CN103399545A - Real-time library management module used for distributed control system - Google Patents
Real-time library management module used for distributed control system Download PDFInfo
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Abstract
The invention discloses a real-time library management module used for a distributed control system. The real-time library management module is the core module of the distributed control system, is used for storing real-time data gathered or collected by the control system, and is used for providing a data source for a communication module and a logic calculation module; store units of three data types, i.e. an IO (input/output) data type storage unit, an IED (intelligent electronic device) data type storage unit and an imaginary point data type storage unit, are designed by the real-time library management module; the adaptability and the transportability of the real-time library management module are enhanced; and for realizing data information sharing among different control systems, a parallel node data storage unit is established by the real-time library management module to manage the quality bit and the data bit of a network variable. According to the real-time library management module used for the distributed control system, which is disclosed by the invention, a real-time data source can be provided for information sharing and data exchange among control systems, and meanwhile, comprehensive data support is provided for the production operation of an automatic system.
Description
Technical field
The application belongs to the distributed control technology field, relates generally to the robotization of the industries such as big power station, oil, chemical industry, metallurgy, track traffic; Real-time database management module in the application is the nucleus module of dcs, for storage control system collection or the real time data collected, and provides data source for modules such as communication, logical calculated.
Background technology
The establishment in the real-time storehouse of dcs at present generally is described point according to physical significance, is divided into the types such as digital quantity input, analog input, digital output, analog output.Due to the dcs complex technical process, take the control procedure of generating plant as example, generally be divided into three basic control systems: electrical system, master control system, auxiliary control system.Wherein master control system all adopts the DCS system platform to complete control task, backup system adopts PLC to control more, no matter electrical equipment is from device characteristics, control task, or system architecture all has essential distinction with heat power equipment, and generating plant generally is equipped with special-purpose electrical system (NCS system) and completes the electrical equipment control task.The data length that collecting device in each control system and equipment collect and type, all make a big difference, and to generating plant, realizes that full factory data information sharing brought certain difficulty.Along with the development of computer technology, the management function of dcs need to realize intellectuality, digitizing, long-range.For realizing above-mentioned target, dcs must rely on the real-time database management module of comprehensive various data types, on system structure and function, gives strong support.
Comprehensive foregoing, the present invention proposes a kind of real-time database management module for dcs.This real-time database management module integrates various image data, intermediate data, network data, becomes the nucleus module of dcs.
Summary of the invention
For solving the above problem that exists in prior art, the invention discloses a kind of real-time database management module for dcs, this module integrates IO data type storage unit, IED data type storage unit, imaginary point data type storage unit and parallel node data storage unit, for whole control system provides the real time data source.
The following design proposal of the concrete employing of the present invention:
A kind of real-time database management module for dcs, described real-time database management module is the nucleus module of dcs, for communication, logical calculated module provide the real time data source, it is characterized in that:
Different image data and/or process signal that described real-time database management module gathers as required and stores, be provided with respectively the storage unit of different types of data in real-time database management module.
The described storage unit that is provided with three kinds of data types for the real-time database management module of dcs: IO data type storage unit, IED data type storage unit, imaginary point data type storage unit;
Wherein, the data that IO data type storage unit can be stored mostly are 64 bytes most, IO data type storage unit connects common IO analog input card by the DP bus, for storing the data that common IO board collects, so-called common IO board refers to that the data length that board gathers fixes, and less than 64 bytes; Data in IO data type storage unit, by on Ethernet onet agreement, giving monitoring backstage HMI, to the parallel nodes control system, the IO driving interface that externally provides by the logical calculated module passes to the logical calculated module, participates in logical operation by Ethernet cnet protocol transmission;
The data that IED data type storage unit can be stored are greater than 64 bytes, and IED data type storage unit is passed through the collecting device of DP bus connection data section length greater than 64 bytes, or by the unfixed intelligent communication device of Ethernet connection data length; IED data type storage unit is described data according to physical significance, according to the IED template, adjust flexibly number of data points and length, the IED template is for describing the data message of smart machine, data are divided into to digital quantity input, analog input, digital output, analog output type, and define flexibly counting and data length of all types of data; Data in IED data type storage unit, by on Ethernet onet agreement, giving monitoring backstage HMI, to the parallel nodes control system, the IED driving interface that externally provides by the logical calculated module passes to the logical calculated module, participates in logical operation by Ethernet cnet protocol transmission;
Imaginary point data type storage unit is not corresponding with the collecting device of reality, only for the intermediate value of stored logic computing, can be according to actual needs, create the imaginary point of different types of data, comprise that Boolean type, two bytes have symbol integer, two byte unsigned ints, nybble that symbol integer, nybble unsigned int, nybble floating type are arranged.The imaginary point data can be divided into power down by attribute and keep imaginary point data and non-power-failure to keep two kinds of imaginary point data; After wherein power down kept the imaginary point data to refer to the control system shutdown, the imaginary point data can be kept at control system inside, and while starting shooting, can be transferred out and continue to use next time; After non-power-failure kept the imaginary point data to refer to the control system shutdown, the imaginary point data can not be preserved, and next time, while starting shooting, the imaginary point data were cleared; Imaginary point data in imaginary point data type storage unit, by on Ethernet onet agreement, giving monitoring backstage HMI, by Ethernet cnet protocol transmission, to the parallel nodes control system, by the mode of shared drive, participate in the result of logical operation stored logic computing.The present invention also further comprises following preferred design.
