WO2012065808A1 - Procédé d'établissement d'un diagnostic d'un appareil de terrain - Google Patents

Procédé d'établissement d'un diagnostic d'un appareil de terrain Download PDF

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Publication number
WO2012065808A1
WO2012065808A1 PCT/EP2011/068493 EP2011068493W WO2012065808A1 WO 2012065808 A1 WO2012065808 A1 WO 2012065808A1 EP 2011068493 W EP2011068493 W EP 2011068493W WO 2012065808 A1 WO2012065808 A1 WO 2012065808A1
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WIPO (PCT)
Prior art keywords
field device
diagnostic
field
communication unit
diagnostic message
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PCT/EP2011/068493
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German (de)
English (en)
Inventor
Vincent De Groot
Andreas BÜCHIN
Jörg REINKENSMEIER
Original Assignee
Endress+Hauser Process Solutions Ag
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Publication of WO2012065808A1 publication Critical patent/WO2012065808A1/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
    • G05B19/0428—Safety, monitoring
    • 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
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
    • G05B23/0262—Confirmation of fault detection, e.g. extra checks to confirm that a failure has indeed occurred
    • 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
    • G05B2219/31483—Verify monitored data if valid or not by comparing with reference value
    • 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
    • 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
    • G05B2219/37—Measurements
    • G05B2219/37494—Intelligent sensor, data handling incorporated in sensor

Definitions

  • the present invention relates to a method for generating a diagnosis of a field device of a system of process automation technology, which has a plurality of field devices communicating with each other in communication.
  • field devices are often used to detect and / or influence process variables.
  • Sensors such as level gauges, flowmeters, pressure and temperature measuring devices, pH redox potential measuring devices, conductivity measuring devices, etc., which record the corresponding process variables level, flow, pressure, temperature, pH or conductivity, are used to record process variables.
  • actuators such as valves or pumps, via which the flow of a liquid in a pipe section or the level in a container can be changed.
  • field devices are all devices that are used close to the process and that provide or process process-relevant information. A variety of such field devices is manufactured and sold by the company Endress + Hauser.
  • the higher-level units are control systems or control units, such as PLC (Programmable Logic Controller) or PLC (Programmable Logic Controller).
  • PLC Programmable Logic Controller
  • PLC Programmable Logic Controller
  • diagnostic systems In order to optimize plant availability and to minimize the risk of failure, modern systems use diagnostic systems in the field of individual field devices as well as partially for parts of the plant or the entire plant.
  • various properties of the field device itself as well as properties of a process in the area in which the field device is used are usually monitored as part of self-monitoring.
  • the state information of the field device obtained from self-monitoring is used for self-diagnosis in the field device.
  • the diagnostic information is provided in the field device by corresponding parameters (also referred to as diagnostic parameters). Diagnostic information can be transmitted in the form of device diagnostic messages to a higher-level unit which requires the diagnostic information to perform its functions, such as condition monitoring, process control, etc.
  • the transmission can vary depending on the configuration of the system, depending on the fieldbus system used, process, etc.
  • the transmission can be event-oriented, for example, only at occurrence. th a diagnostic event (which, for example, in a significant change in a diagnostic parameter or in exceeding a limit value of a diagnostic parameter), and / or carried out by a regularly performed by a higher-level unit query diagnostic information of the individual field devices.
  • the system operator can be prompted by such device diagnostic messages to initiate certain steps (such as maintenance, repair, etc.).
  • steps such as maintenance, repair, etc.
  • the occurrence of such device diagnostic messages often results in the initiation of further steps (for example, requesting further detailed information, documentation of the diagnostic information that arises, indication of a maintenance requirement, etc.).
  • the initiation of further steps is not necessary, often even disadvantageous, since the respective device diagnostic message (s) is / are exclusively due to the state of the system and there is no defect to be remedied.
  • the initiation of further steps due to a device diagnostic message such as the complete or partial shutdown of the plant, the implementation of repair or maintenance, etc., is associated with additional effort and costs.
  • the object of the present invention is to provide a method by which a system operator of a system of process automation technology and / or a higher-level unit of a system of process automation technology facilitates the evaluation of the device diagnostic messages provided by field devices.
  • a method for establishing a diagnosis of a field device of a plant of the process automation technology which has a plurality of field devices communicating with one another in communication.
