WO2004042674A1 - Field device for process automation for recording and/or influencing a process variable, and comprising at least two communications interfaces - Google Patents

Field device for process automation for recording and/or influencing a process variable, and comprising at least two communications interfaces Download PDF

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Publication number
WO2004042674A1
WO2004042674A1 PCT/EP2003/012114 EP0312114W WO2004042674A1 WO 2004042674 A1 WO2004042674 A1 WO 2004042674A1 EP 0312114 W EP0312114 W EP 0312114W WO 2004042674 A1 WO2004042674 A1 WO 2004042674A1
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Prior art keywords
field device
influencing
fieldbus
field
standard
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PCT/EP2003/012114
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German (de)
French (fr)
Inventor
Marc Baret
Manfred Eckert
Stefan Maier
Andreas MÖLLER
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Endress + Hauser Gmbh + Co. Kg
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Priority to AU2003276219A priority Critical patent/AU2003276219A1/en
Publication of WO2004042674A1 publication Critical patent/WO2004042674A1/en

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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
    • G05B19/418—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
    • 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
    • G05B19/04—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
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25012—Two different bus systems
    • 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
    • G05B2219/25014—Fieldbus general name of bus connected to machines, detectors, actuators
    • 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
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25455—Buscouple interface can be integrated in actuator
    • 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
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31121—Fielddevice, field controller, interface connected to fieldbus
    • 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
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31124—Interface between communication network and process control, store, exchange data
    • 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
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31131—Field device with gateway functions for communication with pc and other field devices
    • 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
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31135—Fieldbus
    • 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

  • Field device for process automation for acquisition and / or
  • the invention relates to a field device for process automation for recording and / or influencing a process variable with at least two communication interfaces.
  • Field devices are often used in automation technology to record and / or influence process variables. Examples of such field devices are fill level measuring devices, mass flow meters, pressure meters, temperature meters, etc., which record the corresponding process variable fill level, mass flow, pressure or temperature. These field devices are also referred to as sensors. In addition to sensors, there are also field devices, so-called actuators, which, for. B. regulate the flow of a liquid in a pipe section as valves or pumps that serve to fill containers. Actuators influence the respective process variable flow, level, temperature etc.
  • the fieldbus is used for digital data communication with control units or control systems or other field devices.
  • Programmable logic controllers that control the process flow are often used as control units. In these control units, the measured values of the various sensors are evaluated or monitored and the actuators are controlled accordingly.
  • the fieldbuses are often still connected to higher-level communication networks via these controls or gateways, which are used for data communication with control systems (Siemens Simatic S7, Fisher Rosemount Delta V, ABB Symphony) and possibly also with business systems (e.g. SAP R3).
  • the process flow is monitored and visualized in a control system.
  • the control system also serves to engineer the various field devices. Often, not only one bus is used at the field level, but different buses with different bus protocols. One reason for this is that each fieldbus now allows a limited cable length and thus field devices that are relatively far apart cannot be connected to each other via every fieldbus. Another reason for using different fieldbuses is their use in potentially explosive areas. Not every fieldbus can be used in Ex areas. Another reason for different buses is the data rate, which is relatively low for field buses.
