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Informationsmodellierung in AutomatisierungsmiddlewareAm Beispiel OPC UA und IEC 61850

Wolfgang Mahnke, Industrial Software Systems, ABB Forschungszentrum Ladenburg

Overview

Middleware in Automation

Why Information Modeling?

Standardized Middleware in Automation• Overview OPC Unified Architecture• Overview IEC 61850

Comparison of Modeling Concepts

Conclusion

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Middleware in Automation A Simplified View

ERP (Enterprise Resource Planning)

MES (Manufacturing Execution System)

SCADA (Supervisory Control and Data Acquisition)

DCS (Distributed Control System)

PLC (Programmable Logical Controller)

DE: SPS (Speicherprogrammierbare Steuerung)

Devices: Actors and Sensors

Middleware

Different Level of Interoperability

Overview Information Modeling

Why Information Modeling?

• Not communicating Data but exchanging Information• Bringing Semantic into the Data• Provides Meta Data to the Data

• Engineering Unit for Measurement• Information on Measuring Device• Represent Control Logic like Function Blocks• Represent Domain Model like Breaker

Communication• Communicating Data• Common Syntax of Data

Information Model• Vendor-specific Information

Model• Semantic Provided• Common Meta Model

Standardized Information Model• Common Semantic• Common Understanding• Common Interaction

Sequences

Standardized Information Models in AutomationExamples

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ISA-88(Batch Control)

ISA-95(integration of control

system with enterprise system, MES)

CIM –IEC 61968+61970(power distribution and

transmission)

IEC 61131-3(Programming model for

control logic)

IEC 61850(substation automation)

Device Integration(EDDL, FDT, FDI)

CAEX – IEC 62424(Engineering)

ISO 15926(Lifecycle Information

Exchange)

ADI(Analyzer Devices)

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Application X ...

DCS ControllerPLC

Application Y

Problem of Classic OPC

DisplayApplication

TrendApplication

OPC OPC

DCS ControllerPLC

Solution -> Classic OPCData Access (DA)Historical Data Access (HDA)Alarms & Events (A&E)

OPC UA(First “real” release 2009)

DCOMretires

.NET New

communication architecture

Web Services

(SOA)

Better interoperability

to Non-Microsoft platforms

BetterIntegration(DA, HDA, AE)

Information Modeling New Features

Change StructuresHistorical Events

Programs

More Areas ofApplication

MES, ERP,Devices

Applied in Automation2500+ Companies 15000+ OPC Products

Overview OPC Unified ArchitectureBackground and Motivation

Base OPC UA Information Model [UA Part 5]

Overview OPC Unified ArchitectureStandard

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Overview: [UA Part 1] [UA Part 2]

Communication Infrastructure[UA Part 6]Web Services

UA TCP

OPC UA Services [UA Part 4]

Standard Information Models [UA Part 8,9,10,11][UA Devices], etc.

OPC UA Meta Model[UA Part 3]Object(Type)

Variable(Type)

etc.

Information Modeling with OPC UAStandardized Information Models

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In discussion

Base OPC UA Information Model(generic model, base types)

OPC UA for Devices(generic model how to represent devices)

OPC UA for Analyser Devices

(specific model for analyzer devices)

OPC UA for IEC 61131-3

(mapping of software model)

ISA-88(Batch Control)

MIMOSA(standard for plant

operations and maintenance)

ISA-95(integration of control

system with enterprise system, MES)

OMAC(integration of different

packaging line functions)

FDI(Field Device Integration)

In developmentReleased

Configuration

Configuration

Status

FactorySettings

AnalyserDeviceType

GetConfiguration

SetConfiguration

SpectrometerDeviceType

MethodSet

TwoStateDiscreteType (DataType: Boolean)