  • the method has the following steps:
  • a device diagnostic message generated in the field device is automatically validated, with information relating to the system status of at least one further field device of the system, in particular of several other field devices of the system, being included in this validation.
  • information relating to the system state of at least one further field device of the system is input into the diagnostic validation algorithm and thus also determines the result of the application of the diagnostic validation algorithm.
  • the "information relating to the physical state of at least one further field device” is information that originates from the area of this at least one further field device, which not only influences the immediate vicinity or area of the field device but also external influencing variables.
  • the diagnostic validation algorithm it is possible to determine in advance which information relating to the plant state is to be included in the validation and, under soft conditions, to discard certain (or even all) generated device diagnostic messages of the relevant field device In use, it can then be determined in a simple manner whether a device diagnostic message generated in a field device as part of a self-diagnosis is represented by a m At present, the system state was triggered and whether this device diagnostic message should be rejected in the specific case or alternatively evaluated.
  • the present invention can be ensured in a simple manner that device diagnostic messages that are triggered by the current process and / or plant state (which is generally referred to as "plant state" in the present context) are not evaluated, but discarded if certain conditions exist Consequently, the present invention can prevent a system operator and / or a higher-level unit, which evaluates device diagnostic messages from field devices of the system, from being burdened with "superfluous" device diagnostic messages.
  • Plant conditions in which certain device diagnostic messages are to be rejected by one or more field devices of a plant for example, in a maintenance of parts of the system, in a cleaning of parts of the system, especially in a flushing process of pipelines, in a temporary emptying of a plant at a temporary plant downtime, during a filling process, etc., exist.
  • Such plant states can often be ascertained on the basis of information relating to the plant state of at least one further field device, for example by means of a control command sent to a flush valve that it be open, by means of a control command sent to a pump that the pumping operation is to be set ( to temporarily shut down the system), etc.
  • the diagnostic validation algorithm associated with a field device can be configured in such a way that all device diagnostic messages generated by the relevant field device can be discarded in the case of certain system states.
  • the diagnostic validation algorithm associated with a field device can be configured such that, for certain system states, only certain device diagnostic messages generated by the relevant field device are to be discarded while other device diagnostic messages generated by the field device in question are to be evaluated.
  • Field device refers in particular to a sensor and / or actuator (eg, a valve, an actuator, etc.) Generally, field devices are also those devices which are connected directly to a field bus and for communication with a higher-level unit (eg a PLC), such as remote I / Os, gateways, linking devices In accordance with an advantageous development, “field device” refers exclusively to a sensor and / or actuator.
  • a higher-level unit eg a PLC
  • Communication means that the field devices are connected to each other via a fieldbus and / or a network, whereby the connection can be wired or wireless, although it is not absolutely necessary for the field devices to be able to communicate directly with each other (but instead) For example, each communicating with a process control unit.)
  • the present invention can be implemented independently of the fieldbus system (s) (eg, Profibus®, Foundation® Fieldbus, HART®, etc.) used in the respective plant.
  • the device diagnostic messages of a field device only have diagnostic information relating to the characteristics of the field device itself and / or properties of a process in the area in which the field device is used. This diagnostic information is obtained in particular from a self-monitoring carried out in the relevant field device. These diagnostic information contained in device diagnostic messages are sometimes referred to as device-related diagnostic information.
  • An "automated implementation" of the respective steps is understood to be without human intervention, in particular by hardware and / or software.
  • the device diagnostic message is provided for further evaluation only if the step of determining results in the device diagnostic message being evaluated.
  • it can be provided internally for evaluation in the device in which the step of "determining" is carried out and / or it can be provided to a separate device for evaluation.
  • Condition Monitoring Unit An asset management system (English: asset management system, short: AMS), a visualization system, etc., take place.
  • only state information of the field device which is obtained from a self-monitoring of the field device is used in the step of the automated creation of the device diagnostic message.
  • properties of the field device itself as well as properties of a process in the area in which the field device is used are monitored. Based on the status information obtained therefrom, which may possibly also be processed and / or evaluated, the device diagnostic message is then generated in the field device.
  • such information is used to record the system status, which information is exchanged in a communication, in particular in the course of a cyclical communication, with at least one further field device of the system.
  • this involves information that is exchanged with the individual field devices in a communication as part of a process control (which is performed by a process control unit).
