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WO2008037517A2 - Appareil de terrain et procédé pour sa mise en service et/ou son fonctionnement - Google Patents

Appareil de terrain et procédé pour sa mise en service et/ou son fonctionnement Download PDF

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Publication number
WO2008037517A2
WO2008037517A2 PCT/EP2007/057291 EP2007057291W WO2008037517A2 WO 2008037517 A2 WO2008037517 A2 WO 2008037517A2 EP 2007057291 W EP2007057291 W EP 2007057291W WO 2008037517 A2 WO2008037517 A2 WO 2008037517A2
Authority
WO
WIPO (PCT)
Prior art keywords
input circuit
data bus
field device
bus line
circuit
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/EP2007/057291
Other languages
German (de)
English (en)
Other versions
WO2008037517A3 (fr
Inventor
Manfred Hammer
Bernd Strütt
Ralf Armbruster
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.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and 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 and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of WO2008037517A2 publication Critical patent/WO2008037517A2/fr
Publication of WO2008037517A3 publication Critical patent/WO2008037517A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0426—Programming the control sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • 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

Definitions

  • the invention relates to a field device and method for its commissioning and its operation.
  • field devices are often used which measure process variables in the process sequence (sensors) or control variables (actuators).
  • sensors As an example of such sensors is the variety of different measuring devices commonly used in measurement and control technology, such as. Pressure, temperature, flow and / or level measuring devices to call.
  • Process variable corresponds.
  • This measurement signal is sent to a higher-level unit, e.g. a central control unit, such as e.g. a control room or a process control system, forwarded.
  • a higher-level unit e.g. a central control unit, such as e.g. a control room or a process control system.
  • the entire process control is performed by the higher-level unit, where the measurement signals of various field devices are evaluated and generated due to the evaluation control signals for actuators that control the process flow.
  • An example of an actuator is a controllable valve that regulates the flow of a liquid or gas through a pipe section.
  • the signal transmission between field device and higher-level unit is usually in digital form via a data bus.
  • Known international standards for this signal transmission are PROHBUS, FOUNDATION HELDBUS or CAN bus.
  • the control of the bus connection takes place in newer field devices, for example by microprocessors, ASICs (application-specific intergrated circuits) or by freely programmable logic circuits, such as. FRJA's (field programmable gate arrays).
  • the corresponding control program is stored in a non-volatile memory in the field device and is executed in a microprocessor. Among other things, it controls the operating, measuring and control functions of the field device.
  • field devices are supplied with power via the data bus line.
  • the power consumption of the individual connected field devices is determined, and determines the power utilization of the data bus.
  • control signals are sent via the data bus, which regulate the current consumption of the respective field devices as a function of the current load of the data bus.
  • the data bus line supplies the power supply in each case for the entire field device, and the current consumption is recorded in the field device, e.g. controlled by adjustable resistors, field effect transistors or controllable current and voltage sources to the current consumption value.
  • a minimum requirement that is sufficient for the basic supply of the entire field device must be made available via the data bus.
  • the invention consists in a field device
  • [0022] comprising a bus terminal to be connected to the data bus, and [0022] - having a processor-controlled current control, and [0023] - having a residual circuit,
  • the invention consists in a method for starting up a field device according to the invention, in which
  • the input circuit is connected to the data bus line, [0028] the input circuit goes into operation directly through the connection to the data bus line [0029],
  • the input circuit determines a short random delay time, and [0031] the input circuit activates the residual circuit after this delay time has elapsed. Furthermore, the invention comprises a method for starting up a field device according to the invention, in which
  • the input circuit is connected to the data bus line, [0035] the input circuit goes into operation directly through the connection to the data bus line [0036], and
  • the invention comprises a method for starting up a field device according to the invention, in which
