System Architecture of CENTUM CS 3000 - …

1 System Architecture of CENTUM CS 30001 System Architecture OFCENTUM CS 3000 KONISHI Nobuaki *1 Since 1997, Yokogawa has adopted Enterprise Technology Solutions as itsnew business concept. ETS is a commitment to the aim of providing optimumsolutions from the viewpoint of enterprise management, to satisfy every customer srequirements and expectations with the state-of-the-art technology, and the fields itcovers range from control to enterprise information management. As a coreproduct in the control domain of overall ETS solutions, we have developed theCENTUM CS 3000 , a process control System for large-scale plants.

2 To provide anopen Architecture , the operating System Windows NT, which has already become ade facto standard, is used as the human interface. Control functions of theCENTUM CS 3000 are configured by field-proven hardware and software to assurehigh paper describes the features, functions, and Architecture of theCENTUM CS 3000 .*1 Industrial Automation System Business DivisionINTRODUCTIOND rastic changes in the economy of manufacturing industries,has led to increasing demand for plant operations to reducepersonnel, improve efficiency, and increase the operation rate offacilities. On the other hand, for plants to operate safely,improvements in reliability and operational safety cannot role of the process control System used to be simplycontrolling plant operations, but now, there is the need to meet therequirement to closely link this to the enterprise managementinformation System and production management have also been drastic changes in the field ofinformation technology (IT).

3 Before we knew it, our office deskswere occupied by personal this climate of enormous change, open-architecturesystems using de facto standards have become an integral part ofcurrent times. In 1997, Yokogawa introduced the CENTUM CS1000 distributed control System for medium- and small-scaleplants. The CENTUM CS 1000 is an open- Architecture DCSusing Windows NT as the operating System of its humaninterface, which was already a de facto standard in the field of ITat that time,.Now, as an evolution from the CENTUM CS 1000, we havedeveloped the CENTUM CS 3000 process control System that iscapable of controlling a large-scale plant.

4 Featuring de factostandard functions and armed with control functions furtherFigure 1 CENTUM CS 30002 Yokogawa Technical Report English Edition, No. 28 (1999)enhanced from the sound functions of earlier CENTUM systems,the CENTUM CS 3000 gives the following benefits to users:(1) Improvement of operation efficiency with multi-windowdisplay and other up-to-date technology(2) Close link with information systems in an upper level(3) Further improvement of automation and controllabilitySYSTEM OVERVEWF igure 1 shows the components of CENTUM CS 3000 . Thegreatest feature of the CENTUM CS 3000 is the use of WindowsNT as the operating System of components for operation andmonitoring, which thus achieves a truly open Architecture byallowing the application of general-purpose personal computersfor the human 2 shows the System configuration of the CENTUM OF CENTUMT wenty-four years have passed since the CENTUM wasrolled out as the world s first DCS in 1975.

5 Up until now therehave been several model changes. The first CENTUM had built-in microprocessors which at the time had begun to gather publicattention as a technology offering great promise, and establishedthe basic Architecture of the CENTUM series in which the humaninterface and controllers are separated from one another andconnected on a control bus. The first CENTUM introduced a newscheme, process operation and monitoring via CRTs andkeyboards, to the world of process control. Present DCSs haveinherited the basic Architecture established by the microprocessors advanced from 16-bit design to 32-bitdesign, Yokogawa released the CENTUM V in 1983 and theCENTUM-XL in 1988.

6 Although at that time it was acknowl-edged that customers were dissatisfied with the fact that DCSswere closed systems, Yokogawa was focusing on incorporatinginto the CENTUM original devices and developing original oper-ating systems and other software in order to gain better perfor-mance, by improving real-time controllability of controllers, in-creasing application capacity, and reducing the display retrievaltime for the human interface. Each EOPS operator station, thehuman interface of the CENTUM -XL, was composed of up to 4 CRTs with 32-bit built-in processor, representing the best perfor-mance in those the CENTUM V, the market moved towards unifyingthe operating System and other software, and UNIX wasgathering public attention.

7 In response to this trend, UNIX wasemployed as the operating System of the ENGS engineeringworkstation, which was used for System generation andmodification in the CENTUM -XL. Furthermore, the debut of theCENTUM CS in 1993 overthrew the common sense of those daysby employing UNIX as the operating System of ICS humaninterface stations in addition to the engineering workstation. Thismeans that the operating System was unified through all stationsexcept for control stations. In response to the dissatisfaction withthe fact that DCSs were closed systems, the employment ofUNIX enabled DCSs, made it possible to exchange data withexternal systems over a LAN and recent years in the field of IT, Microsoft Windows hasovertaken UNIX and greatly changed the world of IBM PC/AT-compatible machines were chosen asstandard hardware specifications and Windows strove to presentUNIX-basedComputerComputerEtherne tCENTUM CSACGEWSICSExaOpc StationWindowsNT-basedNetworkCS FCSLFCSSFCSBCVV netHF BusCENTUMV.

8 XLCENTUM CS 3000 Console HISD esktop HISF igure 2 System Configuration of CENTUM CS 3000 System Architecture of CENTUM CS 30003a more open Architecture than UNIX could ever have done. TheCENTUM CS 3000 was developed under such conditions ofchange in the field of PerformanceIn addition to the advanced and highly flexible controlfunctions of earlier CENTUM systems, the CENTUM CS 3000now includes the following features: Equipped with the OLE for Process Control (OPC) Serverfunction. Supports the FOUNDATIONTM Fieldbus for integration withnetworks of field sensors and actuators. Allows programmable logic controllers (PLCs) to beconnected easily.

9 The open engineering data structure allows external tools tobe used for generating, modifying, and managing OperabilityUsing Windows NT in the human interface, the CENTUMCS 3000 : Allows Windows-based operations, which are familiar tomost PC users. Allows vendor standard, low-priced PC hardware to be usedas the human interfaces. Allows data to be exchanged with a diverse range of softwareavailable on the market, including business Productivity of EngineeringInheriting the simplicity of engineering from the CENTUMCS 1000, the CENTUM CS 3000 has additional engineeringfunctions that are suitable for the control systems of large-scaleplants.

10 During the life cycle of a plant, a DCS may often bemodified and expanded. In the CENTUM CS 3000 , engineeringof System modifications and expansions can be isolated from theoperation of the existing System so that engineering can beimplemented efficiently without effecting plant operation duringthe engineering CONFIGURATIONS ystem ScaleThe scale of the CENTUM CS 3000 is the same as theCENTUM CS, as shown below:Maximum number of domains:16 Maximum number of stations:64 per domainMaximum number of stations in total: 256 Maximum number of tags:100,000 Operator StationsIn the CENTUM CS 3000 , operator stations are generallyreferred to as human interface stations (HISs in short).