KR20150052538A - Apparatus and method for managing node of opc ua - Google Patents
Apparatus and method for managing node of opc ua Download PDFInfo
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- KR20150052538A KR20150052538A KR1020130134050A KR20130134050A KR20150052538A KR 20150052538 A KR20150052538 A KR 20150052538A KR 1020130134050 A KR1020130134050 A KR 1020130134050A KR 20130134050 A KR20130134050 A KR 20130134050A KR 20150052538 A KR20150052538 A KR 20150052538A
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
Description
The present invention relates to an OPC UA node management apparatus and method thereof, and more particularly, to an OPC UA node management apparatus and method for managing an OPC UA node in which an OPC UA node is managed by loading an object node Relates to an OPC UA node management apparatus and a method thereof.
OPC-UA was newly established in December 2011 as IEC62541 standard, replacing the existing IEC61970-4XX series CIS (Component Interface Specification) specification for IEC61970 Common Information Model (CIM) communication service. IEC61970 CIM is widely applied to EMS (Energy Management System) and DMS (Distribution Management System) as a core standard of Smart Grid globally, and OPC UA standard is replaced with existing CIS standard for new smart grid application development. In the future, OPC UA will be applied as the communication service standard of all IEC61970 CIM-based applications.
OPC UA, which is applied to the communication service standard of Smart Grid application, provides server / client communication service of OPC UA server and OPC UA client. OPC UA provides a discovery service set for management of service registration, a SecureChannel Service Set for server and client transmission, a secure channel processing for received message, A Session Service Set for processing the session connection between the server and the authenticated client, a NodeManagement Service Set for processing the node information request, a View Service Set for processing the view request of the address space subset and the address space configuration, An attribute service set for attribute information request processing for nodes, a method service set for processing method requests in the address space, periodic monitoring of changes in client data and event occurrence, and detection of change history MonitoredItem Service Se to deliver the results to the server t, a subscription service set to receive the details of data change and event occurrence, and so on.
Here, the OPC UA communicates with the client in response to a request, and the unit of data to be transmitted is a node. In the OPC UA communication service, the OPCUA server constructs an address space in the memory to process requests such as client node creation / deletion / inquiry (read / write), and provides all nodes in the memory. To do so, it is necessary to load all the nodes in the address space of the memory when the service is started. When the service is operated, the request nodes are found in the address space in the memory to respond to the services of the clients. Therefore, since the conventional OPC-UA processes nodes such as data objects, variables (data variable, property variable), types (object type, variable type, reference type) And these nodes must also be managed and processed in the address space on the memory for communication services. In the conventional OPC UA node management and service, a communication service can be performed at a level where the size of a node processed in one application such as SCADA and DMS Application can be managed and processed in an address space range processed in memory. However, In particular, in an integrated platform environment for exchanging information between two or more applications, the number of nodes to be managed and processed increases to the level of big data. Therefore, It takes a lot of time to load, and when the range of the limited address space is exceeded, the service operation due to the memory overflow becomes impossible.
Korean Patent Publication No. 2011-0054370 discloses "OPC UA server for device integration based on FDT / DTM and EDDL ".
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an OPC UA server, which loads only object nodes of class concept and type nodes defining data types of respective nodes, Wherein the variable node is stored in a separate database together with reference information which is a connection point with an object node, and a method thereof.
It is another object of the present invention to provide an OPC UA node management apparatus and method in which a variable node is loaded into a memory space only when there is a generation, deletion and inquiry request for an attribute value of the object node from an OPC UA client .
In addition, the node of the present invention includes an OPC UA node management apparatus that divides an object node of a class concept into a dynamic node including a static node including a type node defining a data type of each node and a variable node having an actual attribute value, The purpose of this method is to provide.
According to an aspect of the present invention, there is provided an apparatus for managing an OPC UA node, comprising: a communication unit for performing communication with an OPC for OPC (ULE) A service control unit for controlling service execution requested from the OPC UA client; And a memory unit for loading a node for performing a service requested by the OPC UA client, wherein the node is divided into a static node and a dynamic node, the static node is stored in the memory unit, And reference information between the dynamic node and the static node is stored in the database unit.