  • the input circuit is connected to the data bus line
  • the input circuit puts the residual circuit into operation, wherein
  • the invention relates to a method for starting up and / or operating a field device according to the invention, in which the processor-controlled current control limits the current consumption of the field device via the data bus to a predetermined upper limit.
  • the invention comprises a method for operating a field device according to the invention, in which the field device is put into a sleep mode at predetermined times, in which only the input circuit is in operation.
  • the input circuit terminates the sleep mode after a predetermined time in which it restarts the residual circuit.
  • the input circuit comprises a communication unit over which it
  • the higher-level unit specifies times over the data bus line, to which
  • the field device is to be put into sleep mode and times, too
  • the input circuit listens to these times and the field device to these
  • the field device at the times, to which only the input circuit in operation, is a very low power consumption, which is well below the minimum power requirements of conventional field devices, in which all times a minimum power requirement for the supply of the entire field device must be provided via the data bus.
  • FIG. 1 shows a data bus system with several field devices
  • FIG. 2 shows a block diagram of a field device according to the invention
  • Fig. 1 shows a schematic representation of a data bus system. It comprises a higher-level unit 1, to which several field devices 3 are connected via a data bus line 5.
  • the superordinated unit 1 is, for example, a central control unit, such as e.g. a control room or a process control system. It is usually arranged in a control room, from which the entire process control takes place centrally.
  • the field devices 3 are usually mounted decentralized to their tasks corresponding locations.
  • the field devices 3 are sensors and actuators. To the
  • Sensors include, in particular, measuring instruments, such as Pressure, temperature, flow and / or level measuring instruments that deliver a measuring signal that corresponds to the measured value of a detected process variable. This measurement signal is transmitted via the data bus to the higher-level unit 1.
  • the actuators are those field devices that control a controlled variable, e.g. Valves.
  • the communication between the higher-level unit 1 and the field devices 3 takes place via the data bus 5 via internationally standardized transmission interfaces by means of special protocols, such as e.g. PROF1BUS, FOUNDATION HELDBUS or CAN bus.
  • special protocols such as e.g. PROF1BUS, FOUNDATION HELDBUS or CAN bus.
  • FIG. 2 shows a block diagram of a field device 1 according to the invention, which can be connected via the data bus 5 to the higher-level unit 1, and is supplied with power via the data bus line 5.
  • the illustrated field device 3 is a sensor.
  • the field device 3 consists of an input circuit 7 and a residual circuit 9 connected thereto.
  • the input circuit 7 forms the connection of the field device 3 to the data bus.
  • the residual circuit 9, which is separate from the input circuit 7, forms the functional unit of the field device 1, which, depending on the field device type, serves, for example, to carry out the measurement or control tasks of the field device 3.
  • a sensor it comprises, for example, a sensor element for detecting a physical measured variable and associated measuring electronics, which picks up, processes and / or evaluates the measured variables detected by the sensor element and converts them into a corresponding measuring signal, which is then available to the residual circuit 9 via a corresponding interface 10.
  • the field device 3 is connected via the input circuit 7 to the data bus 5 and supplied with energy.
  • the input circuit 7 has a bus terminal 11, to which the data bus 5 is to be connected.
  • the input circuit 7 has a processor-controlled current control, which serves to control the current consumption of the field device 3.
  • This comprises an intelligent unit 13, for example a microprocessor, an ASIC (application-specific intergrated circuits) or a freely programmable logic circuit, such as e.g. a FIGA (field programmable gate array).
  • the corresponding control program is stored in non-volatile memory in the field device 3 and is executed by the intelligent unit 13.
  • the intelligent unit 13 controls the power consumption via a current control, which in the illustrated embodiment comprises a control unit 15 and a controllable current source 17 connected thereto.
  • the intelligent unit 13 is connected via a control line 18 to the control unit 15.
  • the controllable current source 17 is fed via the bus terminal 11 from the data bus 5.
  • connection lines 19a, 19b connecting the bus terminal 11 to the power source 17.
