard Internet protocols and mechanisms such as B. HTTP (HyperText Transfer Protocol), SOAP (Simple Object Access Protocol), WSDL (Web Service Description Language).
  • the service user is directed to a first service provider via the selection (manual or automated) of the desired web service.
  • the first service provider will generally need additional resources (e.g. database server). Any number of other service providers are therefore consulted to implement the service.
  • Automation systems can be coupled to different communication networks.
  • the communication network is an intranet.
  • Many different information processing devices can be connected to such an intranet, for example PCs, laptops, mainframes, web servers and many others. Some of these devices offer services that can also be used by the components of the automation system.
  • the various information processing devices can have client or server functionalities, and a combination of both functionalities is also possible in one device.
  • the automation system or the service access means can take on the role of both client and server during the course of the service if, according to a further advantageous embodiment of the invention, the service access means is also provided for the provision of further services in the communication network.
  • the method according to the invention can advantageously be used to carry out software updates for the components of the automation system via the Internet, in particular to carry out firmware updates. This means that the software of the components can be reloaded, updated or supplemented in a comfortable, largely automatic manner.
  • Show it: 1 shows a system for using services within a communication network with Internet mechanisms and an automation system
  • FIG. 2 shows a schematic representation of a system for using web services on the Internet by an automation system
  • FIG. 3 shows a schematic representation of a system for using a service for software update by an automation system
  • a conventional fieldbus 8 is understood to mean a fieldbus that is not intended for communication in accordance with standard Internet protocols.
  • the conventional fieldbus 8 of the automation system 5 is connected to the communication network 4 by means of at least one service access means 6.
  • the service access means 6 is connected to the communication network 4 via a coupling 9.
  • the service access means 6 is provided as a client for the services 1, 2 offered in the communication network 4.
  • the service access means 6 has transformation means 7, which are provided for adapting a first communication protocol of the services 1, 2 to a second communication protocol of the fieldbus 8.
  • the second communication protocol of the fieldbus 8 is the communication protocol used by the components 10 connected to the fieldbus 8 for handling communication via the fieldbus 8.
  • the communication network 4 in the exemplary embodiment according to FIG. 1 has a central registration means 3 for providing information about at least part of the services 1, 2.
  • the service access means 6 has search means 15, by means of which the central registration means 3 can be searched and addressed in the communication network 4.
  • the services 1, 2 and the central registration means 3 can be made available by means of any information-providing means, in the exemplary embodiment by means of the computers 11, 12 and 13.
  • the computers 11, 12, 13 are only indicated schematically here; Connections 14 coupled together.
  • the connections 14 can be connections on the Internet which are realized by the interaction of a large number of widely distributed communication participants and connections (not shown here).
  • the service access means 6 is also used to provide further services 17 in the communication network 4.
  • the service access means 6 basically provides a gateway between the underlying conventional fieldbus 8 and the communication network 4, e.g. B. the Internet.
  • the service access means 6 also has a connection to the communication network 4 (Internet / intranet) and software components that enable it to offer services in the communication network itself (e.g. web services) on the one hand and as Client can act for services / web services offered in the communication network 4.
  • Data or services that arrive at the service access means 6 via the latter route can be fed into the latter through its connection to the conventional field bus 8 after they have been prepared accordingly by means of the transformation means 7 (eg protocol adaptation, conversion to special services) of the fieldbus system, previous further data processing, etc.).
  • the service access means 6 can consist of pure hardware or a combination of hardware and software.
  • 2 shows a schematic representation of a system for using services in the form of web services on the Internet by an automation system.
  • the automation system 21 is connected to a conventional fieldbus 29 with a service access means 22.
  • service providers 23, 24, 25, service users 26 and a central registration means 27 with Internet connections 28 are coupled to one another.
  • a registration means 27 is e.g. B. a platform and programming language independent directory service according to the specification UDDI (Universal Description, Discovery and Integration).
  • UDDI Universal Description, Discovery and Integration
  • a service user in the automation system e.g. B. an automation component, which would like to use a service on the Internet or intranet 20, is directed to a suitable service provider 23 via a suitable selection routine, which runs automatically or manually.
  • the service provider 23 generally uses additional resources (e.g.
  • any number of other service providers 24, 25 are involved in realizing the service.
  • the roles of service providers and service users change within the components involved, without these mechanisms typical of a web service being visible to the actual service user in the automation system 21. This only has to do with the service requested by him, without having to deal with the details of the implementation via web service mechanisms.
  • the requested service must ultimately be effective in the automation system 21.
  • the service access means 22, which connects the web services and the automation system 21, is used for this purpose. provides. This service access means 22 can either be a separate component or also part of the automation system. In the first case, it is possible to use a web service in an existing automation system (with its own communication mechanisms / protocols).
  • the service access means 22 and / or a service provider 23-25 are part of the automation system.
  • the number of components required in the entire system is reduced, but these must then be integrated in the automation system.
  • FIG. 3 shows a schematic representation of a system for using a software update service by an automation system 31.
  • the automation system 31 is connected to a service access means 32 via a conventional fieldbus 39.
  • the service access means 32 is connected to Internet connections 38 with a plurality of service providers 33-36, central registration means 37 and service users 40, 41 in an Internet 30. These Internet participants each have the function of a client 42 and / or a server 43.
  • a system with the structural structure shown in FIG. 3 makes it possible to order services for the automation system 31 from any location and to use the advantages of a widely distributed network, in the exemplary embodiment of the Internet 30.
  • Automation systems 31 are usually coupled to different networks, more and more often to a local intranet or the Internet 30.