Also, the service requested from the OPC UA client is any one of an inquiry service including creation, deletion, reading and writing of the static node and a inquiry service including creation, deletion, reading and writing of the dynamic node .
The static node is a type node that defines an object node of a class concept and a data type of each node, and the dynamic node is a variable node having an actual attribute value.
In addition, the service control unit may request the OPC UA client to classify whether the service requested by the OPC UA client is a creation, deletion and inquiry service of the node for the static node, a creation, deletion, Processing module; A result storage module for storing an execution result of the service requested by the OPC UA client; And a result transmitting module for transmitting an execution result of the service requested by the OPC UA client to the OPC UA client.
The service control unit may further include a loading management module loading the dynamic node stored in the database unit into the memory unit when the OPC UA client requests creation, deletion, and query service of the node for the dynamic node. Deletes and inquires a node based on the static node stored in the memory unit according to a service requested by the OPC UA client, and generates, deletes, and queries a node based on the dynamic node loaded in the memory unit A node management module that performs a node management function; And a memory management module for deleting the dynamic node created and inquired in the memory unit according to a service requested by the OPC UA client.
According to another aspect of the present invention, there is provided a method of managing an OPC UA node comprising: constructing a memory unit for storing a static node to perform a service requested from an OPC UA client; Establishing a database unit for storing reference information between the dynamic node and the dynamic node and the static node to perform a service requested from the OPC UA client; Performing communication with the OPC Unified Architecture (UPC) client by a communication unit; And controlling the service execution requested by the OPC UA client by the service control unit.
The step of constructing the memory unit based on the static node to perform the service requested by the OPC UA client may include loading the static node into the memory unit, And generating a node of the memory unit.
In addition, the step of controlling service execution requested from the OPC UA client may include: classifying a service requested by the OPC UA client; And performing a service requested by the OPC UA client.
The classifying service requested from the OPC UA client may include generating and deleting a node for the dynamic node if the service requested by the OPC UA client is a creation, deletion and inquiry service of the node for the static node Service classification.
When the OPC UA client requests creation, deletion and query service of the node for the dynamic node, the dynamic node stored in the database unit is extracted from the OPC UA client Loading into the memory unit; Performing a creation, deletion, and lookup service of a node based on the dynamic node and the reference information loaded in the memory unit; And deleting the dynamic node created and inquired in the memory unit according to a service requested by the OPC UA client.
When the OPC UA client requests the creation, deletion and query service of the node for the static node, the OPC UA client performs a service requested from the OPC UA client, Deletion, and inquiry service of the server.
Storing an execution result of a service requested by the OPC UA client after performing a service requested from the OPC UA client; And transmitting an execution result of the service requested by the OPC UA client to the OPC UA client.
In the OPC UA node management apparatus and method according to the present invention, the OPC UA server constructs a memory space by loading only object nodes of class concept and type nodes defining data types of respective nodes, The variable node having the attribute value is stored in the separate database together with the reference information which is a connection point with the object node, so that the range of the address space can be maintained at an appropriate level.
In addition, the variable node is loaded into the memory space only when there is a request to create, delete, and query an attribute value of the object node from the OPC UA client, thereby reducing the time taken to load the large capacity node .
FIG. 1 is a diagram for explaining a configuration of an OPC UA node management apparatus according to an embodiment of the present invention.
2 is a diagram for explaining a detailed configuration of a service control unit employed in an OPC UA node management apparatus according to an embodiment of the present invention.
3 is a diagram illustrating a procedure of an OPC UA node management method according to an embodiment of the present invention.
4 is a diagram for explaining a procedure of an OPC UA node management method according to an embodiment of the present invention in detail.
5 is a diagram illustrating a method of building a memory unit in an OPC UA node management method according to an embodiment of the present invention.
6 is a diagram illustrating a method of loading a dynamic node into a memory unit in an OPC UA node management method according to an embodiment of the present invention.
