CN203773317U - Distributed control system - Google Patents

Distributed control system Download PDF

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Publication number
CN203773317U
CN203773317U CN201420100423.6U CN201420100423U CN203773317U CN 203773317 U CN203773317 U CN 203773317U CN 201420100423 U CN201420100423 U CN 201420100423U CN 203773317 U CN203773317 U CN 203773317U
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China
Prior art keywords
plc
subsystem
master station
control
dcs
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Active
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CN201420100423.6U
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Chinese (zh)
Inventor
童小川
周孝艺
刘聪
李向辉
祁新杰
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SHANGHAI HENGTUO INDUSTRY DEVELOPMENT CO., LTD.
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704th Research Institute of CSIC
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Priority to CN201420100423.6U priority Critical patent/CN203773317U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The utility model relates to a distributed control system. The distributed control system comprises a plurality of subsystem control cabinets and a main console, and is characterized in that subsystem PLCs and a main console PLC are connected through a ProfiBus_DP bus and electrically connected through shielded signal cables, and the two ends of the shielded signal cables are connected with input and output points of the subsystem PLCs and the main console PLC. A communication network where the ProfiBus_DP bus and the shield signal cables are combined is adopted by the distributed control system provided by the utility model to guarantee convenience, accuracy and reliability of information transmission of the system, and the antijamming capability of the control system is raised, so the distributed control system provided by the utility model has great economic benefits.

