WO2016026620A1 - Procédé de test d'un appareil de terrain - Google Patents

Procédé de test d'un appareil de terrain Download PDF

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Publication number
WO2016026620A1
WO2016026620A1 PCT/EP2015/066266 EP2015066266W WO2016026620A1 WO 2016026620 A1 WO2016026620 A1 WO 2016026620A1 EP 2015066266 W EP2015066266 W EP 2015066266W WO 2016026620 A1 WO2016026620 A1 WO 2016026620A1
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WO
WIPO (PCT)
Prior art keywords
field device
test
signal
electronic unit
test parameter
Prior art date
Application number
PCT/EP2015/066266
Other languages
German (de)
English (en)
Inventor
Alexey Malinovskiy
Ghislain Daufeld
Harald Faber
Klaus Pankratz
Original Assignee
Endress+Hauser 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 Gmbh+Co. Kg filed Critical Endress+Hauser Gmbh+Co. Kg
Publication of WO2016026620A1 publication Critical patent/WO2016026620A1/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
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • G05B19/0425—Safety, monitoring
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2829—Testing of circuits in sensor or actuator 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
    • G05B2219/10—Plc systems
    • G05B2219/14—Plc safety
    • G05B2219/14064—Portable diagnostic unit, offline
    • 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
    • G05B2219/33—Director till display
    • G05B2219/33331—Test, diagnostic of field device for correct device, correct parameters