7 is a diagram illustrating a method of performing a service for generating a node in an OPC UA node management method according to an embodiment of the present invention.
8 is a diagram for explaining a method of performing a service for deleting nodes in an OPC UA node management method according to an embodiment of the present invention.
9 is a diagram for explaining a method of performing a service for inquiring a node in an OPC UA node management method according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . First, in adding reference numerals to the constituent elements of the drawings, it is to be noted that the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
Hereinafter, an OPC UA node management apparatus and method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram for explaining a configuration of an OPC UA node management apparatus according to an embodiment of the present invention.
1, an OPC UA
The
The
The
2 is a diagram for explaining a detailed configuration of a service control unit employed in an OPC UA node management apparatus according to an embodiment of the present invention.
Referring to FIG. 2, the
To this end, the
The
The
The
The
The
The
3 is a diagram illustrating a procedure of an OPC UA node management method according to an embodiment of the present invention.
Referring to FIG. 3, the OPC UA node management method according to the present invention uses the OPC UA node management apparatus described above, and a duplicate description will be omitted.
First, the
Next, the
Next, communication with the OPC UA client is performed (S120).
Next, the service execution requested from the OPC UA client is controlled (S130).
4 is a diagram for explaining a procedure of an OPC UA node management method according to an embodiment of the present invention in detail.
4, in order to construct the
Next, the service requested by the OPC UA client is received (S220).
Next, the service requested by the OPC UA client is classified (S230). Step S230 classifies whether the service requested by the OPC UA client is creation, deletion and inquiry service of a node for a static node, creation, deletion and inquiry service of a node for a dynamic node.
Next, it is determined whether the requested service is a dynamic node creation and inquiry service (S240).
Next, if the requested service is a deletion and lookup service of a dynamic node, the dynamic node is loaded into the
Next, it is determined whether the requested service is a dynamic node creation, deletion, and creation, deletion, and inquiry service of a static node other than a query service (S260).
As a result of the determination in step S260, if the service is a creation, deletion, and inquiry service of a static node, a static node creation, deletion, and query service are performed and the service execution result is stored (S270).
As a result of the determination in step S260, if the service is not a creation, deletion, or inquiry service of a static node, the service execution result is transmitted (S280).
Next, it is determined whether the requested service is a dynamic node creation service and a dynamic node deletion service, not a query service (S280).
If it is determined in step S280 that the service is a dynamic node creation and inquiry service, the dynamic node created in the
FIG. 5 is a diagram for explaining a method of constructing a memory unit in an OPC UA node management method according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating an OPC UA node management method according to an embodiment of the present invention. Fig. 8 is a diagram for explaining a method of loading a dynamic node. Fig.
As shown in FIG. 5, a method of constructing a memory unit first loads an object type node (S300). Next, a Property Variable Type node is loaded (S310). Next, the data variable type node is loaded (S320). Next, a reference type node is loaded (S330). Next, an object node folder structure is constructed (S340). Next, the object node is loaded (S350). Next, reference information between nodes is inputted (S360).
As shown in FIG. 6, a method for loading a dynamic node first extracts a dynamic node for an object node (S400). Next, the extracted dynamic node is loaded into the memory unit 130 (S410). Next, a dynamic node is created in the memory unit 130 (S420). Finally, reference information between the static node and the dynamic node is input (S430).
7 is a diagram illustrating a method of performing a service for generating a node in an OPC UA node management method according to an embodiment of the present invention.
Referring to FIG. 7, first, a service request of a client is classified into node creation, deletion, and inquiry service. If the service is a node creation request service according to each classification, a corresponding node is created in the memory unit 130 (S500 ).
Next, the service execution result is stored (S510).
Next, the execution result is transmitted to the OPC UA client (S520).
Next, after the execution result is transmitted, it is determined whether the service is a generation service of a dynamic node (S530).
As a result of the determination in step S530, if the dynamic node creation service is requested, the generated dynamic node is deleted (S540).
