WO2016102194A1 - Dispositif et procédé de fonctionnement d'un appareil de terrain pourvu d'un serveur web - Google Patents

Dispositif et procédé de fonctionnement d'un appareil de terrain pourvu d'un serveur web Download PDF

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Publication number
WO2016102194A1
WO2016102194A1 PCT/EP2015/079289 EP2015079289W WO2016102194A1 WO 2016102194 A1 WO2016102194 A1 WO 2016102194A1 EP 2015079289 W EP2015079289 W EP 2015079289W WO 2016102194 A1 WO2016102194 A1 WO 2016102194A1
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WO
WIPO (PCT)
Prior art keywords
server
field device
data
client
request
Prior art date
Application number
PCT/EP2015/079289
Other languages
German (de)
English (en)
Inventor
Holger Seguin
Florian Schorradt
Original Assignee
Endress+Hauser Wetzer Gmbh+Co. Kg
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 Endress+Hauser Wetzer Gmbh+Co. Kg filed Critical Endress+Hauser Wetzer Gmbh+Co. Kg
Publication of WO2016102194A1 publication Critical patent/WO2016102194A1/fr

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/054—Input/output
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/15—Plc structure of the system
    • G05B2219/15038—Internet, tcp-ip, web server see under S05B219-40
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25202—Internet, tcp-ip, web server : see under S05B219-40
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25428—Field device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34038—Web, http, ftp, internet, intranet server
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the invention relates to a method for operating a field device and an arrangement comprising a field device.
  • Such field devices can serve, for example, for controlling, monitoring and displaying a process variable.
  • a multi-channel process data acquisition device has become known, to which one or more sensors can be connected and which serves for storing and / or processing one or more measurement signals, which measurement signal or which measurement signals are transmitted from one or more of the sensors to the process data acquisition device.
  • field devices have become known which can be operated via a web browser. Such a possibility is described, for example, in the patent application US 2008/0082637 A1.
  • an automation device is configured by means of an operating tool, which operating tool is connected via the Internet with a web server in a gateway.
  • the object of the invention is to specify a resource-saving option for retrieving data, in particular field-device-related data, from a field device. This object is achieved by a method for operating a field device and an arrangement comprising a field device.
  • the object is achieved by a method for operating a field device, in particular a multi-channel process data acquisition device, wherein the field device comprises a first server, preferably a first web server, wherein a data request from a first client, preferably a
  • Web client for example. From an operating unit, is provided to the first server of the field device, wherein the data request is forwarded by means of the first server of the field device to a second, preferably external, web server, and the requested data from the second server, for example electronic database, retrieved and transmitted to the first server of the field device, wherein the retrieved data from the first server of the field device (subsequently) are transmitted to the client.
  • the method is preferably used for operating the field device or for retrieving data relating to the field device or for understanding the settings or the mode of operation, or relating to the mode of operation of the field device
  • the field device is, for example, a sensor or an actuator or a multi-channel process data acquisition device. Furthermore, every process comes close
  • the field device has an implemented first server, for example a web server - a server that uses the http or https protocol.
  • the web server can, for example, be implemented in the firmware or a functional module which is operatively connected to the firmware, that is to say it can exchange this data.
  • this first server it is also preferably a so-called. Proxy server over the
  • connection to another server for example.
  • Said second, preferably external, server can be produced.
  • a request to the first server, for example from a client, is therefore also addressed to this first server.
  • the first server can now eg.
  • Field device is located, so finds an internal storage unit. If the requested data is present there, the server can transmit a corresponding response and / or the corresponding data itself to the client.
  • the data can be transmitted between the client and the first server preferably in the form of telegrams. However, if the requested data does not exist in the field device, The first server can either process the request, for example make a protocol conversion and be forwarded, or it can forward the request directly to the second server. However, in both cases it may be necessary to address the data request to the other, second server.
  • the client may be an application that is executed on the operating device and by means of which direct or indirect, for example by means of another application, queries can be made to the server on the field device.
  • the second server is preferably likewise a web server which is at least logically separated from the first server and preferably in communication with the first server via the Internet.
  • the (electronic) database are then retrieved from this storage unit and transmitted to the first server. From there, the retrieved data can be formatted or forwarded directly to the client.
  • Field device is thus used as a mediator of the requests receives and then retrieves its own address from the second server. This can be done as described by a simple readdressing or processing of the data request.
  • the data retrieved from the second server may be stored in the memory unit of the field device after being received by the first server.