  • Many different information processing devices are connected or connected to these networks or in these networks, e.g. B. PCs, laptops, mainframes, web servers and the like. Some of these devices offer services that can also be used by automation devices.
  • the location of the service provider is irrelevant, since that
  • the various information processing devices can have client or server functionalities, whereby a combination of both functionalities is also possible.
  • a component of the automation system 31 connected to the fieldbus 39 in the automation system 31 uses the service access means 32 to send a request for a firmware update to the Internet 30.
  • the automation component finds a service provider 36 who offers the desired firmware update as a service .
  • the service provider 36 in turn uses other service providers 33-35, which in the exemplary embodiment provide the desired firmware.
  • the sequence of such a firmware update service is to be illustrated on the basis of FIG.
  • FIG. 4 shows a sequence example for a web service for firmware updates.
  • the respective communication steps between the communication partners involved in a communication network are shown schematically.
  • the communication partners each have the functionality of a server 53 and / or a client 52.
  • the example for the execution of a web service shows the use of the web service by any service user 50, but in particular by a service access means 32 according to FIG. 3, which includes this service in an automation component an automation system.
  • the service user 50 at any location connected to the communication network, in particular to the Internet, can be a person on a computer or an autonomously operating machine.
  • the service user 50 would like to use a web service for the firmware update and either knows the address of a central registry 57 or obtains this address by using a search engine 55.
  • User 50 searches a search query 60 for a registration means 57 to a search engine 55, which then transmits the results 61 found to the service user 50.
  • the service user then connects to one of the determined registration means 57, e.g. B. a registry server, and as a client directs a request 62 for a web service with the desired functionality (here: firmware update service) to the registry means 57.
  • the central registry means 57 receives an overview of possible service providers 56 as well as their addresses in the communication network and a brief description of the services offered.
  • the service user 50 selects one of the service providers 56 according to his own requirements and connects to this server.
  • the service user 50 makes a request 64 for a firmware update to the service provider 56 and provides the latter with the required information about the location to which the required data are to be delivered, e.g. B. an automation component in an automation system.
  • the service user 50 negotiates the details of the service execution (address of the module to be updated, details of the update) with the service provider 56.
  • the service provider 56 confirms the request of the service user 50 with an acknowledgment 65.
  • the service provider 56 may not yet have all the data (for example firmware update files) which are and must be necessary for the execution of the service offered by him get them from another web service first.
  • he proceeds in an analogous manner: he now searches in the function of an autonomous client by means of a request 66 to a search engine 55 for a registration means 57, e.g. B. a directory.
  • the search engine 55 transmits the found results 67 to the service provider 56.
  • the service provider 56 then uses a request 68 to request a suitable service (in this case: firmware holder) from the registry 57 and receives the information from the registry 57 as a result 69. where and how such a service is available.
  • the service provider 56 requests as a client by means of a request 70 to the required data from the firmware-holding server of the found further service provider 54.
  • the further service provider 54 transmits the information 71 offered to the service provider 56 as a server. After the service provider 56 has all the data necessary for executing the web service for the firmware update, he starts the offered service and informs the service user 50 by means of a message 72 about the status of the processing of the web service.
  • the invention thus relates to a system and a method for using services 1, 2 within at least one communication network 4 with internet mechanisms and at least one automation system 5, as well as a service access means 6 for connecting an automation system 5 with a communication network 4.
  • a system for improving Use of services 1, 2 within at least one communication network 4 with internet mechanisms and at least one automation system 5 is proposed, components 10 of the automation system 5 being coupled to one another via a conventional field bus 8, with a service access means 6 for connecting the conventional field bus 8 to the communication network 4 is provided, the service access means 6 being provided as a client for the services 1, 2 offered in the communication network 4 and the service access means 6 including transformation means 7. points which are provided for adapting a first communication protocol of the services 1, 2 to a second communication protocol of the fieldbus 8.
  • This technology allows both direct communication between applications (the so-called services) and the construction of applications from distributed components (again services), ie loosely connected web services can work together to perform a task.
  • the web service technology scales with the help of standards such as XML and SOAP from local communication to communication via the intranet / Internet. It is the basis for distributed and integrated Internet applications, using existing standards (eg W3C, IETF standards such as HTTP, XML, XML Schema, XML Data Types, etc.) or new ones together with W3C, IETF defined standards such as SOAP, WSDL, UDDI.
  • Web service interfaces are described by meta information (methods, parameters (names and types)), usually in WSDL (Web Service Description Language). This complete interface description is sufficient to call up the web services. It describes the end point (port) at which the respective web service can be called and is particularly useful for automatic communication with web services. Web services are easy to access, blurring the lines between local APIs and web services ("Web APIs"). Access is just as easy as when creating and using a local object. The web service technology is therefore the basis for loosely coupled applications. It is characterized by message-based communication and scalability through statelessness. Loose coupling (e.g. with SOAP) offers the advantages of good compatibility with changes in the implementation of client and server and robust communication (port-based, message-based, asynchronous).
  • WSDL Web Service Description Language
  • a client packs messages in self-describing packets (messages) and sends them over the respective communication connection.
  • message format used on the line.
  • the only assumption is that the recipient understands the message. No assumptions are made about what happens after the message is received or between the sender and recipient.
  • Common web services have the following properties: They are accessible via a communication network such as the Internet / intranet and have an XML interface. Information about web services is stored in a registry so that the web services can be localized via it. They communicate using XML messages via web protocols and support loosely coupled connections between systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer And Data Communications (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