  • One of the connection lines 19a is connected to the intelligent unit 13 via a connection 21 and corresponding input filters 23.
  • the input circuit 7 goes directly through the connection to the data bus 5 in operation.
  • a concern of the bus voltage is detected at the connection lines 19a, 19b via the connection 21 and the intelligent unit 13 executes a start program, through which only the input circuit 7 goes into operation.
  • the energy to be provided for this via the bus is very small in comparison with the energy requirement of the entire field device 3, since hereby only the input circuit 7 has to be supplied. Accordingly, the current consumption can be controlled by the processor-controlled current control to a very low starting value.
  • the residual circuit 9 is supplied by the input circuit 7 with energy.
  • the intelligent unit 13 of the input circuit 7 and the residual circuit 9 communicates a communication connection via which the input circuit 7 to the residual circuit 9. In the illustrated embodiment, this communication takes place via the interface 10.
  • the start-up of the residual circuit 9 is carried out by the power supply of the residual circuit 9 is provided by the input circuit 7 ready. This is done in the illustrated embodiment via a corresponding control of the switch 27, through which the previously opened switch 27 is closed.
  • corresponding control signals can be transmitted to the residual circuit 9 via the interface 10, which, for example, set in motion a sequence control contained in the residual circuit 9.
  • the operating modes include, for example, a sleep mode in which the residual circuit 9 is inactive, a normal mode in which the residual circuit 9, for example, carries out periodic measurements and has an average energy demand, or a peak operation, carried out in the example, measurements with a very high measurement rate and the residual circuit 9 has a very high energy requirement.
  • the input circuit 7 has a communication unit 29 connected to the intelligent unit 13, e.g. a modem, via which the communication of the input circuit 7 with the superordinated unit 1 takes place.
  • the communication unit 29 is connected in the embodiment shown in FIG. 2 via a transmission controller 31 to the control unit 15 of the current control and connected via the connection 21 and the input filter 23 to the connection line 19 a.
  • the input circuit 7 is thus able to listen to the bus and to send information via the bus.
  • the entire communication of the field device 3 with the higher-level unit 1 via this one communication unit 29.
  • the transferring information includes both the information concerning the input circuit, as well as the entire communication of the residual circuit 9 with the parent unit 1.
  • the latter takes place via the communication unit 29 and the interface 10.
  • the information to be sent then in particular includes the measurement results of the rest of the circuit 9, which are transmitted in the measurement mode via the interface 10 to the input circuit 7.
  • Residual circuit 9 is given a high degree of flexibility with regard to the energy requirement of the field device 1, the advantages of which are based on the methods described below for commissioning and operation of the field device according to the invention will be explained in more detail.
  • a major advantage of the field device 3 according to the invention is that by connecting the field device 3 to the data bus line 5, initially only the input circuit 7 goes into operation.
  • the energy requirement of the input circuit 7 is very low compared to the energy requirement of the entire field device 1. Accordingly, the power source from which the data bus 5 is fed is not overloaded even when a large number of field devices 1 are connected to the data bus 5 at the same time. A response of corresponding fuses in the segment couplers or power supply devices described above is thereby avoided.
  • a further advantage is that the times at which the associated residual circuits 9 of the connected field devices 3 are switched on via the corresponding input circuits 7 are very freely and flexibly selectable. Thus, both automated methods for commissioning and via the higher-level unit 1 or the input circuits 7 controlled method for commissioning can be realized.
  • An example of an automated method for commissioning is that the respective input circuit 7 is connected to the data bus 5, and the respective input circuits 7 automatically start their operation by the operating voltage applied thereto. Subsequently, each connected to the data bus 5 input circuit 7 determines a short random delay time and takes the associated residual circuit 9 after this delay time in operation. This ensures that the individual residual circuits 9 automatically, ie without a corresponding communication via the bus is required, and at different times in operation. As a result, the power supply for the data bus 5 is relieved during commissioning. In addition, it is ensured that no overload occurs even if the individual residual circuits 9 have an excessive power consumption during the switch-on, since these increased consumption values burden the power supply at different times.