  • the information relating to the system state of at least one further field device of the system has at least one of the following information:
  • a status information transmitted with a measured value indicates whether the measured value can be used, which is the case in particular with the status "good", or whether the measured value
  • a limited usability is usually indicated by the status "uncertain” (German: unsafe).
  • the steps of automated application and automated determination are carried out in the field device itself. This ensures that only such device diagnostic messages via the fieldbus (for example, to a process control unit and / or a condition monitoring unit) are transmitted, which are actually intended for evaluation.
  • step B the relevant field device is designed accordingly and that the information required for carrying out the steps of applying and determining (step B) is transmitted to the field device, which leads to increased bus traffic.
  • This transmission can take place, for example, by a process control unit which carries out a process control with respect to at least one part of the installation.
  • the steps of the automated application and the automated determination (step B)), which is referred to as "validation” below, are performed by a communication unit that is in communication connection with this field device and with other field devices of the plant the advantage that a field device designed accordingly for the validation (step B) is not required, Furthermore, it can be realized in a simple manner that the communication unit validates (step B)) device diagnostic messages of several, in particular all, field devices The information required for the validation with regard to the plant state must therefore be transmitted only to this one communication unit, so that the bus traffic is reduced.
  • “communication unit” refers to a unit (designed separately from the field devices, in particular sensors and actuators, of the system), by means of which the validation (ie the implementation of step B) can be carried out and thus with the relevant one , their associated field device (s) is in communication connection and can communicate that they can at least receive telegrams containing a device diagnostic message from this / these field device (s)
  • the communication unit with the field devices of the system in The communication connection can be implemented in various ways, for example, it can only run over a fieldbus (if the communication unit is directly connected to the relevant fieldbus) is she but can also run at least partially over a higher-level network (eg Ethernet®) (if, for example, the communication unit is connected to a higher-level network).
  • the communication link is wired and / or wireless.
  • a plurality of diagnostic validation algorithms associated with the respective field devices are managed in the communication unit, wherein device diagnostic messages of this field device can be validated by including at least one further field device of the plant, including information relating to the plant state.
  • the communication unit is on a, received by the communication unit device diagnostic message of a field device belonging to this field device diagnostic validation algorithm, enter the information regarding the system state of at least one other field device of the system, applicable and can be determined from whether to evaluate the received device diagnostic message or to be rejected.
  • corresponding diagnostic validation algorithms are managed in the communication unit for all field devices of the system and that the communication unit is in communication connection with all field devices of the system.
  • corresponding diagnosis validation algorithms can also be managed in the communication unit only to a part of the field devices of the system.
  • Each diagnostic validation algorithm (or diagnostic validation rule) is formed, in particular, by a suitably designed program module that can be executed within the communication unit.
  • the diagnostic validation algorithms can be loaded individually as desired by a user in the communication unit.
  • the selection of the diagnostic validation algorithms managed in the communication unit takes place, in particular, as a function of the field devices used in the respective system (and whose device diagnostic messages are to be processed in the communication unit).
  • the step of determining that the device diagnostic message of a field device is to be evaluated then it can be provided internally in the communication unit for evaluation and / or it can be provided to a higher-level unit, which requires the device diagnostic message to perform its tasks.
  • the evaluation of the device diagnosis message can be carried out, in particular, in a condition monitoring unit, an asset management system (English: Asset Management System, AMS), a visualization system, etc.
  • the communication unit is operated in a listener mode in which it overhears at least the messages sent and / or received by a part of the field devices of the system, in particular of all field devices of the system.
  • the communication unit is fertilized via the device diagnostic device transmitted via the fieldbus, and information about the system state is provided by the respective field devices, without the bus traffic being additionally burdened by requests from the communication unit.
  • a diagnostic event which may for example consist of a change of a diagnostic parameter
  • a process control unit sends a diagnostic request to the device field device sets and the field device then transmitted a device diagnostic message via the fieldbus.
  • the individual field devices regularly (in particular as part of the cyclical data traffic) send device diagnostic messages to a process control unit.
  • the communication unit can monitor and receive all messages that are received via the fieldbus or the network to which the communication unit is connected. This can be realized, in particular, by virtue of the fact that a communication interface of the communication unit via which it is connected to the fieldbus or network receives all telegrams transmitted via the relevant fieldbus or the relevant network independently of their destination address.
