EP2021924A1 - Method and device for exchanging data on the basis of the opc communications protocol between redundant process automation components - Google Patents
Method and device for exchanging data on the basis of the opc communications protocol between redundant process automation componentsInfo
- Publication number
- EP2021924A1 EP2021924A1 EP07704284A EP07704284A EP2021924A1 EP 2021924 A1 EP2021924 A1 EP 2021924A1 EP 07704284 A EP07704284 A EP 07704284A EP 07704284 A EP07704284 A EP 07704284A EP 2021924 A1 EP2021924 A1 EP 2021924A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opc
- master
- server
- standby
- client
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/26—Special purpose or proprietary protocols or architectures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34263—OLE object linking and embedding, OPC ole for process control
Definitions
- the invention relates to a method for exchanging data based on the OPC communication protocol, wherein at least one standby OPC server is connected in parallel to a master OPC server.
- the invention further relates to a device which is designed to carry out the method according to the invention.
- OPC is a standardized communication protocol specified by the OPC Foundation (www.opcfoundation.org). OPC stands at ⁇ for OLE ( "object linking and embedding") for Process Control. OPC is an open standard.
- Process automation systems are usually divided into three hierarchically arranged automation levels.
- the upper automation level which is often referred to as a control level or operating level, are mostly personal ⁇ computer used.
- the tasks there are, for example, the operation, observation, presentation, archiving and optimization of the process operations. Because of their extremely high availability, so-called preferred.
- Memory Program ⁇ -programmed logic controllers are used in the underlying control level (control layer), which, since they usually only control a part of the process, and decentralized automation ⁇ called tretesakuen.
- the PLC via respective connections detect the product detected by sensors zessmesshong, wherein the sensors detect directly at the respective part ⁇ process, for example, to a turbine or electrical generator see, in the so-called.
- the process measured values acquired by the sensors can also be passed on by microcontrollers arranged in the field level to the respective or the respective PLC or by the Microcontrollers themselves are formed.
- the PLC can address the sub-processes, for example the turbine, via control signals and possibly via the microcontroller, the actuators arranged in the field level.
- the automation devices such as memory Program ⁇ -optimized controls, which are found for example in the control plane, and personal computers, which are found for example in the operating level of a large power plant, communi ⁇ adorn themselves and among each nikationsprotokolle mostly by proprietary commu ⁇ .
- These communication protocols under ⁇ divorce usually not only between different manufacturers, but often steller between devices of the same manufacturer. This makes communication with other automati ⁇ s mecanicsischen devices without complex measures impossible. So it is only at high cost possible such existing automated system with automatmaschinestechni ⁇ rule devices or software programs to expand other manufacturers to modify or modernize.
- OPC interfaces Ie was developed and agreed as a standard in the field of mitautoma ⁇ automation.
- the data exchange of an OPC communication is carried out in general on my n-active compounds, one always higher availability for a communication based on the OPC Kom ⁇ munication is required correspondingly shorter downtime or default frequencies. That's why For OPC-based communication, a secure OPC connection is desirable.
- So Be ⁇ can serve images frequently arranged in the operating level HMI's (human machine interfaces) disturbed by switching the ⁇ and must therefore be time consuming renewed by new query. Likewise, operator inputs and control commands can be lost. This is a considerable disadvantage, especially in time-critical operations, which can lead to dangerous system conditions. In addition, archives must be kept multiple times, as a complete capture and archiving in the switching phase is not ensured. A further disadvantage is that process states and process alarms must be updated in the switching phase or in the re-integration.
- the object of the invention is to provide a method and Vorrich- processing for exchanging data on the basis of the OPC communication protocol to specify, with the or by switching ⁇ operations complications, in particular, downtime can be avoided.
- the object is according to the invention with the aforementioned
- the OPC client switches at least partially from the master OPC server to the at least one standby OPC server in such a way that the program execution is continued bumplessly at the same location.
- each OPC server - whose essential tasks consist in obtaining the data or process values from the field levels or controller levels and providing these data in OPC format, and also status and to determine and process error information - an OPC client is operated or installed on a separate computer, but instead parallel or switched, ie redundantly executed, OPC servers, comprising a master OPC server and at least one standby OPC server. Server, connected via separate communication links to a common OPC client.
- the OPC client is designed to recognize an incident from the received data.
- the OPC client switches from the active master OPC server, via which the exchange of data and process variables for controlling or regulating the power plant takes place during normal operation of the power plant, at least partially to the standby mode.
- OPC server also called standby OPC server.
- the switchover can be complete, ie the standby OPC server completely takes over the control tasks of the master OPC server, as is the case in the case of a very pronounced incident.
- the inventive connection of the standby OPC server and the master OPC server with a common OPC client allows in contrast to known solutions an uninterruptible switching.