  • the input circuit 7 has a processor-controlled current control.
  • the respective input circuits 7 are connected to the data bus line 5, and initially the input circuits 7 go into operation via the operating voltage supplied via the data bus line 5. Subsequently, the respective residual circuits 9 are taken in operation by the associated input circuits 7 wherein the processor-controlled current controls of the individual input circuits 7 limit this a start over the data bus 5 to the respective field device 3 start-up ström to a predetermined upper limit.
  • the power consumption of the respective field device 3 is preferably limited by the processor-controlled current consumption to a predetermined upper limit.
  • Input circuit 7 is connected to the data bus at startup of the field device 3 and put into operation by applying the operating voltage, and then take the residual circuit 9 in operation, the processor-controlled current control for this purpose via the data bus 5 supplied starting current slowly from zero to a predetermined setpoint boots up.
  • Residual circuit 9 the power requirements of each connected to the data bus 5 field devices 3 can make very flexible and energy-saving even after startup. In particular, it is possible to reduce the energy consumption of each field device 3 at given times or, if necessary, to the very low energy requirement of the respective input circuit 7.
  • Field device 3 is temporarily put into a sleep mode in which only the input circuit 7 is in operation.
  • corresponding time window are defined, which are stored in the context of commissioning in corresponding memories in the respective field devices 3.
  • the start times at which the respective field devices 3 are put into sleep mode by the input circuit 7 are predetermined within the framework of the commissioning by the superordinate unit 1, and the respective input circuits 7 each time the sleep modes terminate fixed time implemented in the device in which they take the associated residual circuit 9 back into operation. This makes it possible to reduce the power requirement of the field devices 3, which corresponds to the sum of the power consumptions of the individual connected field devices 3.
  • more field devices 3 can be connected to a single data bus 5, as is the case with conventional field devices.
  • conventional field devices a minimum power requirement of each individual field device must be covered at all times, which must be sufficient for the energy supply of the entire field device.
  • the energy savings achieved by the targeted displacement of individual field devices in the sleep mode can also be used to cover the peak demand of another field device 3 connected to the same data bus line 5.
  • the input circuit 7 of the field device 3 has the above-described communication unit 29, via which the input circuit 7 listens to the data bus line 5.
  • the procedure is such that the higher-level unit 1 predetermines times via the data bus line 5 at which the field device 3 is to be put into sleep mode and specifies times at which the sleep mode is to be ended.
  • the input circuit 7 listens to these times via the data bus 5 and puts the field device into sleep mode at these times or terminates the sleep mode accordingly.
  • the provision of the communication unit 29 means in comparison to conventional field devices no additional overhead, since even in conventional field devices communication between field device and higher-level unit is provided to transmit, for example, recorded by the field device measurement results from the parent unit or control signals to receive over the data bus.
  • the special feature of the field device according to the invention is to arrange the communication unit 29 in the input circuit 7. As a result, the input circuit 7 can communicate with the higher-order unit 1 even when the residual circuit 9 is not in operation.
  • the residual circuit 9 is preferably placed in the illustrated embodiment by the opening of the switch 27 in the sleep mode.
  • This sleep mode corresponds to a shutdown of the residual circuit 9. This ensures that the residual circuit 9 consumes no energy in sleep mode.
  • the residual circuit 9 could be put into a sleep mode by appropriate hardware and software, which corresponds to a classic stand-by mode. In that case, the residual circuit 9 needs a power supply, albeit very small, during the stand-by mode, and methods must be implemented in the input circuit 7 by which the residual circuit 9 is put into this state or by which this state is terminated becomes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Programmable Controllers (AREA)
  • Small-Scale Networks (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