  • the communication unit then checks the user data of the received messages as to whether they contain a device diagnostic message and / or information relating to the system status of at least one further field device which requires the communication unit to carry out the validation. If this is the case, then this device diagnostic message and / or information in the communication unit are utilized.
  • the communication unit If the communication unit is operated exclusively in such a listener mode (ie the communication unit does not actively send messages), then the communication unit need not be made known to the other devices connected to the respective fieldbus or network, so that the required configuration for the additional Introducing the communication unit in an existing system is low. Additionally or alternatively, it is provided according to a development that the communication unit actively provides a diagnosis request to at least one field device of the system in order to receive in response thereto a device diagnostic message of this field device. Furthermore, it can be provided that the communication unit actively makes a request (to the relevant field device and / or to a process control unit) in order to respond to the request for the validation. information about the system status of at least one further field device. Such requests can be made in particular in the context of an acyclic communication.
  • the communication unit is formed by a process control unit which carries out a process control with respect to at least part of the field devices of the installation, in particular by a programmable logic controller (PLC).
  • PLC programmable logic controller
  • the equipment of the process control unit with this additional functionality makes it possible to keep the number of required devices as well as the required configuration effort for the system low.
  • the process control is carried out by the process control unit, in particular measured values which are detected by individual field devices (sensors) are transmitted to the process control unit, and the process control unit issues control commands to field devices (actuators) as a function of these measured values.
  • the process control unit information regarding the state of the plant can be detected and evaluated by the various field devices of the system in a simple manner.
  • the process control unit carries out a process control with respect to all field devices of the plant.
  • the communication unit is formed by a condition monitoring unit which carries out a condition monitoring with respect to at least a part of the field devices of the installation.
  • a condition monitoring unit evaluates device diagnostic messages of the field devices of the system within the framework of the condition monitoring carried out by the latter. Accordingly, device diagnostics messages from field devices may first be validated (step B) before being evaluated in the condition monitoring unit.
  • the condition monitoring unit preferably carries out a condition monitoring of all field devices of the installation.
  • condition monitoring As part of condition monitoring, which is sometimes also referred to as status monitoring or diagnostic monitoring, diagnostic information from field devices of the system and, if necessary, other process information (measured values, control signals, etc.) transmitted by the individual field devices of the system are evaluated and then monitored, whether these or derived variables are each in a desired range.
  • the condition monitoring unit in particular provides an overview of the information devices connected to the plant field devices and their condition.
  • the condition monitoring unit can create and update a list of field devices that are connected to the system in terms of information technology, also referred to as "LiveList.”
  • LiveList information technology
  • the condition monitoring unit can in particular display their device diagnosis messages, notes for maintenance and / or service and, if appropriate, other information.
  • a system structure and a bus topology of the system are detected and updated by the condition monitoring unit.
  • the condition monitoring unit can also perform other functions, such as archiving data, visualizing information, creating trends, asset management, etc.
  • the communication unit is formed by a communication unit formed separately from a process control unit and separately from a condition monitoring unit of the installation, which has a fieldbus interface for connection to a fieldbus and correspondingly designed electronics for carrying out the validation (step B))
  • a communication unit formed in this way can be connected to the respective fieldbus of the installation to which the other field devices of the installation (directly or via another fieldbus) are connected, and it can be assigned a fieldbus address.
  • the communication unit can in particular be designed in such a way that, in addition to performing the method according to the invention (if appropriate also according to the further developments and / or variants described), it can also perform further functions in the system, such as the functions of a gateway.
  • the communication unit can in particular be equipped with a powerful processor and with an operating system.
  • the communication unit can in particular be designed in such a way and the system can be configured so that it can also actively send requests, in particular diagnostic requests, to the individual field devices.
  • the diagnostic validation algorithms are each specific to the field device type of the respectively associated field device. This means that the diagnostic validation algorithms are specifically adapted to the respective field device type and that diagnostic validation algorithms from different field device types generally differ from one another. This is advantageous since, as a rule, different device diagnostic messages are also generated by field devices of different field device type.
  • the diagnostic validation algorithms are each specific to the set operating mode and / or the respective operating conditions of the respectively associated field device.