- the operation is not chen underbro ⁇ and operator inputs are not lost and must not therefore be repeated. Archives are updated consistently and thus have no gaps. A explizi ⁇ tes update is not required.
- the "Operating" interrup ⁇ can the power plant in case of failure will be continued monitoring free.
- a separate selection of equipment and operator screens is not required, but made before the fault selection of equipment and operator screens is automatically accepted and complete over- would take all Alarms, messages or status displays are ensured, regardless of a hardware malfunction, even in critical situations the system operator or operator can detect fault conditions in the system and shut down the system and operate safely. Disruptions and system downtime associated with high costs are thereby avoided.
- the automation devices such as controllers, also redundant in the form of a standby controller and a master controller, constructed, the redundancy management is carried out independently by the controllers and the master OPC server on the redundant connecting lines each with the master - Controllers and the standby OPC server is connected to the standby controllers.
- the controller is taken over by the standby controller and the data or process variables are exchanged via the standby OPC server to the OPC client.
- the I / O level can also be configured redundantly in a similar way. Overall, the overall availability of an automation solution is significantly increased by using the two OPC servers in conjunction with a "user-granular" switchover option.
- the OPC client is making redundant ⁇ comprising a master OPC client and at least egg ⁇ NEN standby OPC client, in case of error between the master OPC client and the at least one Standby OPC client is switched so that the program execution is continued bumplessly in the same place, the master OPC client and the at least one standby OPC client Client for the master OPC server and the at least one standby OPC server are recognizable only as the OPC client.
- the redundantly configured OPC client is preferably designed according to the single system image principle or according to the single application image principle or works according to these principles.
- Single system image means that the entire memory or the entire memory image of the master OPC client is also on the standby OPC client available while the single-image A bearing the application iden ⁇ is romantic, but quite System Components can be different.
- the OPC client depending on the degree of error, at least partially switches over from the master OPC server to the at least one standby OPC server.
- the invention further relates to a device for carrying out the method according to the invention, in which at least one standby OPC server is connected in parallel to a master OPC server, and in which an OPC client via a first communication link with the master OPC Server and via at least a second communication connection with the at least one standby OPC server, and in which the OPC client is adapted to the first communication link and the master OPC server and the at least second communication link and to exchange data with the at least one standby OPC server with automation devices and to evaluate the data coming from the master OPC server and the at least one standby OPC server, wherein the OPC client is further configured, in the event of a fault, at least partially switch from the master OPC server to the at least one standby OPC server so that the Progra bump-free in the same place.
- the OPC client is configured redundantly, comprising a master OPC client and at least one standby OPC client, wherein the OPC client is designed, in the event of a fault, between the master OPC client and the at least to switch a standby OPC client so that program execution continues smoothly at the same location, the master OPC client and the at least one standby OPC client for the master OPC server and at least one standby OPC servers are only recognizable as the OPC client.
- Preference is given to a case that the redundant abandoned ⁇ finished OPC client det trained on a fault-tolerant computer.
- the master OPC client on a FEH ⁇ lertoleranten computer is arranged and formed at least one standby OPC client on at least one further FEH ⁇ lertoleranten computer.
- Exemplary embodiments of devices for exchanging data based on the OPC communication protocol will be explained in more detail below. It shows:
- FIG. 1 shows a schematic representation of a device according to the invention for exchanging data on the basis of the OPC communication protocol
- FIG. 2 shows a schematic representation of a device for exchanging data known from the prior art on the basis of the OPC communication protocol
- FIG. 3 shows a schematic representation of a further device according to the invention for exchanging data on the basis of the OPC communication protocol
- FIG. 4 shows a schematic representation of individual components of a power plant automation system.
- the 1 shows an inventive device 10 for off ⁇ exchange of data based on the OPC communication protocol.
- the lower half shows the typical automation s réellesebene or field level 12, each of three car ⁇ matmaschinesservern 14 is to assume that each different in power plant operation control functions.
- Each of the three automation servers 14 is redundantly designed by means of two modules in the form of two controllers, namely a master controller 16 and a standby controller 16 '.
- Data or process variables of the individual automation servers 14 are transmitted via a likewise redundantly designed plant bus 18 (the redundancy is symbolized in FIG. 1 by the broad line width) via two OPC controller interfaces 20, 20 'to a master OPC server 22 or a standby OPC server 24 of a separate server hardware.
- One of the buses of the redundant ⁇ stored system bus 18 is in this case via the OPC Control- ler interfaces 20 connect to the master OPC-Ser-ver 22 forth; the other bus of the redundant system bus 18 establishes a connection to the standby OPC server 24 via the other OPC controller interface 20 '.