TrueState : PropertyType

FalseState : PropertyTypeOutOfSpecification

FunctionCheck

AnalyserStateMachine

<ChannelIdentifier>

Objects

TrueState

FalseState

TrueState

FalseState

Devices

Device1

Device2

Status

FactorySettings

GetConfiguration

SetConfiguration

MethodSet

OutOfSpecification

FunctionCheck

AnalyserStateMachine

<ChannelIdentifier>

TrueState

FalseState

TrueState

FalseState

Information Modeling with OPC UA

Objects are structuring the Address Space

ObjectTypes define Semantic and Sub-Structure of Objects

ReferenceTypesdefine Semantic of

References

Variables contains Data

Method defines Signature of a Method

Views as excerpts of

Address Space

DataTypes define simple or complex Data Structures

VariableTypes define Sub-Structure and Semantic of Variables

Overview IEC 61850Motivation

Initially developed for Substation AutomationAddresses

Engineering by SCL(Substation System Configuration Language)Communication

Very fast Communication inside the System(Level 2 Ethernet) – GOOSE and Sampled ValuesTCP/IP based Communication (MMS)

Information Modeling to provide SemanticFirst release 2004, strong adaption in Substation AutomationExtensions

IEC61400-25 Wind Turbines (based on IEC 61850)IEC 61850-7-410 Hydro PowerIEC 61850-7-420 Distributed Energy Resources (DER)

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Overview IEC 61850Standard

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Base Model: Common Data Classes [7-3]

Overview and Requirements: [1-5]

Communication Infrastructure[8-1, 9-1, 9-2]

MMS

GOOSE

Sampled Values

Abstract communication service interface (ACSI) [7-2]

Information Models [7-4, 7-410,7-420][61400-25], etc.

Configuration Language

[6]SCL (XML-based)

Meta Model[7-1, 7-2]Logical Node

Data Class

Overview IEC 61850Meta Model

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Information Exchange Model

Server Logical Dev ice

- LDName: ObjectName

Logical Node

- LNName: ObjectName- LNRef: ObjectReference

Data Obj ect

- DataObjectName: ObjectName- DataObjectRef: ObjectReference- m/o/c: CODED ENUM

DataSetBufferedReportControlBlock

UnbufferedReportControlBlock SettingGroupControlBlock Log

LogControlBlock

GOOSEControlBlock

MulticastSampledValueControlBlockUnicastSampledValueControlBlock

Common Data Class

- CDC-ID: Visible String

TypeFile

- Fi leName: Visible String255- Fi leSize: INT32U- LastModified: T imeStamp

Logical Node Class

- LD-ID: Visible String

Data Attribute

- DataAttributeValue: [Defined in Type]- DataAttributeName: Visible String- FunctionalConstraint: FC- TrioOp: TriggerCondition- m/o/c: CODED ENUM

1

0..*

1 1..* 0..1 1..*

1

0..*

1

0..*

1

0..*

1

0..*

1

0..1

1 1..*

1

0..*

1

1

0..*

1

0..*

0..*

+OfType 1

1 0..*

0..1

+hasSubObject 0..*

0..*

+OfType 1

1

0..1

Overview IEC 61850Information Model

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From IEC 61850 7-4

From IEC 61850 7-3

Comparison OPC UA and IEC 61850Modeling Concepts

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Concept IEC 61850 OPC UAHierarchy X XAggregation X XVariable X XFunction - XReference - XClass Partly XMethod - XInheritance - XData Type X X

Taken from: Mahnke, W., Gössling, A., Urbas, L.: Informationsmodellierung für Middleware in der Automatisierung,Automation 2011

Comparison OPC UA and IEC 61850Summary of Comparison

IEC 61850

Started with a meta model tailored for substation automation, including concrete logical node classes

Model can be extended for other domains by defining logical node classes, as done for wind turbines, hydro power, or Distributed Energy Resources (DER)

Not all investigated modeling concepts supported, e.g. subtyping, but suitable for the addressed domains

Addresses also Engineering

OPC UA (IEC 62541)

Provides a generic Model Model and base Information Model providing all investigated modeling concepts

Standardized Information Models using the concepts, like ADI, OPC UA for IEC61131-3 by PLCopen

Does not address Engineering

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Conclusion

Information Modeling becomes part of standardized automation middleware

IEC 61850OPC Unified Architecture

Standardized Information Models can increaseEngineering EfficiencyIntegrationInteroperability

Opportunities to use the provided Semantic – need to be integrated into current tool landscape

VDI / VDE GMA AK 5.16 Middleware in der AutomatisierungResult: VDI/VDE 2657 Blatt 1 "Middleware in der Automatisierungstechnik - Grundlagen" Next Action: Focus on Information Modeling

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