KR102402846B1 - Process Automation Modular Unit Interoperability Method using PDT Information Model - Google Patents

Abstract

A method is provided that enables vertical/horizontal interoperability/Plug&Works throughout the entire manufacturing life cycle by establishing a standard information model between continuous process modularization facilities. Factory asset management method according to an embodiment of the present invention includes collecting information models for assets in the factory; generating a server by using the collected information models; Including, by driving the created server to manage the assets in the factory, the assets are layered, and the information models are defined as the same type regardless of the layer of the asset.
Thereby, by using the standard information model between the continuous process modularization facilities, it is possible to enable horizontal interoperability between assets in the continuous process and vertical interoperability between the assets and the upper operating system level, and further, flexible process change.

Description

Process Automation Modular Unit Interoperability Method using PDT Information Model

The present invention relates to a smart factory-related technology, and more particularly, to an interoperability method using a standard information model for major equipment such as a stirrer and an injector in the field of continuous process (Process Automation).

The existing continuous process industry field has a relatively large process scale compared to other manufacturing industry fields (eg, discrete process) and has a structure in which a number of facilities and devices are integrated into one distributed control system. difficult.

Recently, the need for a process technology and structure that can respond to small-lot production of various types is emerging in accordance with changes in the market flow that must satisfy the various requirements of consumers. having difficulty responding.

In addition, the current continuous process industry with a huge and strict structure, which requires mutual fusion and interworking of heterogeneous facilities of various manufacturers, requires a lot of engineering cost, time, and labor throughout the product life cycle, from design and commissioning of facilities to production and service. causes

The present invention has been devised to solve the above problems, and the object of the present invention is to establish a standard information model between continuous process modularization facilities, and vertical/horizontal interoperability/ It is to provide a method to enable Plug&Works.

According to an embodiment of the present invention for achieving the above object, a factory asset management method includes: collecting information models for assets in a factory; generating a server by using the collected information models; Including, by driving the created server to manage the assets in the factory, the assets are layered, and the information models are defined as the same type regardless of the asset layer.

The assets may include at least one unit, at least one equipment constituting the unit, and at least one device constituting the equipment.

The device may include at least one Value in which a control attribute of the device or an acquired value of the device is recorded.

The information model may include a management model in which management information of assets is recorded.

The management model includes a fixed value and a variable value, and the change value may be updated by receiving from the operating system.

The fixed value may include a value for at least one of asset name, unique number, and manufacturer, and the variable value may include a value for at least one of usage time and state.

Assets are modeled in AML, the model values are implemented in the form of OPC UA Node information, and the creation step can create a server by AML-to-OPC UA conversion.

The management phase may manage interoperability between assets and interoperability between assets and an operating system.

At least one unit may be a unit for performing a continuous process.

According to another aspect of the present invention, a communication unit for collecting information models for assets in the factory; A processor that configures a server using the information models collected through the communication unit, and drives the configured server to manage the assets in the factory; includes, the assets are layered, and the information models are the same regardless of the layer of the asset A factory asset management system is provided, characterized in that it is defined as a type.

According to another aspect of the present invention, the method comprising: collecting information models for assets in a factory; Using the collected information models, managing the assets in the factory; including, the assets, are hierarchical, and the information models, the factory asset management method, characterized in that the same type is defined irrespective of the asset hierarchy this is provided

According to another aspect of the present invention, a communication unit for collecting information models for assets in the factory; and a processor for managing assets in the factory by using the collected information models, wherein the assets are layered, and the information models are defined as the same type regardless of the asset hierarchy. system is provided.

As described above, according to the embodiments of the present invention, horizontal interoperability between assets in a continuous process and vertical interoperation between assets and an upper operating system level, further, using a standard information model between continuous process modularization facilities Flexible process changes can be made possible.

Accordingly, according to the embodiments of the present invention, it is possible to reduce engineering costs and labor time through flexible process technology, and it is possible to respond to manufacturer-independent interoperability and multi-variety small-volume production requirements, and to go beyond the existing industrial solution area. Extension linkage with various service platforms becomes possible.