Definitions

  • the field device is an electronic unit for
  • the electronic unit comprises at least one hardware module and a software program.
  • Measuring devices In process as well as in automation technology, field devices are often used, which serve to detect and / or influence process variables. Measuring devices, such as
  • Level gauges, flowmeters, pressure and temperature measuring instruments, pH meters, conductivity meters, etc. which record the respective process variables level, flow, pressure, temperature, pH or conductivity.
  • actuators such as valves or pumps, via the z.
  • Field devices are in principle all devices that are used close to the process and the process-relevant
  • field device Provides or process information.
  • a large number of such field devices are offered and distributed by the Endress + Hauser Group.
  • all types of measuring devices and actuators are thus to be subsumed.
  • field device but also includes z.
  • a wireless adapter or other integrated into a bus system / integrable bus participants When detecting and / or influencing process variables, a field device performs certain hardware and software-related processes. This error can occur. This can possibly lead to considerable damage. Therefore, it is advantageous if these processes of a field device can be checked. In particular, it is advantageous to check these processes under measuring operating conditions, because some errors only become apparent under measuring operating conditions. For example. should the
  • Measurement signal processing of a measuring device while the meter performs predetermined operations in measuring operation, are checked. For example, in the case that a field device is a measuring device, it may happen that the meter via a
  • a simple first way to check is to generate an analog test signal with an external test device, and to enter this analog test signal via an electrical interface in the field device.
  • the term test signal is to be understood as a signal which is not derived from a process variable but is generated, and which has the same properties as a measurement signal.
  • a measurement signal is a signal that is derived from a sensor element of a field device when a process variable is detected.
  • the development of a system for generating test signals can be associated with great expense.
  • the development effort for such a test system would be comparable to the cost of developing the electronics unit of the radar itself.
  • the electronics unit must be changed by the coupling so that a path for feeding the analog signal can be made. This may possibly lead to the electronics unit having a mode of operation during the testing which deviates from the mode of operation which the electronic unit has in the absence of a coupled test system.
  • the test can not ensure that the electronic unit during measurement signal processing a measured value corresponding to the process variable, esp.
  • German Patent Application DE 102012002013 A1 discloses a test system for a measuring device, wherein a test device acts on the measuring device in such a manner during the test via a control input that a test signal is present as an output signal at the signal output of the measuring device.
  • the test signal may be predetermined by the tester or it may be the signal resulting from the respective actions of the tester on different components or functional blocks of the meter.
  • the tester simulates a predeterminable value of the measured variable
  • the test signal is the associated signal that results from the processing of the value of the measured variable in the measuring instrument.
  • Test signal is additively connectable to the sensor signal.
  • the transmitter further has a computing device which checks the functionality of the transmitter based on the components of the test signal contained in the measurement signal and separates the measurement signal from the components of the test signal by calculation.
  • a method for testing a sensor by selectively disturbing the detection of the quantity to be measured and evaluating the resulting output signal of the sensor is known.
  • a second possibility for checking the measurement signal processing of a field device is to transmit a pre-digitized test signal to the field device via a communication interface. In many field devices, an analog measurement signal derived from the process is sampled with an A / D converter in the field device. This sampled measurement signal is forwarded to a signal processor in the field device. In the second possibility for checking the measurement signal processing, the pre-digitized
  • Test signal are transmitted directly to the signal processor via the communication unit.
  • this solution has the disadvantage that the duration of a digital transmission of a test signal can influence the measuring operation behavior of the signal processor. For example, it may take so long for a realistic review of the
  • Measurement signal processing of the electronics unit of the field device is no longer possible. This also results in a significantly extended measuring cycle of the field device and the distribution of the energy available to the field device can be changed or the so-called energy balance of the field device can be impaired.
  • a measurement cycle is understood to be the duration of the acquisition of a process variable or the processing of a measured value.
  • the energy balance of the field device corresponds to the distribution of energy supplied to the field device to various components and / or for certain hardware and / or software-related processes of the field device
  • the invention is therefore based on the object, the measurement signal processing and / or related to the measurement signal processing hardware and / or software-related flow of the electronic unit of a field device under
  • the object is achieved by a method according to claim 1, as well as a device according to claim 12.
  • test signal in particular instead of a measurement signal, is processed by the at least one hardware module and / or the software program, and
  • the field device can thus be subjected to a check without exerting any influence on the runtime behavior or the energy balance of the field device.
  • Field devices in particular field devices of process automation, often have an electronics unit which is suitable for converting electrical measurement signals into a digital measurement signal and also for processing this digital measurement signal such that the field device can deliver a measured value.
  • a major advantage of the invention results from the fact that no additional electronic means are needed to generate a test signal because the functions needed to generate a test signal are already contained in an electronics unit.
  • the output signal of the field device corresponds to the behavior of the field device, in particular of the electronic unit, when the field device is supplied with the test signal.
  • the test signal is generated, it is provided in the at least one hardware module or the software program for further processing.
  • This results in a measurement signal processing phase in which the distribution of the energy available to the field device is influenced.
  • This is the available energy for one or more different functional blocks of a field device.
  • the hardware and / or software operations are not coordinated, errors may occur.
  • the energy consumption of several functional blocks within a period of time can reach a high level, so that there is not enough energy available for the processes. Not all processes can be adequately supplied, and thereby one or more processes are expediently terminated.