  • the data communication on the different buses takes place according to different protocols. Therefore gateways are necessary as connections between the buses. A protocol conversion to the protocols used in the respective buses takes place in the gateways.
  • a gateway When using two different buses, a gateway is therefore always required as a connection. Since the gateway is a separate device that usually has to be installed in a cabinet, a complex installation is necessary.
  • the object of the invention is to provide a field device for process automation for recording and / or influencing a process variable with two communication interfaces, which does not have the disadvantages mentioned above and which is particularly easy to install and inexpensive.
  • the essential idea of the invention is to provide two communication interfaces for two different buses in a field device, the protocol conversion for data to be transmitted between the two buses taking place in the field device itself. An additional gateway is therefore no longer necessary.
  • Fig. 1 shows a schematic representation of an automation system with two field buses that are connected via a gateway.
  • Fig. 2 shows a schematic representation of an automation system with two field buses without a gateway connection.
  • Fig. 3 shows a schematic representation of a field device with two communication interfaces.
  • FIG. 1 shows a schematic representation of a conventional automation system in which two buses, a field bus FB1 and a further data bus FB2 are connected to one another via a gateway G.
  • the fieldbus FB1 is connected to three field devices F1, F2 and F3.
  • Field devices F essentially consist of a transmitter T1, T2, T3 and a sensor element S1, S2, S3.
  • the sensor element S3 is not arranged directly on the transmitter T3 but at the end of a longer connecting line L3.
  • FIG. 2 shows a schematic representation of an automation system corresponding to FIG. 1 with two buses FB1 and FB2 but without a separate one Gateway.
  • the field device F1 ' is directly connected to the fieldbus FB1 and the bus FB2.
  • Fig. 3 shows a schematic representation of a field device here F1 ' with two communication interfaces K1 and K2, which are used for connection to the respective buses FB1 and FB2.
  • the two communication interfaces K1 and K2 are each connected to a microcontroller MC.
  • the sensor element S1 is used to record a process variable (e.g. pressure, temperature, level or flow). It is connected to the microcontroller MC via an A / D converter A / D.
  • a memory S (program memory) and an EEPROM for non-volatile data (parameters) are provided as memory elements of the field device F1 'and are likewise connected to the microcontroller MC.
  • a display D which is also connected to the microcontroller MC, serves to display and operate the field device F1 ' .
  • the field device is supplied with voltage via a separate power supply unit SV, which is fed either via a fieldbus or separately via a supply connection.
  • the bus FB2 is used to connect a field device (for example F1) to a programmable logic controller PLC.
  • a field device for example F1
  • a programmable logic controller PLC a field device
  • the following known standards are conceivable as a possible combination of the two buses FB1 and FB2: FB1: HART - FB2: Profibus DP, Profibus PA, Fieldbus Foundation H1, Fieldbus Foundation HSE, Ethernet, TCP / IP, GSM, Bluetooth FB1: Profibus PA- FB2: Profibus DP, Fieldbus Foundation H1, Fieldbus Foundation HSE FB1: Fieldbus Foundation H1 - FB2: Fieldbus Foundation HSE, Profibus DP
  • the functioning of the field device according to the invention is described in more detail below.
  • the field device F1 ' communicates in a known manner with the programmable logic controller PLC via the communication interface K2 and the fieldbus FB2.
  • the corresponding data in the respective protocol is sent to the field device F1 ' via the bus FB1.
  • the protocols are implemented accordingly in the field device F1 'and the data is transmitted on the bus FB1 to the respective field device F2 or F3.
  • the data communication between field device F2 or F3 and the programmable logic controller PLC takes place in the opposite way.
  • the essential idea of the invention is that the protocol conversion necessary when two buses are connected takes place in a field device.