Description

A kind of Distributed Control System (DCS)
Technical field
The utility model relates to a kind of control system, relates in particular to a kind of control system that is applicable to many subsystems.
Background technology
At existing industrial control field, for the coordination of this plurality of devices, control, there is use DCS (dcs) to complete the scheme of controlling function.But DCS is more partial to flow process to be controlled, and architecture is comparatively complicated, except containing equipment control, and the aspects such as more menu present factory monitoring and management, enterprise operation and management.Its complicated framework is more used in the process industries such as chemical industry, electric power, papermaking it, and is not suitable for the control flow of discrete operations.Also have the PLC(Programmable Logic Controller using based on Profibus bus) control network and complete the case of controlling function.But this scheme is not considered complicated electromagnetic environment, do not relate to the functions such as control management yet.In addition, when communication network breaks down, the communication of each control desk (station) will be ended, and the reliability level of whole system is lower.
Summary of the invention
Goal of the invention of the present utility model is under complex electromagnetic environment, by Distributed Control System (DCS), completes the control to each subsystem.By adopting dual redundant communication to guarantee the accurate transmission of each ready signal relevant to each subsystem operating process, thereby improve the functional reliability of Distributed Control System (DCS), ensure the operation of whole system safety and steady.
The technical solution of the utility model is a kind of Distributed Control System (DCS), comprises a plurality of subsystem switch boards and master station, it is characterized in that,
Described master station comprises master station industrial computer and the master station PLC being electrically connected to master station industrial computer,
Described subsystem switch board comprises subsystem PLC, panel leds, Display panel screen, panel control knob and control loop, described panel leds, Display panel screen, panel control knob and control loop are electrically connected to subsystem PLC respectively, described control loop is controlled controlled device action under subsystem PLC instruction, the described subsystem PLC of output terminal access of sensor
Described each subsystem PLC is connected by PROFIBUS_DP bus with master station PLC, between each subsystem PLC and master station PLC, be electrically connected to respectively by signal shielding cable, described signal shielding cable two ends are connected on the input and output point of subsystem PLC and master station PLC.
Further, described described each subsystem PLC and the signal shielding cable between master station PLC transmit subsystem ready signal for subsystem PLC to master station PLC.
Further, described sensor is temperature sensor, pressure transducer, flow sensor or level sensor, and described controlled device is electromagnetic valve coil, electric control valve, waterflood pump motor, unwatering pump motor and electric heater.
Further, described subsystem PLC and master station PLC adopt Siemens SIMATICS7-200, and subsystem PLC and master station PLC are by EM277 expansion module access PROFIBUS_DP bus.
The beneficial effects of the utility model are that the communication network that Distributed Control System (DCS) of the present utility model adopts PROFIBUS_DP bus and signal shielding cable to combine carrys out the convenient, accurate, reliable of safeguards system communication, improved the antijamming capability of control system, by the test of 1,000 left and right, control system working stability, shows that this control system has higher reliability; The subsystem being distributed in everywhere acts accordingly in collection external data, has the ability from main control, also can carry out centralized control by master station, and control and management power can be carried out flexibly, be distributed easily between master station and subsystem.Therefore, there is very large economic benefit.
Accompanying drawing explanation
Fig. 1 the utility model control system block diagram
The subsystem switch board schematic diagram of Fig. 2 the utility model control system
Fig. 3 the utility model control system communication network architecture figure
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, the utility model is a kind of Distributed Control System (DCS), comprises each subsystem switch board and master station.
Described master station comprises master station industrial computer and the master station PLC being electrically connected to master station industrial computer.
As shown in Figure 2, described subsystem switch board comprises subsystem PLC, panel leds, Display panel screen, panel control knob and control loop, described panel leds, Display panel screen, panel control knob and control loop are electrically connected to subsystem PLC respectively, described control loop is controlled controlled device action under subsystem PLC instruction, the described subsystem PLC of output terminal access of sensor.Described subsystem PLC and master station PLC adopt Siemens SIMATIC S7-200, and subsystem PLC and master station PLC are by EM277 expansion module access PROFIBUS_DP bus.Described sensor is temperature sensor, pressure transducer, flow sensor or level sensor, and described controlled device is electromagnetic valve coil, electric control valve, waterflood pump motor, unwatering pump motor and electric heater.
As shown in Figure 3, described each subsystem PLC is connected by PROFIBUS_DP bus with master station PLC, between each subsystem PLC and master station PLC, be electrically connected to respectively by signal shielding cable, described signal shielding cable two ends are connected on the input and output point of subsystem PLC and master station PLC.
Between master station and each subsystem switch board, adopt the transmission of all data between PROFIBUS_DP bus completion system, to the ready signal in system, adopt in addition independent signal shielding cable to transmit.Described described each subsystem PLC and the signal shielding cable between master station PLC transmit subsystem ready signal for subsystem PLC to master station PLC.Described master station completes the operating process of controlled system and controls, enter after standby condition, master station is waited for each subsystem ready for sending signal, only have when these signals all possess, could complete last operation by master station, master station is retracted to master station by the control of each subsystem, realizes the centralized control to each subsystem.
Master station completes whole operating process and controls, enter after standby condition, master station is waited for each subsystem ready for sending signal, only have when these signals all possess, could complete last motion action by master station, master station is retracted to master station by the control of each subsystem, the centralized control of realization to each subsystem, specific works flow process is: master station sends application control signal to each subsystem switch board, after each subsystem switch board is received this signal, transmission is returned control signal to master station, so far master station carries out each subsystem to control, master station can be directly switch into control each subsystem switch board after completing control task, each subsystem switch board is local control model under default situations.
This Distributed Control System (DCS) is in the process of operation, and each subsystem switch board has gathered a large amount of physical datas, such as hydrodynamic pressure, and temperature, flow etc.Master station, as by the central control station of control system, must be collected the major parameter of each subsystem, and whole by the operation conditions of control system according to the monitoring in real time of these parameters, and potential fault is made early warning or sent warning message.The distributing position of each subsystem comparatively disperses and is distant, if all adopt the mode of signal cable transmission, and the quantity of cable in increase system greatly, and also the extendability of whole system also can reduce greatly.Therefore master station and each subsystem switch board complete information interaction by PROFIBUS_DP bus.Except by PROFIBUS_DP bus transfer data, in order to improve the reliability of Distributed Control System (DCS) work, the key parameter in system is connected by signal shielding cable again, by the design of this dissimilar redundancy, improve the reliability of signal transmission.Signal by bus transfer is to transmit in the mode of digital signal, signal by shielded cable is to transmit in the mode of simulating signal, the transmission mode of this dual redundant has improved the accuracy of signal transmission on the one hand, improve the ability of the anti-complex electromagnetic environment of equipment on the one hand, thereby promoted the reliability level of whole Distributed Control System (DCS).In actual use, the key signal for transmission, can pass through the Inspection of two kinds of signals, guarantees the accurate of signal transmission.In bus network, break down in emergency circumstances, guarantee carrying out smoothly of the whole operating process of controlled system.