1 is an ISA-95 based architecture configuration;
2 is a detailed analysis of ISA95 and PDT development scope;
3 shows the IEC62714 architecture;
4 is an IEC62541 (OPC UA) architecture;
5 is an IEC72714, IEC62541 fusion structure;
6 is a modeling architecture (based on Reactor Unit)
7 is Reactor Unit AML modeling,
8 is a mixing Equipmen AML modeling;
9 is a detailed Attribute of Management Lib.
10 is an Aggregation Server definition and detailed URL;
11 is UA Server information of the connected equipment;
12 is a Reactor Unit PDT information model AML file conformance test result;
13 is a supply unit PDT information model AML file conformance test result,
14 is a continuous process plant asset management system.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

In an embodiment of the present invention, a standardized information model for the assets of a continuous process is presented, and through this, a method for securing factory flexibility and enabling manufacturer-independent interoperability by physically modularizing the assets is presented. do.

1. PDT (Process Device Type) information model related standard technology

1.1 ISA95

ANSI/ISA-95 or ISA-95 is the International Automation Association's international standard for developing automated interfaces between enterprises (business logic) and control systems (control logic).

1 is an ISA-95 based architecture configuration. In the embodiment of the present invention, in order to build a PDT information model, as shown in FIG. 2, the architecture of the real asset in the factory was rearranged in module unit based on ISA-95, and modularization and PDT of the facility The range to which the information model is applied is selected in red.

1.2 IEC62714 AutomationML Architecture

AutomationML is an extensible, open, neutral and free data exchange format standardized in IEC 62714, and is an XML-based standard technology to support data exchange in a heterogeneous engineering tool environment.

Through the meta model provided by this standard technology, the structure of the production system can be modeled as a hierarchy of AutomationML objects, and relationships between shape and kinematics, logic data (action and sequencing), operation data, and AutomationML objects can be defined.

RC (RoleClasses): You can model the semantics of AutomationML objects, and RoleClass describes the functions of a physical or logical object independent of the technical implementation. Provides functionality to specify objects in an abstract way and independently of manufacturers, and the semantics of each object are stored in the RoleClass library.

IC (InterfaceClasses): You can model the meaning of the interface of AutomationML object. An "interface-class" describes a reference to a document or relationship of a physical object or a logical object, independent of the technical implementation, and is stored in the interface class library.

SUC (SystemUnitClasses): You can model the types or templates of AutomationML objects. Object types and templates are stored in the system unit class library.

IH (InstanceHierachy): Saves the project.

1.3 IEC62541 (OPC UA)

OPC UA refers to a technology that supports vertical and horizontal connections between components, applications and functions, and covers all industrial areas such as industrial sensors and actuators, control systems, Manufacturing Execution Systems (MES) and Enterprise Resource Planning (ERP) systems. It can be applied to the components of

- IEC62541 (OPC UA) architecture

The IEC62541 (OPC UA) architecture is an information model representing structure, behavior and semantics. It defines an interface model that allows applications to interact, a communication model for transferring data between endpoints, and a conformance model to ensure interoperability between systems. do.

- IEC62541 (OPC UA) Specification configuration

The OPC UA series consists of a multi-part specification, where parts 1-7 and part 14 specify the core functions of OPC UA, and these core functions define the structure of the OPC AddressSpace and the services that operate on it.

IEC 62541-14 defines the OPC UA publish subscription pattern in addition to the client-server pattern defined by the services of IEC 62541-4. Parts 8-11 cover core functionality by separate OPC COM specifications such as data access (DA), alarms and events (A&E), and historical data access (HDA). IEC 62541-4 describes the discovery mechanism of OPC UA and IEC 62541-13 describes the data aggregation method.

1.4 IE62714, IEC62541 convergence technology research

Hereinafter, the weaknesses of each standard technology through standard convergence are complemented, and the PDT methodology to be used in the embodiment of the present invention is presented based on this.

IEC62714 provides not only the definition of the configuration structure of assets in the process, but also the manufacturing-related vertical and horizontal information that can contain sequence for control, machine information of HW, and other XML techniques, and various information across the time domain (design to service). It can be included, but there is a limit in the solutionization part of the information model itself.

And, although IEC62541 can model data by itself, it is limited in the modeling range for small-scale assets (mainly sensor and actuator units), so there is a limitation in describing large-scale information models of equipment or process units.

Due to the limitations of each standard, various data inside the IEC62714 information model are described in the UEC62541 format, and a layer-independent interface between assets is constructed by parsing based on the node description information.