Described real-time database management module for dcs has been set up the parallel nodes data storage cell, has realized the data information sharing between different control system, and quality position and the data bit of network variable are carried out to storage administration.Wherein parallel nodes refers to, in large-scale or ultra-large type control system, moves identical monitoring software, two or more dcs websites that responsibility is identical.Between each parallel nodes control system, need to transmit real time data, i.e. network variable, to realize data information sharing.Each control system, choose a little according to actual needs, and determining in the real-time database management module of local control system needs the data point of sharing with the parallel nodes control system, by Ethernet cnet protocol transmission to the parallel nodes control system; Simultaneously, by Ethernet cnet agreement, receive the parallel nodes control system and be transferred to the parallel nodes data of local control system, and leave in the parallel nodes data storage cell.Data in the parallel nodes data storage cell are by on Ethernet onet agreement, giving monitoring backstage HMI, and the read data driving interface that externally provides by the logical calculated module passes to the logical calculated module, participates in logical operation.
Described real-time database management module for dcs adopts the hierarchical data structure to design.So-called hierarchical data structure, also be tree, refer to the use tree the mode presentation-entity and between contact.Between IO data type storage unit in this real-time database management module, IED data type storage unit, imaginary point data type storage unit, parallel nodes data storage cell and between each storage unit inside, pass through pointer association, close relation, memory usage is high.This real-time database management module adopts the mode of three-point fix, namely by control module address, collecting device address, acquisition channel period, can determine unique data point, have the characteristics such as location is convenient, access is efficient, can realize on-the-spot image data and the quick transmission between database management module in real time.
Described real-time database management module for dcs provides access for modules such as the communication of dcs, logical operations and has operated the api interface of real-time database management module.When common IO board collects data, by writing the interface function of IO data, the IO data can be write to IO data type storage unit; When intelligent communication device collects data, by writing the interface function of IED data, the IED data can be write to IED data type storage unit; After logical operation is finished, by writing the interface function of imaginary point, the intermediate value of logical operation can be write to imaginary point data type storage unit; When the off line parallel nodes data to the parallel nodes control system of this control system, by writing the interface function of parallel nodes data, the parallel nodes data can be write to the parallel nodes data storage cell.Simultaneously, can pass through the interface function of corresponding reading out data, obtain respectively the data of IO data type, IED data type, imaginary point data type and parallel nodes, by Ethernet onet stipulations, be transferred to monitoring backstage HMI.For preventing that the same data area is carried out to read-write operation simultaneously, the mutual exclusion protection when the inner employing of this real-time database management module semaphore is realized data are read and write; Read or while writing a certain data area, do not allow this zone is write or read operation simultaneously.
Beneficial effect of the present invention is as follows:
A kind of real-time database management module for dcs, integrate IO data type storage unit, IED data type storage unit, imaginary point data type storage unit and parallel node data storage unit, for information sharing and exchanges data between each control system provide the real time data source, for automated system realizes intellectuality, digitizing, long-range, on system structure and function, give strong support simultaneously.
The accompanying drawing explanation
Fig. 1 is real-time database management module network connection layout;
Fig. 2 is real-time database management module structural drawing;
Fig. 3 is real-time database management module data flow diagram.
Embodiment
Below in conjunction with the explanation accompanying drawing, design proposal of the present invention is described in further detail.