  • a second data request may be made by the client through which further data is retrieved from the second server.
  • This further data can then likewise be written into the memory unit of the field device.
  • the data obtained by means of the first data request are overwritten and, for example, the data obtained by means of the second request are instead written into the memory unit.
  • the data received from the second server may be field device related data.
  • a data request from the client may also be the execution of one or more arithmetic operations and the processing of data transmitted from the field device to the second server.
  • one or more identifiers may be provided for the
  • Operation of the field device is located, and the field device to be present.
  • an identifier is then transmitted from the client to the field device.
  • the field device can then retrieve the information associated with this identifier from the second server.
  • the identifier may be forwarded to the second server where the associated data is stored.
  • the identifier can consist of a numerical value.
  • information associated with particular field device-related information on the field device can be linked to a parameter and its value by means of the indicator.
  • the assigned identifier is transmitted to the second (external) server and the associated information is transmitted to the field device.
  • the field device can then transmit this information to the operating device or the client application on it.
  • Storage unit that can be accessed through the second server to be outsourced. These data may be parameters or
  • Parameter names, error texts, help texts, menu names and in the identifier to one, preferably alphanumeric, in particular encrypted,
  • Parameter identification is. Furthermore, it may be one or more
  • a plurality of field devices are connected to the second server or are connectable and have access to the second server.
  • a central data management and data maintenance for example by the manufacturer of
  • Field devices are performed.
  • the data stored in an external storage device can then be edited or provided without each one
  • Field device needs updating. Furthermore, it becomes possible for a plurality of different clients to connect to the first server on the field device simultaneously or successively. Inquiries from these two clients can then be managed by the first server and the requested data can be transferred back to the respective clients. It may be provided in particular that a first request from the first client and a second request is made by the second client.
  • the respective requests may include an identification of the respective client or operating device or user of the operating device used. This makes it possible, for example, that although the same identifier is used to obtain certain data or data of a particular content. However, due to the identification, for example, different
  • Parameter description or operating instructions for example, in different languages, transferred.
  • the field device thus has an internal
  • Memory unit in which, for example, field device-related data, in particular in a first language, particularly preferably in a first number of different languages, are stored or stored.
  • the field device may have a certain amount of data and information that the field device uses at the factory, i. before delivery to a customer.
  • field-device-related data are stored in the external database, preferably in a second language, particularly preferably in a second number of different languages.
  • these data may be editable and retrievable by a plurality of field devices, in particular field devices having a server or web server.
  • the request in the event that the requested data is not stored in the device-internal memory unit, the request is forwarded to the external server.
  • the requested data in the case that the requested data is / are stored in the internal memory unit, the requested data is read from the internal memory unit and transmitted to the client by means of the first server of the field device.
  • the requested data is / are identified by an identifier, such as, for example, a unique numbering associated with the requested data.
  • Corresponding indicators are, for example, in the field device and an operating device or an external database which can be accessed by means of the second server stored.
  • the request includes this
  • the data are parameters or parameter names, error texts, help texts,
  • Menu names and the identifier to one, preferably alphanumeric, in particular encrypted, parameter identification.
  • the web server of the field device is in a first communication connection, for example via the Internet Protocol, with the web client is or is this first communication connection established, and wherein the web server of the field device in a second communication connection, for example the Internet Protocol, with the external web server is or is this second communication connection established, in particular without the external web server with the web client in a direct communication connection.
  • a plurality of web clients are parallel to one another, preferably simultaneously, in a communication connection with the web server of the field device.
  • a first request is made to the web server of the field device by a first of these multiple web clients, wherein a second request is made to the web server of the field device by a second of these several web clients, the first request being retrieved by retrieving data is answered from the field device internal memory unit, wherein the second request is answered by retrieving data from an external electronic database by means of the external server.
  • the external electronic database is a database to which, for example, the
  • Field device manufacturer has exclusive access.
  • a plurality of field devices are in communication with the external web server and access to the electronic database via the external web server.
  • the object is achieved by an arrangement comprising a field device with a web server, an external web server and a web client for carrying out the method according to one of the preceding embodiments.
  • the arrangement can thus also comprise a plurality of field devices, each having a communication link with the external, second server.
  • FIG. 1 shows a plurality of field devices F1, F2, F3, which are connected in a system via a field bus FB to a process controller C.
  • a field bus access unit G also called Gateway, connected to the fieldbus FB.