For this, COLLADA, PLC Open XML and other data of IEC62714 are modeled in the form of OPC UA Node information, and direct linkage is made possible from the information model to the solution through the information.

2. PDT information model

The PDT information model presented in the embodiment of the present invention is based on the reactor equipment (Reactor Unit) and injection or discharger (Supply Unit or Receive Unit) that are universally used for continuous processes, and generalizes equipment and controls and monitoring. It was modeled by deriving a key factor for

However, the continuous process corresponds to an example of a field to which the present invention is applicable, and it goes without saying that the technical idea of the present invention can be applied to other processes as well.

In the PDT information model presented in the embodiment of the present invention, each factor was defined in the form of OPC UA Node, and the entire modeling was implemented in AutomationML.

2.1 Physical Object

6 is a modeling architecture (based on Reactor Unit). In the PDT information model presented in the embodiment of the present invention, assets are classified into Unit (continuous process equipment), Equipment (equipment in equipment), and Device (device in equipment). As such, Equipment consists of one or more devices.

Unit and Equipment are implemented in the form of an AML file as shown in FIGS. 7 and 8, and the same is true for Device. As shown, the types of the PDT information model of Unit, Equipment, and Device are the same. That is, the same PDT information model is applied to Unit, Equipment, and Device.

On the other hand, a device includes one or more values (detailed process values). For example, as shown in FIG. 8, PLC Device (Dev_PLC) includes modularized equipment and the value of control properties of the device, and Motor Device (Dev_Motor) and Cylinder Device (Dev_Cylinder) are values obtained from Acutator and Sensor. includes

Role and Class of Unit, Device, and Value are assigned variously such as Station, Sensor, and Actuator according to the item characteristics.

2.2 Management Object

In the PDT information model presented in the embodiment of the present invention, the management model to contain the management information of the assets in the factory is defined in the form of a library inside the RoleClassLib, and implemented so that it can be used as a reference in various assets of the InstanceHierarchy.

Detailed data consists of fixed values (DeviceName, SerialNumber, Manufacturer) and variable values (OTperMTBF, LastAlarmStatus).

- DeviceName: the name of the device or device

- SerialNumber: the manufacturer's equipment or device's unique number or the consumer's asset identification number

- Manufacturer: Manufacturer or System Integrator

- OTperMTBF: Usage time compared to product lifespan

- LastAlarmStatus: last alarm status value

Changed values can be updated from the logic implemented in various operating systems (SCADA, DCS, HMI, etc.) in the factory. For interoperability, each data is implemented in the form of OPC UA Node to read/write in the form of OPC UA. make it possible

In the case of variation values (OTperMTBF, LastAlarmStatus), it can be used as major KPIs for intelligent analysis algorithms such as predictive maintenance in the future.

2.3 Value Node Information

All variables of Physical Object and Management Object included in the PDT information model are implemented in the form of OPC UA Node information. will have

To this end, each PDT information model includes OPC UA Discovery URL (FIG. 10) information for an individual Aggregation Server role and OPC UA Server information (FIG. 11) inside a device to be connected during aggregation.

3. IEC62714 conformance tests and results

For the PDT information model presented in the embodiment of the present invention, compliance tests were performed on the Reactor Unit and Supply Unit of the continuous process using the AutomationML TestCenter tool.

The PDT information model AML file for the Reactor Unit is imported, and the inspection results derived from XML and log files that are automatically performed through the tool are as shown in FIG. 12, Errors and Warnings based on AML V2.0 and CAEX V2.15 It was confirmed that there were no abnormal results.

In addition, the PDT information model AML file for the supply unit is imported, and the inspection results derived from XML and log files that are automatically performed through the tool are also shown in FIG. It was confirmed that there were no abnormal results such as warnings.

4. Continuous process plant asset management system

14 is a block diagram of a continuous process plant asset management system according to another embodiment of the present invention.

A continuous process factory asset management system according to an embodiment of the present invention, as shown in FIG. 14 , includes a communication unit 110 , an output unit 120 , a processor 130 , an input unit 140 , and a storage unit 150 . It can be implemented as a computing system including

The communication unit 110 communicates with the assets in the continuous process plant, and collects PDT information models (AML files) for each asset.

The processor 130 generates an OPC UA server by converting the PDT information models collected through the communication unit 110 to AML-to-OPC UA, and drives the generated OPC UA server to interoperate between assets and assets in the factory. Manage interoperability between and operating systems.