Be illustrated in figure 1 the real-time database management module network connection layout for dcs.Due to the dcs complex technical process, take the control procedure of generating plant as example, generally be divided into three basic control systems: electrical system, master control system, auxiliary control system.The data length that collecting device in each control system and equipment collect and type, all make a big difference, and to generating plant, realizes that full factory data information sharing brought certain difficulty.Described real-time database management module is summed up the common ground of collecting device and intelligent communication device, when definition data structure, three kinds of data types have been taken out, be respectively IO data type, IED data type, imaginary point data type, can adapt to the collection of various process signal and the access of intelligent communication device, for intellectuality, digitizing, the long-range of realizing dcs provides strong support.
Be illustrated in figure 2 the real-time database management module structural drawing for dcs.For the collection of adaptation various process signal and the access of intelligent communication device, common ground to collecting device and intelligent communication device is summed up, and has designed the storage unit of three kinds of data types: IO data type storage unit, IED data type storage unit, imaginary point data type storage unit.
Being characterized as of IO data type storage unit: the data that can store mostly are 64 bytes most.IO data type storage unit connects common IO analog input card, the data that collect be used to storing common IO board by the DP bus.So-called common IO board refers to, the data length that board gathers is fixed, and less than 64 bytes.During initialization, according to the maximum IO number of configuration, come the storage allocation space, support the hot plug of common IO analog input card.In IO data type storage unit, canned data comprises: imaginary point data and the real-time data collection of IO equipment, by on Ethernet onet agreement, giving monitoring backstage HMI, by Ethernet cnet protocol transmission to the parallel nodes control system, IO driving by logic inside passes to logic module, participates in logical operation.
Being characterized as of IED data type storage unit: the data that can store are greater than 64 bytes.IED data type storage unit is passed through the collecting device of DP bus connection data section length greater than 64 bytes, or by the unfixed intelligent communication device of Ethernet connection data length.IED data type storage unit is described data according to physical significance, and the corresponding IED template of each IED equipment, adjust number of data points and length flexibly according to the IED template.The IED template, for describing the data message of smart machine, is divided into the types such as digital quantity input, analog input, digital output, analog output.During initialization, according to the IED number of configuration, come the storage allocation space, do not support the hot plug of IED equipment.In IED data type storage unit, canned data comprises: the imaginary point data of IED equipment and real-time access data, by on Ethernet onet agreement, giving monitoring backstage HMI, by Ethernet cnet protocol transmission to the parallel nodes control system, IED driving by logic inside passes to logic module, participates in logical operation.
Being characterized as of imaginary point data type storage unit: not corresponding with the collecting device of reality, only for the intermediate value of stored logic computing.The data based real data type of imaginary point is described point, and is divided into power down and keeps imaginary point and non-power-failure to keep two kinds of imaginary points.The imaginary point that keeps of non-power-failure wherein, zero clearing after power down, data are not preserved; The imaginary point data that power down keeps are kept in nvram, and power down is not volatile, and after re-powering, data revert to the value before power down.Data in imaginary point data type storage unit, by on Ethernet onet agreement, giving monitoring backstage HMI, to the parallel nodes control system, participate in the result of logical operation stored logic computing by Ethernet cnet protocol transmission by the mode of sharing the M district.
In addition, described real-time database management module for dcs has been set up the parallel nodes data storage cell, has realized the data information sharing between different control system, and quality position and the data bit of network variable are carried out to storage administration.During initialization, according to the parallel nodes number of configuration, come the storage allocation space, do not support the dynamic link of parallel nodes and deletion.Each control system, choose a little according to actual needs, determines the upper dot data of this control system, by Ethernet cnet protocol transmission to the parallel nodes control system; Simultaneously, by the off line parallel nodes control system of Ethernet cnet agreement, be transferred to the parallel nodes data of this control system, and leave in the parallel nodes data storage cell.Data in the parallel nodes data storage cell are by giving monitoring backstage HMI on Ethernet onet agreement, the driving by logic inside passes to logic module, participates in logical operation.
Described real-time database management module for dcs adopts the hierarchical data structure to design, between IO data type storage unit wherein, IED data type storage unit, imaginary point data type storage unit, parallel nodes data storage cell and between each storage unit inside, pass through pointer association, close relation, memory usage is high.