L'invention concerne un système et un procédé pour l'utilisation de services (1, 2) à l'intérieur d'au moins un réseau de communication (4) à mécanismes Internet et d'au moins un système d'automatisation (5), ainsi qu'un moyen d'accès (6) à des services servant à relier un système d'automatisation (5) à un réseau de communication (4). L'invention propose un système pour l'utilisation améliorée de services (1, 2) à l'intérieur d'au moins un réseau de communication (4) à mécanismes Internet et d'au moins un système d'automatisation (5), ce système étant caractérisé en ce que des composantes (10) du système d'automatisation (5) sont couplées entre elles au moyen d'un bus de terrain conventionnel (8), en ce qu'un moyen d'accès (6) à des services sert à relier le bus de terrain conventionnel (8) au réseau de communication (4), en ce que le moyen d'accès (6) à des services est réalisé en tant que client pour les services (1, 2) proposés dans le réseau de communication (4) et en ce que le moyen d'accès (6) à des services présente des moyens de transformation (7) servant à adapter un premier protocole de communication des services (1, 2) à un deuxième protocole de communication du bus de terrain (8).
EP03769211A 2003-09-25 2003-09-25 Utilisation de services a l'interieur d'un reseau de communication a mecanismes internet et d'un systeme d'automatisation Ceased EP1665651A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2003/003202 WO2005041490A1 (fr) 2003-09-25 2003-09-25 Utilisation de services a l'interieur d'un reseau de communication a mecanismes internet et d'un systeme d'automatisation

Publications (1)

Publication Number Publication Date
EP1665651A1 true EP1665651A1 (fr) 2006-06-07

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EP03769211A Ceased EP1665651A1 (fr) 2003-09-25 2003-09-25 Utilisation de services a l'interieur d'un reseau de communication a mecanismes internet et d'un systeme d'automatisation

Country Status (5)

Country Link
US (1) US7953107B2 (fr)
EP (1) EP1665651A1 (fr)
AU (1) AU2003277815A1 (fr)
DE (1) DE10394339D2 (fr)
WO (1) WO2005041490A1 (fr)

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Also Published As

Publication number Publication date
WO2005041490A1 (fr) 2005-05-06
DE10394339D2 (de) 2006-08-17
US7953107B2 (en) 2011-05-31
US20070112976A1 (en) 2007-05-17
AU2003277815A1 (en) 2005-05-11

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