Claims (4)

1. a Distributed Control System (DCS), comprises a plurality of subsystem switch boards and master station, it is characterized in that,
Described master station comprises master station industrial computer and the master station PLC being electrically connected to master station industrial computer,
Described subsystem switch board comprises subsystem PLC, panel leds, Display panel screen, panel control knob and control loop, described panel leds, Display panel screen, panel control knob and control loop are electrically connected to subsystem PLC respectively, described control loop is controlled controlled device action under subsystem PLC instruction, the described subsystem PLC of output terminal access of sensor
Described each subsystem PLC is connected by PROFIBUS_DP bus with master station PLC, between each subsystem PLC and master station PLC, be electrically connected to respectively by signal shielding cable, described signal shielding cable two ends are connected on the input and output point of subsystem PLC and master station PLC.
2. a kind of Distributed Control System (DCS) as claimed in claim 1, is characterized in that, described described each subsystem PLC and the signal shielding cable between master station PLC transmit subsystem ready signal for subsystem PLC to master station PLC.
3. a kind of Distributed Control System (DCS) as claimed in claim 2, it is characterized in that, described sensor is temperature sensor, pressure transducer, flow sensor or level sensor, and described controlled device is electromagnetic valve coil, electric control valve, waterflood pump motor, unwatering pump motor and electric heater.
4. a kind of Distributed Control System (DCS) as described in as arbitrary in claim 1-3 one, it is characterized in that, described subsystem PLC and master station PLC adopt Siemens SIMATIC S7-200, and subsystem PLC and master station PLC are by EM277 expansion module access PROFIBUS_DP bus.
CN201420100423.6U 2014-03-06 2014-03-06 Distributed control system Active CN203773317U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104898586A (en) * 2014-09-15 2015-09-09 广西天能科技有限公司 DCS redundancy control system for foodstuff grade terpenes resin production line
CN106054757A (en) * 2016-08-18 2016-10-26 河北永新纸业有限公司 DCS automatic control system
CN107287110A (en) * 2016-04-11 2017-10-24 天津职业技术师范大学 Applied to the Predictive Control System in injection sugar production

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104898586A (en) * 2014-09-15 2015-09-09 广西天能科技有限公司 DCS redundancy control system for foodstuff grade terpenes resin production line
CN107287110A (en) * 2016-04-11 2017-10-24 天津职业技术师范大学 Applied to the Predictive Control System in injection sugar production
CN106054757A (en) * 2016-08-18 2016-10-26 河北永新纸业有限公司 DCS automatic control system

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Effective date of registration: 20150320

Address after: 200031 Xuhui District, Hengshan Road, No. 10,

Patentee after: SHANGHAI HENGTUO INDUSTRY DEVELOPMENT CO., LTD.

Address before: 200031 Xuhui District, Hengshan Road, No. 10,

Patentee before: No.704 Institute of China Shipbuilding Industry Corporation

ASS Succession or assignment of patent right

Owner name: SHANGHAI HUNTER INDUSTRY DEVELOPMENT CORP., LTD.

Free format text: FORMER OWNER: NO.704 RESEARCH INSTITUTE, CHINA SHIPBUILDING INDUSTRY CORPORATION

Effective date: 20150320

C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20160708

Address after: 200031 room 43, building 10, No. 105, Xuhui District, Shanghai, Hengshan Road

Patentee after: Shanghai Dake hydraulic Electromechanical Engineering Co., Ltd.

Address before: 200031 Xuhui District, Hengshan Road, No. 10,

Patentee before: SHANGHAI HENGTUO INDUSTRY DEVELOPMENT CO., LTD.

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20180712

Address after: 200031 Hengshan Road, Xuhui District, Shanghai, No. 10

Patentee after: SHANGHAI HENGTUO INDUSTRY DEVELOPMENT CO., LTD.

Address before: 200031 105 rooms, No. 10, Hengshan Road, Xuhui District, Shanghai

Patentee before: Shanghai Dake hydraulic Electromechanical Engineering Co., Ltd.

TR01 Transfer of patent right