Be illustrated in figure 3 the real-time database management module data flow diagram for dcs, relate to warehouse-in and the outbound of real time data.Data message in database management module adopts the mode of three-point fix in real time, namely by control module address, collecting device address, acquisition channel period, can locate unique data point.According to the period of different control module addresses, collecting device address and acquisition channel, determine the particular location of real time data in internal memory, realized easily accurate warehouse-in and the outbound of data.
The data loading scheme of described real-time database management module for dcs is:
By DP-NET bus at a high speed, obtain the IO categorical data information of on-the-spot common collecting device; IED data type information by other smart machines of the stipulations such as Modbus, CSC2000 conversion access; The data of imaginary point type, by the mode of shared drive, participate in logical operation, realizes the read-write of logic task to the imaginary point data; The data message of parallel nodes, obtain by exclusive control network C NET, realizes information sharing and exchanges data between each control system.It is synchronous that all data messages carry out redundancy by proprietary synchronizing network, and standby control module receives the synchrodata of primary control module, guarantees the consistance of main-slave control cell real time data.
The data outbound scheme of described real-time database management module for dcs is:
By self-defining ONET stipulations, on timing cycle, send real time data to arrive monitoring backstage HMI, on the real time data sent comprise attribute information, IO categorical data information, IED categorical data information, imaginary point data message and the parallel nodes data message of control module; By modes such as logical drive, shared drives, realize the data interaction between real-time database management module and logical operation module, wherein IO categorical data and IED categorical data are by the mode that drives, read-write is in the logic associated internal memory, the imaginary point categorical data, by shared drive, realize the read-write of logical operation to this partial data.
In figure, describe real-time database management module and the reciprocal process of monitoring backstage HMI and Logical Configuration system MP in detail.Take the IO categorical data as example, the IO categorical data is divided into analog input data (AI), digital quantity input data (DI), analog output data (AO), digital output data (DO).The data of all IO types, in mutual with monitoring backstage HMI, are not distinguished the input and output type, all use on the ONET protocol packing and send; When the data of IO type are that Logical Configuration system MP is mutual, distinguish two types of input and output, at first pass through driver, the input data of IO type in real-time database management module are read to the Input district of MP, then carry out logical operation, the intermediate value of computing is write to the imaginary point data field, and, by driver, the output type data in Output district in MP are written to the output type district of IO in real-time database management module.
Claims (8)
1. real-time database management module for dcs, described real-time database management module is the nucleus module of dcs, for communication, logical calculated module provide the real time data source, it is characterized in that:
Different image data and/or process signal that described real-time database management module gathers as required and stores, be provided with respectively the storage unit of different types of data in real-time database management module.
2. real-time database management module for dcs is characterized in that:
The described storage unit that is provided with three kinds of data types for the real-time database management module of dcs: IO data type storage unit, IED data type storage unit, imaginary point data type storage unit;
Wherein, the data that IO data type storage unit can be stored mostly are 64 bytes most, IO data type storage unit connects common IO analog input card by the DP bus, for storing the data that common IO board collects, so-called common IO board refers to that the data length that board gathers fixes, and less than 64 bytes; Data in IO data type storage unit, by on Ethernet onet agreement, giving monitoring backstage HMI, to the parallel nodes control system, the IO driving interface that externally provides by the logical calculated module passes to the logical calculated module, participates in logical operation by Ethernet cnet protocol transmission;
The data that IED data type storage unit can be stored are greater than 64 bytes, and IED data type storage unit is passed through the collecting device of DP bus connection data section length greater than 64 bytes, or by the unfixed intelligent communication device of Ethernet connection data length; IED data type storage unit is described data according to physical significance, according to the IED template, adjust flexibly number of data points and length, the IED template is for describing the data message of smart machine, data are divided into to digital quantity input, analog input, digital output, analog output type, and define flexibly counting and data length of all types of data; Data in IED data type storage unit, by on Ethernet onet agreement, giving monitoring backstage HMI, to the parallel nodes control system, the IED driving interface that externally provides by the logical calculated module passes to the logical calculated module, participates in logical operation by Ethernet cnet protocol transmission.