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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)
  • Programmable Controllers (AREA)
  • Small-Scale Networks (AREA)

Abstract

A field device (F1') for process automation for recording and/or influencing a process variable is provided with at least two communications interfaces K1 and K2. Communications interface K1 serves for connecting to a first field bus, and communications interface K2 serves for connecting to a second field bus. A protocol conversion for the data, which are transmitted between both field buses FB1 and FB2, ensues inside the field device. An additional gateway for connecting both field buses is no longer necessary.

Description

Feldgerät für die Prozessautomatisierung zum Erfassen und/oder Field device for process automation for acquisition and / or
Beeinflussen einer Prozessvariablen mit mindestens zweiInfluencing a process variable with at least two
KommunikationsschnittstellenCommunication interfaces
Die Erfindung betrifft ein Feldgerät für die Prozessautomatisierung zum Erfassen und/oder Beeinflussen einer Prozessvariablen mit mindestens zwei Kommunikationsschnittstellen.The invention relates to a field device for process automation for recording and / or influencing a process variable with at least two communication interfaces.
In der Automatisierungstechnik werden vielfach Feldgeräte eingesetzt, die zum Erfassen und/oder Beeinflussen von Prozessvariablen dienen. Beispiele für derartige Feldgeräte sind Füllstandsmessgeräte, Massendurchflussmesser, Druckmesser, Temperaturmesser etc., die die entsprechende Prozessvariable Füllstand Massedurchfluss, Druck bzw. Temperatur erfassen. Diese Feldgeräte werden auch als Sensoren bezeichnet. Neben Sensoren gibt es noch weiter Feldgeräte, sogenannte Aktoren, die z. B. als Ventile den Durchfluss einer Flüssigkeit in einem Rohrleitungsabschnitt regeln oder Pumpen die zum Befüllen von Behältern dienen. Aktoren beeinflussen die jeweilige Prozessvariable Durchfluss, Füllstand, Temperatur etc..Field devices are often used in automation technology to record and / or influence process variables. Examples of such field devices are fill level measuring devices, mass flow meters, pressure meters, temperature meters, etc., which record the corresponding process variable fill level, mass flow, pressure or temperature. These field devices are also referred to as sensors. In addition to sensors, there are also field devices, so-called actuators, which, for. B. regulate the flow of a liquid in a pipe section as valves or pumps that serve to fill containers. Actuators influence the respective process variable flow, level, temperature etc.
Moderne Feldgeräte besitzen normalerweise eineModern field devices usually have one
Kommunikationsschnittstelle über die sie mit einem Feldbus verbunden sind. Der Feldbus dient zur digitalen Datenkommunikation mit Steuereinheiten bzw. Leitsystemen oder anderen Feldgeräten.Communication interface via which they are connected to a fieldbus. The fieldbus is used for digital data communication with control units or control systems or other field devices.
Als Steuereinheiten werden häufig speicherprogrammierbare Steuerungen (SPS) eingesetzt, die den Prozessablauf steuern. In diesen Steuereinheiten werden die Messwerte der verschiedenen Sensoren ausgewertet bzw. überwacht und die Aktoren entsprechend angesteuert. Häufig sind die Feldbusse noch über diese Steuerungen bzw. über Gateways mit übergeordneten Kommunikationsnetzwerken verbunden, die zur Datenkommunikation mit Leitsystemen (Siemens Simatic S7, Fisher Rosemount Delta V, ABB Symphony) und evtl. auch mit Business Systemen (z. B. SAP R3) dienen.Programmable logic controllers (PLCs) that control the process flow are often used as control units. In these control units, the measured values of the various sensors are evaluated or monitored and the actuators are controlled accordingly. The fieldbuses are often still connected to higher-level communication networks via these controls or gateways, which are used for data communication with control systems (Siemens Simatic S7, Fisher Rosemount Delta V, ABB Symphony) and possibly also with business systems (e.g. SAP R3).
In einem Leitsystem wird der Prozessablauf überwacht und visualisiert. Das Leitsystem dient auch zum Engineering der verschiedenen Feldgeräte. Häufig wird auf der Feldebene nicht nur ein Bus eingesetzt, sondern verschiedene Busse, mit unterschiedliche Bus-Protokollen. Ein Grund hierfür liegt darin, dass jeder Feldbus nun eine beschränkte Kabellänge erlaubt und somit relativ weit auseinanderliegende Feldgeräte nicht über jeden Feldbus miteinander verbunden werden können. Ein weiterer Grund für den Einsatz unterschiedlicher Feldbusse ist die Verwendung in explosionsgefahrdeten Bereichen. Nicht jeder Feldbus kann in Ex-Bereichen eingesetzt werden. Ein weiterer Grund für unterschiedliche Busse ist die Datenrate, die bei Feldbussen relativ gering ist.The process flow is monitored and visualized in a control system. The control system also serves to engineer the various field devices. Often, not only one bus is used at the field level, but different buses with different bus protocols. One reason for this is that each fieldbus now allows a limited cable length and thus field devices that are relatively far apart cannot be connected to each other via every fieldbus. Another reason for using different fieldbuses is their use in potentially explosive areas. Not every fieldbus can be used in Ex areas. Another reason for different buses is the data rate, which is relatively low for field buses.