  • the operating mode is usually determined by the respective parameter settings of the field device. In this case, it can be determined, for example, in which measuring mode the field device is operated, which measured values are detected and provided by the field device, etc.
  • diagnostic messages generated by a field device may vary and / or their relevance and meaning may vary. Accordingly, a specific adaptation of the diagnostic validation algorithms to the respective operating mode and the respective operating conditions is required. geous. As a general term for "specific for the set operating mode and / or the respective operating conditions" is sometimes the term "instance-specific" used.
  • the communication unit is designed such that settings can be made by the user for the respective diagnostic validation algorithms managed in the communication unit. These are, in particular, settings which can be used to determine the effects of the respective information relating to the plant state on the validation of the individual device diagnostic messages of the relevant field device. This option is particularly advantageous for allowing changes to the settings depending on the instance-specific conditions.
  • the communication unit can in particular provide a graphical user interface (GUI).
  • GUI graphical user interface
  • information for device integration of a field device in particular a device description and / or a device driver, comprise the diagnostic validation algorithm associated with this field device.
  • device integration information of a field device (English name: means for device integration)
  • Information about device integration includes, in particular, the input and output supplied by the field device concerned Output signals, information relating to communication of the field device via a fieldbus, parameters provided in the field device, status and diagnostic information provided by the field device, data and rules for processing operations (eg, configuration, calibration), and information about user dialogues, etc.
  • DD Device Description
  • the device description is usually created in text-based form (eg in ASCII text format).
  • different device description languages are used, such as the Foundation Fieldbus Device Description Language, GSD / Profibus (General Station Description), etc.
  • the information provided in the device description is usually interpreted by an interpreter and provided to an operator program that forms a frame application for the device description.
  • information for device integration of a field device can also be formed, for example, by a device driver of the field device, in particular a "Device Type Manager” (DTM)
  • DTM Device Driver of the field device
  • a device driver in particular a "Device Type Manager”
  • a device-specific software that encapsulates data and functions of the field device and provides graphical controls.
  • Such a device driver requires a corresponding frame application for execution; for example, a "Device Type Manager” requires an FDT to execute.
  • Frame application FDT: Field Device Tool
  • An operating program that forms such an FDT frame application is, for example, "FieldCare®” from Endress + Hauser.
  • the device diagnostic messages generated by a field device usually differ depending on the field device type, depending on the manufacturer and often also depending on the device version of the field device. Accordingly, the device diagnostic messages generated by a field device are typically field device specific. Only recently have uniform diagnostic concepts been developed in which uniform, field device type-spanning device diagnostic messages have been defined. Such a diagnostic concept is described in particular in NAMUR Recommendation NE 107, according to which device diagnostic messages are to be categorized into exactly one of four field device status classes ("Maintenance Requirement", "Out of Specification”, “Function Control” and “Failure”).
  • field device-specific device diagnostic messages of this field device are assigned to corresponding field device type cross-Ge by a diagnostic transformation algorithm associated with a field device rätediagno- messages can be mapped.
  • the communication unit performs the following steps in the case of a received field device-specific device diagnostic message of a field device of the system:
  • the field device type-comprehensive device diagnostic messages can have, for example, the four field device status classes described in NAMUR Recommendation NE 107.
  • the steps C) and D) can be carried out in parallel, before or after the step of validation (step B)).
  • the diagnostic transformation algorithm of a field device is integrated in each case into the diagnostic validation algorithm of this field device and, accordingly, these two algorithms are executed in parallel.
  • the steps C) and D) are in particular carried out automatically.
  • the present invention further relates to a communication unit for use in a system of process automation technology, wherein the communication unit has at least one communication interface, via which it can be brought in use in communication with a plurality of field devices of the system.
  • the communication unit a plurality of diagnosis validation algorithms associated with respective field devices are managed, whereby device diagnostic messages of this field device can be validated by at least one additional field device of the plant by means of a diagnosis validation algorithm associated with a field device are.
  • the communication unit is designed in such a way that, during use, a device diagnosis message of a field device of the system can be received via the communication interface such that the device diagnostic message of the diagnosis validation algorithm associated with this field device including information regarding the system state of at least one further field device Applicable and it can be determined from this whether the device diagnostic message is to be evaluated or rejected.
  • FIG. 1 shows an exemplary representation of a system of process automation technology for explaining an embodiment of the method according to the invention.