  • it may happen that a computing resource such as a microprocessor of the field device is overloaded by the simultaneous execution of multiple processes. Thus, it may happen that specific, esp. Software-related, processes are interrupted.
  • Radar level gauge in which the measurement signal at different levels corresponding to different echo signals or in the evaluation of a means of the electronic unit generated test signal corresponding to a measurement signal of this kind, it may happen that a large energy requirement for the computational effort of
  • Measurement signal processing arises. This is an energy requirement that is higher than the energy required for processing a measurement signal, which, for example, only one Echo signal contains. This change in the energy requirement of the at least one hardware module can given if cause errors in other functions of the field device, such as. Communications operations, error messages, timing of the runtime behavior of the field device, etc. occur.
  • test signal in particular in place of a measuring signal
  • a switch for example, by using a switch.
  • This may be a switch implemented in software, which is connected downstream of an A / D converter element, the A / D converter element serving to scan an analog measurement signal. If a switch is so used, can easily
  • Measuring signal to be replaced by a test signal may be, for example, a
  • the test signal processed and output by the electronic unit is examined whether the test signal processed and output by the electronic unit is within a predetermined tolerance range, the tolerance range being determined as a function of the test parameter.
  • the tolerance range being determined as a function of the test parameter.
  • the test signal processed and output by the electronic unit can be output in the form of a measured value. It is examined whether this measured value falls within a tolerance range of measured values, whereby this tolerance range covers the measured values, which are to be expected on the basis of the specified test parameters.
  • the output signal can also be an error message that can be expected based on a predetermined test parameter or a test signal generated therefrom.
  • the output signal may be an input and / or
  • Output current behavior of the field device act.
  • the evaluation can be carried out, for example, by monitoring the input and / or output current behavior in order to determine a crossing of the input and / or output current value from predetermined input and / or output current limit values.
  • the field device has a
  • Communication unit for data transmission to and / or from the field device, in particular to or from the electronics unit of the field device,
  • test parameter is transmitted to the field device, in particular the electronics unit of the field device, via the communication unit.
  • the number of can be extended to generate test signals of the field device by new test parameters or new combinations of test parameters of the electronic unit are added.
  • Data corresponding to the processed test signal is transmitted to the HMI device via the communication unit.
  • the field device can do more than one
  • Field device processes the measurement signal from the electronics unit of the field device for processing a measured value, and in a second operating mode of the field device, the test signal is processed by the electronic unit of the field device for self-diagnosis.
  • the field device can be switched from the first operating mode to the second operating mode by means of the switch.
  • Operation mode at predetermined times to check the field device regularly, and / or the switching of the field device in the second operating mode can be triggered at predetermined events. For example. If the field device provides an implausible measured value that can not correspond to an actual measured value, the field device is switched to the second operating mode.
  • a measured value that can not correspond to an actual measured value would be, for example, a fill level measurement value that corresponds to a negative fill level or a fill level that is greater than the container in which the fill level is determined.
  • the test signal is processed by the electronics unit.
  • the electronics unit of the field device has a microprocessor, wherein the microprocessor is part of the hardware module and is used to execute at least part of the software program in the microprocessor, the test parameter being made available to the microprocessor , and
  • test signal is generated by the microprocessor as a function of the test parameter.
  • Test parameter values or test parameter values are made available to the field device, esp.
  • the electronics unit of the field device in the course of a test program, which is preferably stored in the field device and / or in the operating device, and / or after specification of an operator of the operating device.
  • the field device is a
  • the radar measuring device is able to be represented as a frequency spectrum, and the test signal is generated as a function of at least one of the test parameters corresponding to a frequency, a measurement signal intensity, and / or a noise level.
  • the test signal is generated as a function of at least one of the test parameters corresponding to a frequency, a measurement signal intensity, and / or a noise level.
  • a measurement situation can, for example, by a
  • the term measurement situation can also be understood as an error state of a field device in which reliable detection of a process variable is not possible.
  • Radar level gauge for example, in a measurement situation in which no fill level corresponding echo signal is detected, to be checked. Furthermore, test signals can be generated which simulate the filling and emptying processes of a medium in a container.
  • the generation of the test signal is impaired, in that the scattering factor distributes the test parameter values, on the basis of which the test signal is generated, within a predetermined spread, in particular randomly.
  • a frequency value and / or a measurement signal intensity value is selected by means of the operating device and as
  • Test parameter value provided to the field device in particular the electronic unit of the field device.
  • the object is achieved with respect to the device by a device comprising an operating device and a field device, wherein the field device has an electronic unit for measuring signal processing, wherein the electronic unit comprises at least one hardware module and a software program,
  • the electronic unit serves to generate a test signal as a function of at least one test parameter
  • the hardware module and / or the software program processes the test signal, in particular instead of a measuring signal
  • the field device evaluates an output signal of the electronic unit and / or transmits it to the operating device for evaluation in order to determine the measurement signal processing itself and / or a hardware-related and / or hardware-related measurement signal processing
  • Communication interface of the operating device serves to at least one
  • a preferred embodiment of the field device is a radar level gauge, wherein the radar level gauge has an electronic unit for processing a measuring signal which can be represented, in particular, as a frequency spectrum, and in that the electronic unit has a microprocessor,
  • the microprocessor generates a test signal as a function of predetermined frequency values and / or predetermined measurement signal intensity values, in particular associated with the frequency values.