Die Datenkommunikation auf den verschiedenen Bussen erfolgt nach unterschiedlichen Protokollen. Deshalb sind Gateways als Verbindungen zwischen den Bussen notwendig. In den Gateways erfolgt eine Protokollumsetzung auf die in den jeweiligen Bussen verwendeten Protokolle.The data communication on the different buses takes place according to different protocols. Therefore gateways are necessary as connections between the buses. A protocol conversion to the protocols used in the respective buses takes place in the gateways.
Bei der Verwendung zweier unterschiedlicher Busse ist deshalb immer ein Gateway als Verbindung notwendig. Da es sich bei dem Gateway um ein separates Gerät handelt, das in der Regel in einem Schallschrank eingebaut werden muss, ist eine aufwendige Installation notwendig.When using two different buses, a gateway is therefore always required as a connection. Since the gateway is a separate device that usually has to be installed in a cabinet, a complex installation is necessary.
Aufgabe der Erfindung ist es, ein Feldgerät für die Prozessautomatisierung zum Erfassen und/oder Beeinflussen einer Prozessvariablen mit zwei Kommunikationsschnittstellen anzugeben, das die oben genannten Nachteile nicht besitzt und das insbesondere einfach zu installieren und kostengünstig ist.The object of the invention is to provide a field device for process automation for recording and / or influencing a process variable with two communication interfaces, which does not have the disadvantages mentioned above and which is particularly easy to install and inexpensive.
Gelöst wird diese Aufgabe durch die im Anspruch 1 angegebenen Merkmale. Wesentliche Idee der Erfindung ist es, bei einem Feldgerät zwei Kommunikationsschnittstellen für zwei unterschiedliche Busse vorzusehen, wobei die Protokollumsetzung für Daten die zwischen den beiden Bussen übertragen werden sollen im Feldgerät selbst erfolgt. Dadurch ist eine zusätzliches Gateway nicht mehr notwendig.This object is achieved by the features specified in claim 1. The essential idea of the invention is to provide two communication interfaces for two different buses in a field device, the protocol conversion for data to be transmitted between the two buses taking place in the field device itself. An additional gateway is therefore no longer necessary.
Vorteilhafte Weiterentwicklung der Erfindung sind in den Unteransprüchen angegeben.Advantageous further developments of the invention are specified in the subclaims.
Nachfolgend ist die Erfindung anhand eines in der Zeichnung angegebenen Ausführungsbeispiels näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing. Show it:
Fig. 1 schematische Darstellung einer Automatisierungsanlage mit zwei Feldbussen, die über ein Gateway verbunden sind.Fig. 1 shows a schematic representation of an automation system with two field buses that are connected via a gateway.
Fig. 2 schematische Darstellung einer Automatisierungsanlage mit zwei Feldbussen ohne Gateway Verbindung.Fig. 2 shows a schematic representation of an automation system with two field buses without a gateway connection.
Fig. 3 schematische Darstellung eines Feldgerätes mit zwei Kommunikationsschnittstellen.Fig. 3 shows a schematic representation of a field device with two communication interfaces.
Fig. 1 zeigt in schematischer Darstellung eine herkömmliche Automatisierungsanlage bei der zwei Busse ein Feldbus FB1 und ein weiterer Datenbus FB2 über ein Gateway G miteinander verbunden sind. Der Feldbus FB1 ist mit drei Feldgeräten F1 , F2 und F3 verbunden. Die1 shows a schematic representation of a conventional automation system in which two buses, a field bus FB1 and a further data bus FB2 are connected to one another via a gateway G. The fieldbus FB1 is connected to three field devices F1, F2 and F3. The
Feldgeräte F bestehen im wesentlichen aus einem Transmitter T1 , T2, T3 und einem Sensorelement S1 , S2, S3. Beim Feldgerät F3 ist das Sensorelement S3 nicht direkt am Transmitter T3 angeordnet sondern am Ende einer längeren Verbindungsleitung L3.Field devices F essentially consist of a transmitter T1, T2, T3 and a sensor element S1, S2, S3. In the field device F3, the sensor element S3 is not arranged directly on the transmitter T3 but at the end of a longer connecting line L3.