  • FIG. 2 shows a schematic representation to illustrate the validation when carrying out the method according to the invention.
  • FIG. 1 shows by way of example a system of process automation technology 2.
  • the system 2 has a field bus 4, which is designed as a Profibus® DP fieldbus 4, on.
  • a process control unit 6 which is designed as a PLC (programmable logic controller), a condition monitoring unit 8, a field device 10, a link 12 (German: connection device) and a gateway 14 (German: Network coupler) connected.
  • Link 12 establishes a connection to a Profibus® PA fieldbus 16 to which another field device 18 is connected.
  • a connection to a wireless HART® fieldbus network 20 is established, the three other field devices 22, 24 and 26 belong.
  • Sending and receiving messages between the gateway 14 and the field devices 22, 24 and 26 are wireless, as shown schematically in Fig. 1 by antennas 28 on the gateway 14 and the field devices 22, 24 and 26. Other field devices, devices or fieldbuses can also be connected to the individual fieldbuses.
  • the process control unit 6 performs process control with respect to the field devices 10, 18, 22, 24, 26.
  • the condition monitoring unit 8 performs state monitoring with respect to all the field devices 10, 18, 22, 24, 26. As explained above, the condition monitoring unit 8 checks in particular whether work is being carried out within a desired range in each case.
  • the condition monitoring unit 8 also has a functional unit 30 (schematically represented by box 30 in FIG.
  • condition monitoring unit 8 has a functional unit 36 (shown schematically in Fig. 1 by box 36), through which, as will be explained in more detail below, the validation (step B)) of device diagnostic messages from field devices is feasible by the state monitoring unit 8 a graphical user interface 38 is a user provided over which he can make general settings relating to the functions of the condition monitoring unit 8.
  • a module 40 of the graphical user interface 38 adjustments can be made by a user with regard to the implementation of the method according to the invention, in particular with regard to the diagnostic validation algorithms.
  • the field devices 10, 18, 22, 24, 26 each perform a self-monitoring and transmit, as will be explained in detail below, when a diagnostic event occurs (for example failure of a sensor) a device diagnostic message to the process control unit 6.
  • a diagnostic event for example failure of a sensor
  • the process control unit 6 become the field devices 10, 18, 22, 24, 26 associated diagnostic validation algorithms 42, which are shown schematically in Fig. 2, managed.
  • diagnostic validation algorithm associated with a field device by applying a diagnostic validation algorithm associated with a field device to a device diagnostic message of this field device, including information regarding the plant state of at least one further field device of the system, it can be determined whether the relevant device diagnostic message is to be evaluated or rejected.
  • the diagnostic validation algorithms are specific to each field device type. Furthermore, they can also be adapted by a user to be instance-specific via the graphical user interface 38 (in particular the module 40). Furthermore, further diagnostic validation algorithms can be loaded into the condition monitoring unit 8 by a user via the graphical user interface 38. This is necessary, for example, if another field device is to be added to the system 2.
  • the field device 10 is formed by an ultrasonic fill level sensor 10 which, in use, detects the fill level of a large container filled with bulk material. Through a filling process of the container occurs such a high dust formation that in the ultrasonic level sensor 10 no reflected ultrasonic signal is more detectable. The absence of the reflected ultrasonic signal is detected in the ultrasonic level sensor 10 in the context of self-monitoring and created a corresponding self-diagnosis.
  • the process control unit 6 carries out a cyclical data exchange (DATA EXCHANGE) with the ultrasonic level sensor 10 (and the other field devices of the system). In particular, it regularly requests a fill level measurement value from the ultrasonic fill level sensor 10. Since a diagnostic event (here: absence of the reflected ultrasound signal) has occurred in the ultrasonic fill level sensor, this diagnostic event is indicated by the field device 10 responding to a request telegram (DATA_EXCH.req) of the process control unit 6 with a response telegram (DATA_EXCH .res) with high priority.
  • DATA EXCHANGE cyclical data exchange
  • the process control unit 6 Upon receiving a telegram with high priority, the process control unit 6 sends to the field device 10 a diagnostic request telegram (SLA-VE_DIAG.req). In response to this, the field device 10 sends diagnostic information in the form of a device diagnostic message in a diagnostic response telegram (SLAVE_DIAG.res).