The output unit 120 is a display on which performance results of the processor 130 are displayed, and the input unit 140 is a user input unit that receives a user command and transmits it to the processor 130 .

The storage unit 150 provides a storage space necessary for the processor 130 to operate and function.

5, variation

So far, a preferred embodiment has been described in detail with respect to the continuous process modularization equipment interoperability method using the PDT information model.

In an embodiment of the present invention, the PDT information model, which is a standard information model template for major equipment such as a stirrer and injector in the continuous process field, was presented. The PDT information model proposes the modularization technique of continuous process facilities based on international standard technology, and it enables Plug&Works that enables vertical/horizontal interoperability throughout the entire production cycle by establishing a standardized information model between the same facilities.

The PDT information model presented in the embodiment of this method is structurally based on the ISA95 architecture, and methodologically, based on the convergence technology of IEC62541 and IEC62714, the main equipment of the continuous process is modularized and information modeled.

Through flexible process technology based on the PDT standard information model, it is possible to reduce engineering costs and labor hours, respond to manufacturer-independent interoperability and small-volume production requirements, and expand with various service platforms beyond the existing industrial solution area Enemy linkage becomes possible.

On the other hand, it goes without saying that the technical idea of the present invention can be applied to a computer-readable recording medium containing a computer program for performing the functions of the apparatus and method according to the present embodiment. In addition, the technical ideas according to various embodiments of the present invention may be implemented in the form of computer-readable codes recorded on a computer-readable recording medium. The computer-readable recording medium may be any data storage device readable by the computer and capable of storing data. For example, the computer-readable recording medium may be a ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, hard disk drive, or the like. In addition, the computer-readable code or program stored in the computer-readable recording medium may be transmitted through a network connected between computers.

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the claims In addition, various modifications are possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

110: communication department
120: output unit
130: processor
140: input unit
150: storage

Claims (12)

collecting information models for assets in the factory;
generating a server by using the collected information models;
Including; by driving the created server to manage the assets in the factory;
assets are,
It is layered into at least one unit, at least one equipment constituting the unit, and at least one device constituting the equipment,
Units, equipment and devices,
Factory asset management method, characterized in that it is defined as the same type of information model regardless of hierarchy.
delete The method according to claim 1,
The device is
Factory asset management method, characterized in that it includes at least one value in which the control attribute of the device or the acquired value of the device is recorded.
4. The method according to claim 3,
The information model is
Factory asset management method, characterized in that it includes a management model in which the management information of the asset is recorded.
5. The method according to claim 4,
The management model is
Includes fixed and variable values,
The change value is
A method for managing a factory asset, characterized in that it is updated and received from an operating system.
6. The method of claim 5,
The fixed value is
Including a value for at least one of the name of the asset, the unique number, and the manufacturer,
The change value is
A factory asset management method, comprising a value for at least one of usage time and status.
7. The method of claim 6,
Assets are modeled in AML,
The model values are implemented in the form of OPC UA Node information,
The creation stage is
Factory asset management method, characterized in that the server is created by AML-to-OPC UA conversion.
The method according to claim 1,
management steps,
A method for managing factory assets, comprising managing interoperability between assets and interoperability between assets and an operating system.
The method according to claim 1,
at least one unit,
Factory asset management method, characterized in that the unit for performing a continuous process.
a communication unit that collects information models for assets in the factory;
A processor that configures a server using the information models collected through the communication unit, and drives the configured server to manage assets in the factory;
assets are,
It is layered into at least one unit, at least one equipment constituting the unit, and at least one device constituting the equipment,
Units, equipment and devices,
Factory asset management system, characterized in that it is defined as the same type of information model regardless of hierarchy.
collecting information models for assets in the factory;
Including; using the collected information models to manage the assets in the factory;
assets are,
It is layered into at least one unit, at least one equipment constituting the unit, and at least one device constituting the equipment,
Units, equipment and devices,
Factory asset management method, characterized in that it is defined as the same type of information model regardless of hierarchy.
a communication unit that collects information models for assets in the factory; and
A processor that manages assets in the factory using the collected information models;
assets are,
It is layered into at least one unit, at least one equipment constituting the unit, and at least one device constituting the equipment,
Units, equipment and devices,
Factory asset management system, characterized in that it is defined as the same type of information model regardless of the hierarchy.

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