  • the microprocessor is used to generate a test signal in which the microprocessor performs an inverse Fourier transformation of a frequency spectrum determined by the given test parameter, and / or by the microprocessor adapting sinusoidal curves to the predetermined test parameters and forming a sum of these curves.
  • the operating device of the device is used so that the
  • HMI device has a graphical interface that is used to select a frequency value and a measurement signal intensity value by an operator of the HMI device a location on a displayed on the graphical interface
  • Measurement signal intensity value as test parameter value to the field device in particular the
  • Electronic unit of the field device transmits.
  • the device is used for the purpose of training by a field device operator.
  • a training device such as a container or a pipe.
  • process variables would be detected in the training device and corresponding operations to be performed by the field device operator due to an output signal of the field device would be practiced by the field device operator as part of a training.
  • the device according to the invention it is possible to simulate all measurement situations without having to use a training device.
  • FIG. 1 shows a first block diagram of a first example according to the invention
  • FIG. 2 shows a second block diagram of a second example according to the invention of the electronics unit of the field device and of the operating device in a test device; 3 shows an exemplary possibility for selecting test parameters or
  • FIG. 4 shows an exemplary test signal that has been generated as a function of test parameters, in particular in the manner shown in FIG. 3.
  • FIG. 1 shows a first block diagram of an example according to the invention
  • the electronics unit 2 may have different
  • Measurement signal sampling, measurement signal processing and communication are used.
  • test parameters are stored in a memory unit 3.
  • different test parameter values are stored for each test parameter type, whereby different test parameter types can also be used.
  • the hardware module 4 is provided for the measurement signal processing. For example. become
  • Test parameter values which correspond to one or more frequencies, for example between 5 GHz and 10 GHz, measurement signal intensities and / or a noise level.
  • the test signal is generated by means of the hardware module 4 as a function of the test parameters.
  • a test program 5 can retrieve a specific series of test parameter values from the memory unit 3 and make them available to the hardware module 4.
  • the hardware module 4, in particular the test program 5 of the hardware module 4, then carries out certain mathematical algorithms in order to generate a realistic measurement signal-corresponding test signal 6.
  • the test signal 6 is supplied via a switch 7 realized in the software to a measurement signal processing function block 8 contained in the hardware module 4, which executes a measurement signal processing program 8. In a first operating mode, the switch 7 is in a first switching position in which no test signal 6 for
  • Messsignal kausprogramm 8 can get.
  • a measurement signal sampled by a measurement signal sampling component 10 is supplied via the switch 7 to the hardware module 4.
  • this switch 7 is switched so that the test signal 6 instead of a measuring signal 9 to the measuring signal processing function block 8, the one
  • test signal 6 is then processed instead of the measuring signal 9.
  • the current level of the current entering in the hardware module 4 changes. Due to the fact that the computational effort to process a given test signal 6 or measurement signal 9 depends on the characteristics of the signal, completely different energy requirement quantities for different signals can arise. Furthermore, the time required to process a test signal 6 or measurement signal 9,
  • Measurement signal processing by different measurement signals 9 is therefore necessary.
  • the measurement signal processing and / or hardware-related and / or software-related sequences of the field device 1 are checked by an output signal of the field device 1 is evaluated.
  • the output signal is considered a signal coming from a
  • Communication unit 12 is output, and / or as current behavior of
  • an evaluation module 1 1 is shown.
  • the evaluation module 1 1 can be used to evaluate the processed test signal 6. Because the test signal 6 would be generated on the basis of the predetermined test parameters, it is to be expected that the measurement signal processing will deliver a predetermined result.
  • a tolerance range can be determined based on the predetermined test parameters. If the data output by the measurement signal processing, which correspond to the processed test signal, fall within this tolerance range, it is ensured that at least the measurement signal processing could be carried out without error.
  • FIG. 2 shows a second block diagram of an example of the electronic unit 2 of the field device 1.
  • Fig. 2 shows a block diagram of a
  • Radar level transmitter Furthermore, an operating device 13 is shown, which communicates via the communication unit 12 with the field device 1, in particular with the hardware module 4.
  • the hardware module 4 In the hardware module 4 is this one
  • Microprocessor or signal processor with a switch 7 and function blocks for test signal generation 5 and measurement signal processing 8.
  • a power supply unit 14 is shown, which serves to distribute energy to the various components 4, 12 shown of the electronic unit 2.
  • a communication unit 12 serves
  • the communication unit 12 further outputs data corresponding to the processed test signal 6 from the
  • Measurement signal processing function block 8 off.
  • This data can be called an output signal.
  • the term output signal further includes error messages that are triggered due to the test signal 6 and / or the changes of the Mostsslust. Output current behavior of the field device, resulting from the test signal 6.
  • Fig. 2 is further an A / D converter element, as
  • Measurement signal sampling component 10 is shown.
  • the radar level gauge has a transmitting unit 15, a receiving unit 16 and a mixer assembly 17. These components are used according to the above-described first mode of operation to prepare the measuring signal 9.
  • FIG. 3 shows an exemplary option for selecting test parameters or values for a radar level gauge.
  • FIG. 3 shows a graphical interface 18 of an operating device 13. An operating device operator can here frequencies or positions of echo signals and the amplitudes in these
  • Echo signals detected by a radar level gauge can be specified.
  • the standard deviation and / or peak width 23 of an echo signal can be specified.
  • FIG. 4 shows an example test signal 6 which is generated in response to test parameters selected in the manner shown in FIG. 3.
  • test signal 6 can be calculated as a sum of several sinusoidal curves. Each of these curves is mathematically calculated so that the frequency and the amplitude of the curve correspond to the respective selected frequency and signal intensity of the frequency spectrum.
  • test signal 6 can be calculated by means of an inverse Fourier transformation. From the test parameters is first a desired
  • a microprocessor 4 which is used for measurement signal processing, is designed to perform such a calculation within milliseconds, so that this process a represents negligible overhead, which would only result in a brief interruption of the data acquisition.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