  • the process control arrangement P has a first bus system B1, which connects the units of the process control C. To the bus system B1, a first arithmetic unit is connected.
  • the process controller C is used by a plant operator to control the system.
  • the fieldbus FB may, for example, be a Profibus DP fieldbus to which field devices F1, F2, F3, RIO are connected.
  • the fieldbus FB in turn is connected, for example via a segment coupler or here a so-called.
  • another fieldbus such as HART or Fieldbus FF can be used.
  • a second bus system B2 is provided, on which in the shown
  • a computing unit RE2 is connected to the
  • the second bus system B2 forms a higher communication level to the fieldbus FB.
  • the second bus system B2 may, for example, be a corporate network.
  • the field devices can be accessed from the second bus system B2, for example in order to operate them or to retrieve data from the field device F1, F2, F3.
  • there enable operating programs such as plant asset management to diagnose and / or visualize the field devices F1, F2, F3.
  • the fieldbus interface G is provided via which the second bus system B2 is connected to the fieldbus.
  • the fieldbus interface G thereby enables the connection of the second bus system B2 with the field devices F1, F2, F3. This enables communication between the higher-level second bus system B2 and the field devices F1, F2, F3.
  • the field devices F1, F2, F3 can be addressed, for example, via an addressing with which, for example, one or more telegrams are provided.
  • the fieldbus FB can thus be accessed via an interface of the control unit C as well as via the fieldbus interfaces G. Cyclic queries can be made by the control unit C and acyclic queries on the first fieldbus FB by the first fieldbus interface G. For example. Data from the fieldbus can be heard or transmitted via the fieldbus by the computer unit RE2 of the bus system B2 via the fieldbus interface G, in particular, for example.
  • Diagnostic information can be retrieved from one of the field devices F1, F2, F3.
  • Figure 2 shows a schematic representation of a field device, the example.
  • the field device may be, for example, a sensor with a sensor MA, is detected by a physical and / or chemical measured variable and converted into an electrical signal.
  • This signal can be processed, for example, by means of a measured-value-processing logic, such as, for example, a microprocessor or a microcontroller.
  • This logic can be part of a firmware Fl of the field device F in particular.
  • the firmware F1 can also be connected to a web server C1. However, this web server can also be part of the firmware, ie integrated into it.
  • This communication connection X3 can be, for example, a field-device-internal bus to which also a memory unit which is located in the Field device is arranged, is connected. It is also possible that the storage unit (only) can be accessed via the web server.
  • the field device can also have a, for example, wired, separate interface (for example, in addition to a fieldbus interface), via which the field device can be connected to an operating device.
  • a connection for wireless data transmission for example via radio, in particular WLAN, is also possible.
  • connection via Ethernet, wired or wireless is also a connection via Bluetooth or a fieldbus system or an interface that gem.
  • a fieldbus protocol is conceivable.
  • the device can be accessed via several tools (eg FieldCare, Field Device Manager, Web server, external tools, ..). If several field devices, for example, read access to the external memory (database), there are no problems. The requests are processed one after the other. If several field devices or HMI devices attempt to write to the external memory (database), the corresponding authorization must first be checked. If the write permission exists, the data in the external database is changed and made available in a new query by the field device or the HMI device. The field devices are not informed that data has changed. Each client who accesses the field device is assigned a session ID, for example. If the maximum number of session ID, e.g. 10 users at the same time, reached, for example, a hint appears. This avoids that the device interrupts the measurement value registration by too many requests.
  • the actual parameterization (changing the following the maximum number of session ID, e.g. 10 users at the same time, reached, for example, a hint appears. This avoids that the device interrupts the measurement value registration by too many requests
  • Field device settings can also, for example, be limited to a user.
  • An operation or generally a data exchange can then take place via an operating device which can be connected to a (communication) interface of the field device.
  • This interface can then be used to operate the field device via the web server by means of the operating device.
  • a client in particular a web client, can be provided on the operating device, which is, for example, a handheld operating device. Via this client, a user can transmit data to the field device or retrieve it from there via the server C1.
  • the client can request a data via a corresponding interface of the Transferring the HMI device to the field device, the data request can be processed by the Web server C1 by either the requested data from the storage unit in which it may, for example, be a database can be retrieved and transmitted to the client.
  • the data request can, for example, in the case that the requested data is not present in the memory unit S1 (or also generally) are forwarded to the server C2.
  • For identification of the requested data can, for example, a
  • Identifier in the form of a numerical or other value.