Fig. 2 zeigt eine schematische Darstellung einer Automatisierungsanlage entsprechend Fig. 1 mit zwei Bussen FB1 und FB2 jedoch ohne separates Gateway. Das Feldgerät F1 ' ist mit dem Feldbus FB1 und dem Bus FB2 direkt verbunden.FIG. 2 shows a schematic representation of an automation system corresponding to FIG. 1 with two buses FB1 and FB2 but without a separate one Gateway. The field device F1 ' is directly connected to the fieldbus FB1 and the bus FB2.
Fig. 3 zeigt eine schematische Darstellung eines Feldgerätes hier F1 ' mit zwei Kommunikationsschnittstellen K1 und K2, die zum Anschluss an die jeweiligen Busse FB1 und FB2 dienen.Fig. 3 shows a schematic representation of a field device here F1 ' with two communication interfaces K1 and K2, which are used for connection to the respective buses FB1 and FB2.
Die beiden Kommunikationsschnittstellen K1 und K2 sind jeweils mit einem MikroController MC verbunden. Das Sensorelement S1 dient zur Erfassung einer Prozessvariablen (z. B. Druck, Temperatur, Füllstand oder Durchfluss). Es ist über einen A/D-Wandler A/D mit dem Mikrocontroller MC verbunden. Als Speicherelemente des Feldgeräts F1 ' sind ein Speicher S (Programmspeicher) und ein EEPROM für nicht flüchtige Daten (Parameter) vorgesehen, die ebenfalls mit dem Mikrocontroller MC verbunden sind. Zur Anzeige und Bedienung des Feldgerätes F1 ' dient ein Display D, das ebenfalls mit dem Mikrocontroller MC verbunden ist. Die Spannungsversorgung des Feldgerätes erfolgt über eine separate Stromversorgungseinheit SV, die entweder über einen Feldbus oder separat über einen Versorgungsanschluss gespeist wird.The two communication interfaces K1 and K2 are each connected to a microcontroller MC. The sensor element S1 is used to record a process variable (e.g. pressure, temperature, level or flow). It is connected to the microcontroller MC via an A / D converter A / D. A memory S (program memory) and an EEPROM for non-volatile data (parameters) are provided as memory elements of the field device F1 'and are likewise connected to the microcontroller MC. A display D, which is also connected to the microcontroller MC, serves to display and operate the field device F1 ' . The field device is supplied with voltage via a separate power supply unit SV, which is fed either via a fieldbus or separately via a supply connection.
Der Bus FB2 dient, wie in Fig. 2 dargestellt, zur Verbindung eines Feldgerätes (z. B. F1) mit einer speicherprogrammierbare Steuerung SPS. Als mögliche Kombination der beiden Busse FB1 und FB2 sind die folgenden bekannten Standards denkbar: FB1 : HART - FB2: Profibus DP, Profibus PA, Fieldbus Foundation H1 , Fieldbus Foundation HSE, Ethernet, TCP/IP, GSM, Bluetooth FB1 : Profibus PA- FB2: Profibus DP, Fieldbus Foundation H1 , Fieldbus Foundation HSE FB1 : Fieldbus Foundation H1 - FB2: Fieldbus Foundation HSE, Profibus DP Nachfolgend ist die Funktionsweise des erfindungsgemäßen Feldgerätes näher beschrieben. Das Feldgerät F1 ' kommuniziert in bekannter Weise mit der speicherprogrammierbaren Steuerung SPS über die Kommunikationsschnittstelle K2 und dem Feldbus FB2.As shown in FIG. 2, the bus FB2 is used to connect a field device (for example F1) to a programmable logic controller PLC. The following known standards are conceivable as a possible combination of the two buses FB1 and FB2: FB1: HART - FB2: Profibus DP, Profibus PA, Fieldbus Foundation H1, Fieldbus Foundation HSE, Ethernet, TCP / IP, GSM, Bluetooth FB1: Profibus PA- FB2: Profibus DP, Fieldbus Foundation H1, Fieldbus Foundation HSE FB1: Fieldbus Foundation H1 - FB2: Fieldbus Foundation HSE, Profibus DP The functioning of the field device according to the invention is described in more detail below. The field device F1 ' communicates in a known manner with the programmable logic controller PLC via the communication interface K2 and the fieldbus FB2.
Für die Datenkommunikation der speicherprogrammierbaren Steuerung SPS mit den Feldgeräten F2 bzw. F3 werden die entsprechenden Daten in dem jeweiligen Protokoll über den Bus FB1 an das Feldgerät F1 ' gesandt. Im Feldgerät F1 ' werden die Protokolle entsprechend umgesetzt und die Daten auf dem Bus FB1 zum jeweiligen Feldgerät F2 bzw. F3 übertragen. Die Datenkommunikation zwischen Feldgerät F2 bzw. F3 und der speicherprogrammierbaren Steuerung SPS erfolgt in umgekehrter Weise.For the data communication of the programmable logic controller PLC with the field devices F2 or F3, the corresponding data in the respective protocol is sent to the field device F1 ' via the bus FB1. The protocols are implemented accordingly in the field device F1 'and the data is transmitted on the bus FB1 to the respective field device F2 or F3. The data communication between field device F2 or F3 and the programmable logic controller PLC takes place in the opposite way.
Die wesentliche Idee der Erfindung besteht darin, dass die bei einer Verbindung von zwei Bussen notwendige Protokollumsetzung in einem Feldgerät erfolgt. The essential idea of the invention is that the protocol conversion necessary when two buses are connected takes place in a field device.