  • the condition monitoring unit 8 is operated in a listener mode in which it listens to all messages transmitted via the Profibus® DP fieldbus 4 and then checks whether these contain a device diagnostic message of a field device.
  • the condition monitoring unit 8 receives the telegram of the ultrasonic level sensor 10 with the device diagnostic message. The validation of the received device diagnostic message of the ultrasonic level sensor 10 performed in the condition monitoring unit 8 will be explained with reference to FIG.
  • the device diagnostic message of the ultrasonic level sensor 10 is referred to in Fig. 2 with DIAG.
  • the functional unit 36 determines that it has to apply the diagnostic validation algorithm associated with the ultrasonic level sensor 10 for the validation (step B)).
  • the diagnostic validation algorithm of this ultrasonic fill level sensor 10 it has been taken into account that no reflected ultrasound signal can be detected temporarily in the ultrasound fill level sensor 10 when the associated container is regularly filled at relatively long intervals due to the development of dust.
  • the diagnostic validation algorithm (as information regarding the system state of at least one other field device of the system) also on whether a valve disposed in a filling line of the valve is open. This valve is presently formed by the field device 22.
  • the condition monitoring unit 8 listens to all messages transmitted via the Profibus® DP fieldbus 4 and then examines them to see whether a control command for opening the valve 22 has been sent from the process control unit 6 to the valve 22. In the present case this is the case.
  • This information regarding the equipment status of the further field device (valve 22) is designated "PARI" in Fig. 2.
  • the validation (step B)) can also be carried out This is illustrated schematically in Fig. 2 by further inputs PAR2 and PAR3, in addition to the input PARI in the functional unit 36.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

La présente invention concerne un procédé pour établir un diagnostic d'un appareil de terrain (10) d'une installation (2) pour l'automatisation de processus, cette installation présentant une pluralité d'appareils de terrain (10, 18, 22, 24, 26) en liaison de communication les uns avec les autres. Ledit procédé comprend les étapes suivantes : l'établissement automatisé d'un message de diagnostic d'appareil dans l'appareil de terrain (10) dans le cadre d'un autodiagnostic de l'appareil de terrain (10); et l'application automatisée d'un algorithme de validation de diagnostic, qui est associé à l'appareil de terrain (10) et dans lequel interviennent des informations concernant l'état d'au moins un autre appareil de terrain (18, 22, 24, 26) de l'installation (2), au message de diagnostic d'appareil et, à partir de cela, détermination automatisée de la nécessité d'évaluer ou de rejeter le message de diagnostic d'appareil.
PCT/EP2011/068493 2010-11-19 2011-10-24 Procédé d'établissement d'un diagnostic d'un appareil de terrain WO2012065808A1 (fr)

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DE102010044184.8A DE102010044184B4 (de) 2010-11-19 2010-11-19 Verfahren und Kommunikationseinheit zum Erstellen einer Diagnose eines Feldgerätes

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DE102014102797A1 (de) * 2014-03-03 2015-09-03 Endress + Hauser Process Solutions Ag Verfahren zum Überprüfen eines Messgerätes
DE102016124162A1 (de) * 2016-12-13 2018-06-14 Endress+Hauser Process Solutions Ag Verfahren zur applikationsspezifischen Einstellung eines Feldgeräts
CN110214295A (zh) * 2016-12-28 2019-09-06 Abb瑞士股份有限公司 用于现场装置的验证的装置和方法
JP6863341B2 (ja) * 2018-06-28 2021-04-21 横河電機株式会社 フィールド機器、フィールド機器の診断方法および診断装置
DE102020212313A1 (de) 2020-09-30 2022-03-31 Siemens Mobility GmbH Verfahren zur Diagnose eines Betriebszustands von Feldgeräten eines industriellen Systems

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WO2008151971A1 (fr) * 2007-06-11 2008-12-18 Endress+Hauser Gmbh+Co.Kg Appareil de terrain comprenant une unité de mise en oeuvre de procédés de diagnostics
EP2230577A1 (fr) * 2009-03-17 2010-09-22 Siemens Aktiengesellschaft Procédé de diagnostic pour un système de bus de terrain exécuté selon la norme interface AS

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US10503224B2 (en) 2016-06-23 2019-12-10 Krohne Messtechnik Gmbh Method for operating a flowmeter and flowmeter

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