- 24 transmitted data or process variables are converted by the two OPC reserves 22, 24 in the OPC format and via two separate communica ⁇ tion connections assigned to a common OPC client 28 26th
- the OPC client 28 controls and monitors the OPC server 22, 24 and is installed as an access layer on a fault-tolerant HMI (Human Machine Interface) server 30 at ⁇ .
- the OPC client 28 is designed to be redundant according to the singe application image principle.
- a fault that is, when an error or fault is reported to the OPC client 28, it switches from the master OPC server 22, via which the control or regulation of a power plant component takes place during the trouble-free power plant operation, to the standby OPC Server 24 um. Carried out the switchover can here, especially on a large Stö ⁇ tion or carried out an extensive failure completely so that all the control / regulating operations on the Ready ⁇ nomic OPC server 24th However, depending on the extent of the error, only a partial changeover can take place. This is especially true when one of the master controller 16 reports a fault to the OPC client 28.
- the OPC client 28 switches over to the standby OPC server 24 in such a way that the control of the standby controller 16 'provided for achieving the redundancy now takes place via this.
- the total availability of a Automatmaschineslö ⁇ can be sung increased according to the invention.
- this is also protected, in addition to the OPC servers 22, 24, which only recognize it as an OPC client 28.
- the switching takes place-both from the master OPC server 22 to the standby OPC server 24 and also from the master OPC server 22.
- OPC client to the standby OPC client (not Darge ⁇ sets) -
- the invention called in contrast to known Lösun ⁇ , without interruption, so that the operator is not broken out among ⁇ and operator inputs are not lost.
- FIG. 2 schematically shows, for comparison with the device according to the invention shown in FIG. 1, a device known from the prior art for exchanging data on the basis of the OPC communication protocol.
- the individual single controller 16, 16 sets' together with the plant 18 redundantly ⁇ .
- the standby OPC server 24 and the master OPC server 22 are not connected via a common OPC client, as is the case according to the invention. A trouble-free switching between such separated OPC servers 22, 24 can not be done.
- FIG. 3 shows a schematic representation of another device 10 according to the invention for exchanging data on the basis of the OPC communication protocol.
- Two automation servers 14, which are each provided with a number of modules in the form of controllers 16, 16 'and each have a CPU 32, 32', are of redundant design, ie the individual controllers 16, 16 ', the CPU 32 , 32 'and also the I / O level (not shown) are designed to be redundant, with the controllers 16' and the CPU 32 'respectively representing the respective standby controllers and the standby CPU, respectively.
- the plant bus 18 is accordingly designed redundantly.
- the OPC client 28 is here on aCentraltole ⁇ Ranten HMI (Human Machine Interface) server 30 installed and configured redundantly, as symbolized by the graphics.
- FIG. 4 shows a schematic representation of individual components of a power plant automation system, reindeer in the obe ⁇ row from left to right schematically a master HMI CPU 34, a master OPC server 36, a master plant bus interface 38, a master Automation system 40 and a master I / O module 42 are shown.
- a master HMI CPU 34 a master OPC server 36
- a master plant bus interface 38 a master Automation system 40
- a master I / O module 42 are shown in the lower Rei ⁇ hey.
- the illustration in FIG. 4 shows schematically how availability of the power plant automation system is increased by a partial switchover to individual standby components 34 ', 36', 38 ', 40' and 42 '.
- the faulty components 36 and 40 can be masked out by the dashed path, while the intact components 34, 38 and 42 of the "parallel line"
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- Hardware Redundancy (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07704284A EP2021924A1 (en) | 2006-05-26 | 2007-02-01 | Method and device for exchanging data on the basis of the opc communications protocol between redundant process automation components |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06010923A EP1860564A1 (en) | 2006-05-26 | 2006-05-26 | Method and device for exchanging data based on the OPC communication protocol between the redundant components of a process control system |
PCT/EP2007/050962 WO2007137880A1 (en) | 2006-05-26 | 2007-02-01 | Method and device for exchanging data on the basis of the opc communications protocol between redundant process automation components |
EP07704284A EP2021924A1 (en) | 2006-05-26 | 2007-02-01 | Method and device for exchanging data on the basis of the opc communications protocol between redundant process automation components |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2021924A1 true EP2021924A1 (en) | 2009-02-11 |