  • the interface between the operating device BG and the field device F may be, for example, an Ethernet interface, in particular via an "RJ-45" or "RJ45” plug / socket.
  • the field device F can also have a further interface via which the field device can be in communication with the second, external server.
  • This communication connection can also be an Ethernet connection.
  • this connection exists at least in part via the Internet.
  • the server C2 can also be located far away from the field device F. It is also possible for the data request from the HMI device and the forwarding to the second (external) server from the first server to take place via the same (hardware-based) interface but, for example, via different data channels.
  • the first server then acts as a kind of client for the second, external server, for example in the case of
  • the data request from the client on the HMI device can be forwarded to the server C2.
  • a simple readdressing or even a protocol conversion can take place. It may, for example, be dependent on the protocols used for communication via the connections V1 and V2, respectively, if protocol conversion is required.
  • the identifier transmitted from the client to the field device or the server C1 can be further transmitted to the server C2.
  • the server C2 can retrieve the requested data from the memory unit S2, which, for example, can also be a database.
  • the data retrieved from the memory unit S2 can then be transmitted to the client via the connection V2 and via the server C1.
  • This can also be a direct forwarding, a caching of the data from the database S2 and / or a readdressing or further processing by means of the firmware FL or another Data processing unit of the field device F done.
  • the data thus requested by means of the data query of the client CL are then retrieved from the server C2 or the memory unit S2.
  • Memory unit C2 to provide, without that in each of the field devices must be edited individually. Instead, it is sufficient to edit the memory unit S2 or the server C2.
  • the data located in the storage unit S2 may, for example, be information that is the same information in different languages. It is also possible to provide user-specific settings remotely which otherwise would not have been accommodated in the limited memory unit S1. It is essential to save in the field device: The values of the parameters
  • This data can be stored in the field device, for example, together with one or more flags that serve as identifiers.
  • This data can be stored, for example, in a separate memory area.
  • the description of the data itself (parameter name, help text, ...) are only marked with an ID, a flag or another identifier.
  • the firmware reads out the corresponding data in the set language. This can, as described above, be carried out by forwarding the data request from the HMI device to the second (external) server.
  • the data associated with the identifier can then in turn be transmitted by the field device to the operating device or the client application on the operating device.
  • field device-related data not only via the field device or the HMI device itself but e.g. also be carried out via an external application and then distributed centrally to various field devices.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quality & Reliability (AREA)
  • Computer And Data Communications (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner un appareil de terrain (F) qui comprend un premier serveur Web (C1) et une unité de mémorisation interne (S1). Pour interroger des données de l'appareil de terrain (F), un client (CL) dans un appareil de commande (BG) envoie une requête au premier serveur Web (C1) par le biais de la première liaison de communication (VI). Le premier serveur Web (C1) transmet les données au client (CL) si les données contenues sont présentes dans l'unité de mémorisation interne (S1). Dans le cas contraire, le premier serveur Web (C1) transmet la requête au second serveur Web (C2) par le biais de la seconde liaison de communication (V2) qui lit les données dans une unité de mémorisation externe (S2) et les envoie au premier serveur Web (C1). Le premier serveur Web (C1) transmet ensuite les données au client (CL). Ainsi, il est possible de transférer des données et des fonctions de l'appareil de terrain (F) sur un second serveur (C2) pourvu d'une unité de mémorisation, ou base de données, externe (S2). Les données peuvent être, par exemple, des noms de paramètres, des textes d'erreur, des textes d'aide et les noms de menu dans différentes langues. Les valeurs des paramètres qui affectent la performance de mesure (entrées) ou la délivrance (sorties) doivent être mémorisées dans l'unité de mémorisation interne (S1) de l'appareil de terrain (F).
PCT/EP2015/079289 2014-12-23 2015-12-10 Dispositif et procédé de fonctionnement d'un appareil de terrain pourvu d'un serveur web WO2016102194A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014119515.9A DE102014119515A1 (de) 2014-12-23 2014-12-23 Verfahren zum Betreiben eines Feldgerätes sowie Anordnung umfassend ein Feldgerät
DE102014119515.9 2014-12-23

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WO2016102194A1 true WO2016102194A1 (fr) 2016-06-30

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Publication number Priority date Publication date Assignee Title
CN108985020A (zh) * 2017-05-31 2018-12-11 克洛纳测量技术有限公司 与现场测量设备安全地通信的方法和相应的现场测量设备
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