8 is a diagram for explaining a method of performing a service for deleting nodes in an OPC UA node management method according to an embodiment of the present invention.
Referring to FIG. 8, first, a service request of a client is classified into a node creation, deletion, and inquiry service. If the service is a node deletion request service according to each classification, the node is deleted from the memory unit 130 (S600).
If the dynamic node deletion service is requested as a result of the determination, the dynamic node is loaded into the memory unit 130 (S610).
Next, a dynamic node is created in the memory unit 130 (S620).
If it is determined in step S600 that a service for deleting a static node is requested, the corresponding static node stored in the
Next, the static node deletion service execution result is stored (S640).
Next, the service execution result is transmitted to the OPC UA client (S650).
9 is a diagram for explaining a method of performing a service for inquiring a node in an OPC UA node management method according to an embodiment of the present invention.
Referring to FIG. 9, first, a service request of a client is classified into node creation, deletion, and inquiry service. In the case of a node inquiry service according to each classification, the node is stored in the
Next, if it is determined in step S700 that the inquiry service of the dynamic node is requested, the corresponding dynamic node is loaded into the memory unit 130 (step S710).
Next, a dynamic node is created in the memory unit 130 (S720).
Next, if the query service of the static node is requested as a result of the determination, the static node stored in the
Next, the inquiry of the node confirms whether or not it is a write inquiry service (S740).
Next, the result of performing the write query service is stored (S750).
Next, the processing result is transmitted to the OPC UA client (S760).
Next, it is determined whether the dynamic node is an inquiry service (S770).
If it is determined in operation S770 that the inquiry service of the dynamic node is requested, the corresponding dynamic node stored in the
As described above, in the OPC UA node management apparatus and method according to the present invention, the OPC UA server constructs a memory space by loading only object nodes of class concept and type nodes defining data types of respective nodes, The variable node is stored in a separate database together with reference information, which is a connection point with the object node, so that the range of the address space can be maintained at an appropriate level.
In addition, according to the present invention, a variable node is loaded into a memory space only when there is a generation, deletion, and inquiry request for an attribute value of the object node from an OPC UA client, thereby reducing the time taken to load a large capacity node.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art without departing from the scope of the appended claims. As will be understood by those skilled in the art.
100: OPC UA node management device
110: communication unit 120: service control unit
130: memory unit 140: database unit
Claims (12)
A service control unit for controlling service execution requested from the OPC UA client;
And a memory unit for loading a node for performing a service requested by the OPC UA client,
Wherein the node is divided into a static node and a dynamic node, the static node is stored in the memory unit, and the reference information between the dynamic node and the dynamic node and the static node is stored in a database unit. Management device.
Wherein the service requested by the OPC UA client is one of an inquiry service including creation, deletion, reading and writing of the static node, and an inquiry service including creation, deletion, reading and writing of the dynamic node OPC UA node management device.
Wherein the static node is a type node that defines an object node of a class concept and a data type of each node, and the dynamic node is a variable node having an actual attribute value.
The service control unit,
A request processing module for classifying whether the service requested by the OPC UA client is a creation, deletion, and inquiry service of the node for the static node, creation, deletion, and inquiry of the node for the dynamic node through the communication unit;
A result storage module for storing an execution result of the service requested by the OPC UA client; And
A result transmitting module for transmitting an execution result of the service requested by the OPC UA client to the OPC UA client;
And an OPC node managing unit for managing OPC nodes.
The service control unit,
A loading management module loading the dynamic node stored in the database unit into the memory unit when the OPC UA client requests creation, deletion and query service of the node for the dynamic node;
Deletes and inquires a node based on the static node stored in the memory unit according to a service requested by the OPC UA client, and generates, deletes, and queries a node based on the dynamic node loaded in the memory unit A node management module that performs a node management function; And
A memory management module for deleting the dynamic node created and inquired in the memory unit according to a service requested by the OPC UA client;
And an OPC node managing unit for managing OPC nodes.