Claims

Patentansprüche claims
1. Feldgerät für die Prozessautomatisierung zum Erfassen und/oder Beeinflussen einer Prozessvariable mit zwei Kommunikationsschnittstellen K1 und K2, wobei die erste1. Field device for process automation for detecting and / or influencing a process variable with two communication interfaces K1 and K2, the first
Kommunikationsschnittstelle K1 zur Verbindung mit einem ersten Feldbus FB1 und die zweite Kommunikationsschnittstelle K2 zur Verbindung mit einem zweiten Datenbus FB2 dient und im Feldgerät eine Protokollumsetzung für Daten, die zwischen den beiden Bussen FB1 bzw. FB2 übertragen werden, erfolgt.Communication interface K1 for connection to a first field bus FB1 and the second communication interface K2 for connection to a second data bus FB2 is used and a protocol conversion for data that is transmitted between the two buses FB1 and FB2 takes place in the field device.
2. Feldgerät für die Prozessautomatisierung zum Erfassen und /oder Beeinflussen einer Prozessvariable mit zwei Kommunikationsschnittstellen nach Anspruch 1 , dadurch gekennzeichnet, dass der Feldbus FB1 dem HART® Standard und der Datenbus FB2 dem Profibus PA, Profibus DP, Foundation Fieldbus H1 oder Foundation Fieldbus HSE Standard entspricht.2. Field device for process automation for recording and / or influencing a process variable with two communication interfaces according to claim 1, characterized in that the fieldbus FB1 the HART® standard and the data bus FB2 the Profibus PA, Profibus DP, Foundation Fieldbus H1 or Foundation Fieldbus HSE Standard corresponds.
3. Feldgerät für die Prozessautomatisierung zum Erfassen und /oder Beeinflussen einer Prozessvariable mit zwei Kommunikationsschnittstellen nach Anspruch 1 , dadurch gekennzeichnet, dass der Feldbus FB1 dem Foundation Fieldbus H1 Standard und der Datenbus FB2 dem Foundation Fieldbus HSE oder dem Profibus DP Standard entspricht.3. Field device for process automation for detecting and / or influencing a process variable with two communication interfaces according to claim 1, characterized in that the fieldbus FB1 corresponds to the Foundation Fieldbus H1 standard and the data bus FB2 to the Foundation Fieldbus HSE or the Profibus DP standard.
4. Feldgerät für die Prozessautomatisierung zum Erfassen und /oder Beeinflussen einer Prozessvariable mit zwei Kommunikationsschnittstellen nach Anspruch 1 , dadurch gekennzeichnet, dass der Feldbus FB1 dem HART ® Standard und der Datenbus FB2 dem TCP/IP Standard entspricht.4. Field device for process automation for detecting and / or influencing a process variable with two communication interfaces according to claim 1, characterized in that the fieldbus FB1 corresponds to the HART ® standard and the data bus FB2 to the TCP / IP standard.
5. Feldgerät für die Prozessautomatisierung zum Erfassen und /oder Beeinflussen einer Prozessvariable mit zwei Kommunikationsschnittstellen nach Anspruch 1 , dadurch gekennzeichnet, dass der Feldbus FB1 dem Profibus PA Standard und der Datenbus FB2 dem Profibus DP, Foundation Fieldbus H1 oder Foundation Fieldbus HSE Standard entspricht.5. Field device for process automation for detecting and / or influencing a process variable with two communication interfaces according to claim 1, characterized in that the fieldbus FB1 the Profibus PA standard and the data bus FB2 corresponds to the Profibus DP, Foundation Fieldbus H1 or Foundation Fieldbus HSE standard.
6. Feldgerät für die Prozessautomatisierung zum Erfassen und /oder Beeinflussen einer Prozessvariable mit zwei Kommunikationsschnittstellen nach Anspruch 1, dadurch gekennzeichnet, dass der Feldbus FB1 dem Hart® Standard und der Datenbus FB2 dem GSM oder Bluetooth Standard entspricht. 6. Field device for process automation for detecting and / or influencing a process variable with two communication interfaces according to claim 1, characterized in that the field bus FB1 corresponds to the Hart® standard and the data bus FB2 to the GSM or Bluetooth standard.
PCT/EP2003/012114 2002-11-04 2003-10-31 Field device for process automation for recording and/or influencing a process variable, and comprising at least two communications interfaces WO2004042674A1 (en)

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