Imaginary point data type storage unit is not corresponding with the collecting device of reality, only for the intermediate value of stored logic computing, can be according to actual needs, create the imaginary point of different types of data, comprise that Boolean type, two bytes have symbol integer, two byte unsigned ints, nybble that symbol integer, nybble unsigned int, nybble floating type are arranged.The imaginary point data can be divided into power down by attribute and keep imaginary point data and non-power-failure to keep two kinds of imaginary point data; After wherein power down kept the imaginary point data to refer to the control system shutdown, the imaginary point data can be kept at control system inside, and while starting shooting, can be transferred out and continue to use next time; After non-power-failure kept the imaginary point data to refer to the control system shutdown, the imaginary point data can not be preserved, and next time, while starting shooting, the imaginary point data were cleared; Imaginary point data in imaginary point data type storage unit, by on Ethernet onet agreement, giving monitoring backstage HMI, by Ethernet cnet protocol transmission, to the parallel nodes control system, by the mode of shared drive, participate in the result of logical operation stored logic computing.
3. the real-time database management module for dcs according to claim 2 is characterized in that:
described real-time database management module for dcs also further comprises the parallel nodes data storage cell, to realize the data information sharing between local control system and parallel nodes control system, described parallel nodes data storage cell carries out storage administration to the parallel nodes data, quality position and the data bit of described parallel nodes packet includes network variable, local control system will need the data transmission shared with the parallel nodes control system to the parallel nodes control system by Ethernet cnet agreement in the real-time database management module in this locality, and receive by Ethernet cnet agreement the parallel nodes data that the parallel nodes control system is transferred to local control system, and leave in the parallel nodes data storage cell, local control system is also monitored backstage HMI by the data in the parallel nodes data storage cell by on Ethernet onet agreement, giving, the read data driving interface that externally provides by the logical calculated module passes to the logical calculated module, participate in logical operation.
4. the real-time database management module for dcs according to claim 2 is characterized in that:
Described real-time database management module for dcs adopts the hierarchical data structure to design, and between the IO data type storage unit in this real-time database management module, IED data type storage unit, imaginary point data type storage unit, parallel nodes data storage cell and between each storage unit inside, passes through pointer association.
5. the real-time database management module for dcs according to claim 2 is characterized in that:
This real-time database management module adopts the mode of three-point fix, namely by control module address, collecting device address, acquisition channel period, determines unique data point, can realize on-the-spot image data and the quick transmission between database management module in real time.
6. the real-time database management module for dcs according to claim 2 is characterized in that:
The modules such as the described communication, logical calculated that promising dcs also is set for the real-time database management module of dcs provide access and have operated the api interface of real-time database management module.
7. the real-time database management module for dcs according to claim 6 is characterized in that:
When common IO analog input card collects data, by writing the interface function of IO data, the IO data are write to IO data type storage unit; When intelligent communication device collects data, by writing the interface function of IED data, the IED data are write to IED data type storage unit; After logical operation is finished, by writing the interface function of imaginary point, the intermediate value of logical operation is write to imaginary point data type storage unit; When local control system receives the parallel nodes data of parallel nodes control system, by writing the interface function of parallel nodes data, the parallel nodes data are write to the parallel nodes data storage cell; By the interface function of corresponding reading out data, obtain respectively the data of IO data type, IED data type, imaginary point data type and parallel nodes, by Ethernet onet stipulations, be transferred to monitoring backstage HMI.
8. according to claim 2 or 7 described real-time database management module for dcs, it is characterized in that: for preventing that the same data area is carried out to read-write operation simultaneously, the mutual exclusion protection when the inner employing of this real-time database management module semaphore is realized data are read and write; Read or while writing a certain data area, do not allow this zone is write or read operation simultaneously.
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| CN113742393B (en) * | 2021-06-22 | 2024-02-27 | 云南昆钢电子信息科技有限公司 | Time sequence data processing system suitable for Internet application |
| CN117950599A (en) * | 2024-03-27 | 2024-04-30 | 国家超级计算天津中心 | I/O stack construction method, device, equipment and medium based on distributed system |
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Inventor after: Bai Xueling Inventor after: Yang Yonglin Inventor after: Wang Xiaofeng Inventor after: Xi Zhijiang Inventor after: Liu Yongjun Inventor before: Bai Xueling Inventor before: Yang Yonglin Inventor before: Wang Xiaofeng Inventor before: Xi Zhijiang |
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Effective date of registration: 20151224 Address after: 100085 Beijing city on the base of the information industry on the street, No. four, No. 9, Haidian District Patentee after: BEIJING SIFANG AUTOMATION Co.,Ltd. Patentee after: China South Power Grid International Co.,Ltd. Address before: 100085 Beijing city on the base of the information industry on the street, No. four, No. 9, Haidian District Patentee before: BEIJING SIFANG AUTOMATION Co.,Ltd. |