Establishing a database unit for storing reference information between the dynamic node and the dynamic node and the static node to perform a service requested from the OPC UA client;
Performing communication with the OPC Unified Architecture (UPC) client by a communication unit; And
Controlling the service execution requested by the OPC UA client by the service control unit;
The method comprising the steps of:
Wherein the step of constructing the memory unit based on the static node to perform the service requested by the OPC UA client comprises:
Loading a static node into the memory unit; And
Generating a node of the memory unit;
The method comprising the steps of:
Wherein controlling the service execution requested by the OPC UA client comprises:
Classifying a service requested by the OPC UA client; And
Performing a service requested by the OPC UA client;
The method comprising the steps of:
Wherein the classifying the service requested by the OPC UA client comprises:
Wherein the OPC UA node classifies whether the service requested by the OPC UA client is a creation, deletion and inquiry service of the node for the static node, a creation, deletion and inquiry service of the node for the dynamic node.
In the step of performing a service requested from the OPC UA client,
Extracting and loading the dynamic node stored in the database unit into the memory unit when the OPC UA client requests creation, deletion and query service of the node for the dynamic node;
Performing a creation, deletion, and lookup service of a node based on the dynamic node and the reference information loaded in the memory unit; And
Deleting the dynamic node created and inquired in the memory unit according to a service requested by the OPC UA client;
The method comprising the steps of:
In the step of performing a service requested from the OPC UA client,
Deletion, and lookup service based on the static node stored in the memory unit when the OPC UA client requests the generation, deletion, and inquiry service of the node for the static node. How to manage nodes.
After performing the service requested from the OPC UA client,
Storing an execution result of the service requested by the OPC UA client; And
Transmitting an execution result of the service requested by the OPC UA client to the OPC UA client;
The method comprising the steps of:
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018194222A1 (en) * | 2017-04-18 | 2018-10-25 | 엘에스산전 주식회사 | Cim- and opc-ua-based data interoperable method |
| CN108873847A (en) * | 2018-07-13 | 2018-11-23 | 北京工业大学 | A kind of collecting method towards die forging production line |
| KR101978469B1 (en) | 2018-11-23 | 2019-05-14 | (주) 유비씨 | Cyber physical production system and method using centeric opc-ua server |
| KR102063024B1 (en) * | 2018-08-30 | 2020-01-07 | 한국전력공사 | System for integrated process of data for smart city and method thereof |
| EP3851928A1 (en) * | 2020-01-17 | 2021-07-21 | Siemens Aktiengesellschaft | A system for data transmission between a client device, a server device and a plurality of automation devices |
| CN113196192A (en) * | 2018-12-28 | 2021-07-30 | 西门子股份公司 | Gateway and method for converting a description of industrial process equipment into a data information model |
| WO2022011579A1 (en) * | 2020-07-15 | 2022-01-20 | 海天塑机集团有限公司 | Injection molding machine control method and system based on edge computing |
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| WO2018194222A1 (en) * | 2017-04-18 | 2018-10-25 | 엘에스산전 주식회사 | Cim- and opc-ua-based data interoperable method |
| CN108873847A (en) * | 2018-07-13 | 2018-11-23 | 北京工业大学 | A kind of collecting method towards die forging production line |
| KR102063024B1 (en) * | 2018-08-30 | 2020-01-07 | 한국전력공사 | System for integrated process of data for smart city and method thereof |
| KR101978469B1 (en) | 2018-11-23 | 2019-05-14 | (주) 유비씨 | Cyber physical production system and method using centeric opc-ua server |
| CN113196192A (en) * | 2018-12-28 | 2021-07-30 | 西门子股份公司 | Gateway and method for converting a description of industrial process equipment into a data information model |
| EP3851928A1 (en) * | 2020-01-17 | 2021-07-21 | Siemens Aktiengesellschaft | A system for data transmission between a client device, a server device and a plurality of automation devices |
| WO2021144086A1 (en) * | 2020-01-17 | 2021-07-22 | Siemens Aktiengesellschaft | A system for data transmission between a client device, a server device and a plurality of automation devices |
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