L'invention concerne un appareil de terrain et un procédé pour sa mise en service et son fonctionnement, permettant une optimisation de la consommation de courant. A cet effet, l'invention est caractérisée en ce que l'appareil de terrain (3) peut être connecté, via une ligne de bus de données (5), à une unité supérieure (1), et être alimenté en courant via la ligne de bus de données, et en ce qu'il présente un circuit d'entrée (7) et un circuit restant séparé (9), en ce que le circuit d'entrée (7) fonctionnant directement via la connexion avec la ligne de bus de données (5), présente un terminal bus (11) pour la connexion avec la ligne de bus de données (5) et une source de courant commandée par un processeur, et en ce que le circuit restant (9) est alimenté en énergie via le circuit d'entrée (7) et est mis en service par ledit circuit d'entrée (7).
PCT/EP2007/057291 2006-09-28 2007-07-16 Appareil de terrain et procédé pour sa mise en service et/ou son fonctionnement Ceased WO2008037517A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006046243.2 2006-09-28
DE200610046243 DE102006046243A1 (de) 2006-09-28 2006-09-28 Feldgerät und Verfahren zu dessen Inbetriebnahme und/oder Betrieb

Publications (2)

Publication Number Publication Date
WO2008037517A2 true WO2008037517A2 (fr) 2008-04-03
WO2008037517A3 WO2008037517A3 (fr) 2008-05-29

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PCT/EP2007/057291 Ceased WO2008037517A2 (fr) 2006-09-28 2007-07-16 Appareil de terrain et procédé pour sa mise en service et/ou son fonctionnement

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DE (1) DE102006046243A1 (fr)
WO (1) WO2008037517A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9134151B2 (en) 2009-09-16 2015-09-15 Endress + Hauser Conducta Gesellschaft für Mess-und Regeltechnik mbH + Co. KG Method for operating a sensor in a multisensor system, especially in a field device in the form of a measuring device for process automation technology, and sensor for performing the method

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008054914A1 (de) * 2008-12-18 2010-06-24 Endress + Hauser Flowtec Ag Messeinrichtung und Verfahren zum Betreiben einer Messeinrichtung
DE102009047805A1 (de) * 2009-09-30 2011-03-31 Siemens Aktiengesellschaft Hauptprozessoreinheit für ein speicherprogrammierbares Steuerungssystem
DE102009047803A1 (de) * 2009-09-30 2011-03-31 Siemens Aktiengesellschaft Peripherieeinheit für ein speicherprogrammierbares Steuerungssystem
DE102009047804A1 (de) * 2009-09-30 2011-03-31 Siemens Aktiengesellschaft Speicherprogrammierbares Steuerungssystem
DE102010063227A1 (de) 2010-12-16 2012-06-21 Endress + Hauser Gmbh + Co. Kg Messgerät und Verfahren zu dessen Betrieb
DE102010063949A1 (de) 2010-12-22 2012-06-28 Endress + Hauser Gmbh + Co. Kg Messgerät
DE102011080955A1 (de) * 2011-08-15 2013-02-21 Endress + Hauser Process Solutions Ag Verfahren zur Inbetriebnahme wenigstens eines Feldgerätes, sowie Anordnung umfassend ein Feldgerät und eine übergeordnete Einheit zur Durchführung des Verfahrens
DE102019118839A1 (de) * 2019-07-11 2021-01-14 Endress+Hauser SE+Co. KG Verfahren zum Betreiben eines Feldgerätes der Automatisierungstechnik

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DE19626502A1 (de) * 1996-07-02 1998-01-15 Leuze Electronic Gmbh & Co Sensor-Aktor-Bussystem
DE19904878A1 (de) * 1999-02-06 2000-08-10 Merten Gmbh & Co Kg Geb Einrichtung für einen Datenbus
US6686831B2 (en) * 2001-01-23 2004-02-03 Invensys Systems, Inc. Variable power control for process control instruments
JP4392740B2 (ja) * 2001-08-30 2010-01-06 株式会社ルネサステクノロジ 半導体記憶回路
DE10155189A1 (de) * 2001-11-12 2003-07-03 Endress & Hauser Gmbh & Co Kg Verfahren zur Regelung der Stromversorgung mehrerer Feldgeräte
DE10254054A1 (de) * 2002-11-19 2004-06-03 Endress + Hauser Flowtec Ag, Reinach Vorrichtung zur Bestimmung und/oder Überwachung des Volumen- und/oder des Massendurchflusses eines Mediums

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9134151B2 (en) 2009-09-16 2015-09-15 Endress + Hauser Conducta Gesellschaft für Mess-und Regeltechnik mbH + Co. KG Method for operating a sensor in a multisensor system, especially in a field device in the form of a measuring device for process automation technology, and sensor for performing the method

Also Published As

Publication number Publication date
WO2008037517A3 (fr) 2008-05-29
DE102006046243A1 (de) 2008-04-03

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