Family
ID=36809266
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06010923A Withdrawn EP1860564A1 (en) | 2006-05-26 | 2006-05-26 | Method and device for exchanging data based on the OPC communication protocol between the redundant components of a process control system |
EP07704284A Ceased EP2021924A1 (en) | 2006-05-26 | 2007-02-01 | Method and device for exchanging data on the basis of the opc communications protocol between redundant process automation components |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06010923A Withdrawn EP1860564A1 (en) | 2006-05-26 | 2006-05-26 | Method and device for exchanging data based on the OPC communication protocol between the redundant components of a process control system |
Country Status (3)
Country | Link |
---|---|
US (1) | US8132042B2 (en) |
EP (2) | EP1860564A1 (en) |
WO (1) | WO2007137880A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1591849A1 (en) * | 2004-04-27 | 2005-11-02 | Siemens Aktiengesellschaft | Redundant automation system comprising a master and a stand-by automation device |
DE102007062985B4 (en) * | 2007-12-21 | 2014-01-02 | Abb Research Ltd. | Method and device for communication according to the standard protocol OPC UA in a client-server system |
DE102012003242A1 (en) | 2012-02-20 | 2013-08-22 | Phoenix Contact Gmbh & Co. Kg | Method for fail-safe operation of a process control system with redundant control devices |
CN103309326A (en) * | 2013-06-08 | 2013-09-18 | 无锡商业职业技术学院 | OPC-based data storage server |
US10018997B2 (en) * | 2013-06-28 | 2018-07-10 | Fisher-Rosemount Systems, Inc. | Non-intrusive data analytics in a process control system |
US9280426B2 (en) * | 2013-07-24 | 2016-03-08 | Solar Turbines Incorporated | System and method for server redundancy |
EP2945034A1 (en) * | 2014-05-16 | 2015-11-18 | Siemens Aktiengesellschaft | Method of protection of redundant servers coupled to a MES |
WO2016016135A1 (en) * | 2014-07-30 | 2016-02-04 | Siemens Aktiengesellschaft | Method and system for assigning a control authorization to a computer |
DE102016116751A1 (en) | 2016-09-07 | 2018-03-08 | Xtronic Gmbh | Bus system for realizing an electronic control or electrical regulation and vehicle |
BR112019014415A2 (en) * | 2017-01-16 | 2020-04-14 | Sicpa Holding Sa | system and method for controlling a plurality of lines, where each line is at least one of a production line and a distribution line |
FI128846B (en) * | 2017-03-20 | 2021-01-29 | Beamex Oy Ab | Automatic calibration of a measurement circuit |
JP6333504B1 (en) * | 2017-04-18 | 2018-05-30 | 三菱電機株式会社 | Data server unit and communication system |
DE102017123222A1 (en) | 2017-10-06 | 2019-04-11 | Endress + Hauser Process Solutions Ag | Method for operating a plant of automation technology |
CN111083198B (en) * | 2019-11-22 | 2022-07-05 | 浙江中控技术股份有限公司 | Communication link switching method, master domain server, slave domain server and system |
CN112947348A (en) * | 2021-03-25 | 2021-06-11 | 超越科技股份有限公司 | Intelligent factory industry internet system architecture |
EP4312418A1 (en) * | 2022-07-29 | 2024-01-31 | Abb Schweiz Ag | Method for automatic selection of servers |
CN115297173A (en) * | 2022-08-03 | 2022-11-04 | 国核自仪系统工程有限公司 | OPC communication method and OPC communication system |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE519905C2 (en) * | 2001-10-05 | 2003-04-22 | Abb Ab | Data access method for a control system |
US8856345B2 (en) * | 2002-03-11 | 2014-10-07 | Metso Automation Oy | Redundancy in process control system |
US7496668B2 (en) * | 2002-06-28 | 2009-02-24 | Honeywell International Inc. | OPC server redirection manager |
JP3937230B2 (en) * | 2003-07-29 | 2007-06-27 | 横河電機株式会社 | Process data collection device |
US20060056285A1 (en) * | 2004-09-16 | 2006-03-16 | Krajewski John J Iii | Configuring redundancy in a supervisory process control system |
US8234384B2 (en) * | 2006-11-13 | 2012-07-31 | Jemmac Software Limited | Computer systems and methods for process control environments |
EP2087433A4 (en) * | 2006-11-14 | 2017-11-29 | ABB, Inc. | System for storing and presenting sensor and spectral data for batch processes |
DE102008024668A1 (en) * | 2007-05-24 | 2008-11-27 | ABB Inc., Norwalk | Inventory monitor for fieldbus devices |
-
2006
- 2006-05-26 EP EP06010923A patent/EP1860564A1/en not_active Withdrawn
-
2007
- 2007-02-01 WO PCT/EP2007/050962 patent/WO2007137880A1/en active Application Filing
- 2007-02-01 US US12/227,740 patent/US8132042B2/en not_active Expired - Fee Related
- 2007-02-01 EP EP07704284A patent/EP2021924A1/en not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO2007137880A1 * |
Also Published As
Publication number | Publication date |
---|---|
US8132042B2 (en) | 2012-03-06 |
US20100005336A1 (en) | 2010-01-07 |
WO2007137880A1 (en) | 2007-12-06 |
EP1860564A1 (en) | 2007-11-28 |
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