L'invention concerne un procédé de test d'un appareil de terrain (1) équipé d'un dispositif de traitement de signal de mesure ; l'appareil de terrain (1) comprend une unité électronique (2) de traitement du signal de mesure ; l'unité électronique (2) comprend au moins un module matériel (4) et un logiciel (8). L'invention est caractérisée par les étapes dans lesquelles : un signal de test (6) est généré par l'unité électronique (2) en fonction d'au moins un paramètre de test, le signal de test (6) est traité, en particulier à la place d'un signal de mesure (9), par l'au moins un module matériel (4) et/ou le logiciel (8), et un signal de sortie de l'unité électronique (2) est évalué afin de vérifier le traitement de signal de mesure lui-même et/ou une opération matérielle et/ou logicielle, conditionnée par le traitement de signal de mesure, de l'unité électronique (2).
PCT/EP2015/066266 2014-08-18 2015-07-16 Procédé de test d'un appareil de terrain WO2016026620A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014111758.1 2014-08-18
DE102014111758.1A DE102014111758A1 (de) 2014-08-18 2014-08-18 Verfahren zum Überprüfen eines Feldgerätes

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Publication Number Publication Date
WO2016026620A1 true WO2016026620A1 (fr) 2016-02-25

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WO2022218644A1 (fr) * 2021-04-14 2022-10-20 Endress+Hauser SE+Co. KG Procédé de contrôle d'un trajet de signal d'un circuit de capteur électronique pour un appareil de terrain dans une technologie d'automatisation

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DE102018126765A1 (de) * 2018-10-26 2020-04-30 Phoenix Contact Gmbh & Co. Kg Messgerät
DE102019106566B3 (de) 2019-03-14 2020-09-10 Samson Aktiengesellschaft Konfiguration eines zweipoligen Eingangs

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EP0929850A1 (fr) * 1996-10-04 1999-07-21 Fisher Controls International, Inc. Dispositif local et diagnostics de processus sur reseau a commande de processus a fonctions de commande reparties
EP1226477A2 (fr) * 1999-10-18 2002-07-31 Rosemount Inc. Interface amelioree pour la gestion de definitions test
DE102004037064A1 (de) * 2004-07-30 2006-02-16 Abb Patent Gmbh Verfahren und Einrichtung zur Funktionsprüfung eines Feldgerätes vor dessen Erstinbetriebnahme
DE102005029615A1 (de) * 2005-06-23 2007-01-04 Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG Verfahren zur Erkennung von Bauteilefehlern einer analogen Signalverarbeitungsschaltung insbesondere für einen Messumformer
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