C10-IEC61499

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OPEN DISTRIBUTED AUTOMATION AND CONTROL WITH IEC 61499

JHC/2001-04-03 p. 1

presented at: IEC Workshop on Automation Objects

Geneva, Switzerland2001-04-03

by: JAMES H. CHRISTENSEN , Ph.D.Senior Principal Engineer

Rockwell [email protected]

Open Distributed Automation and Controlwith IEC 61499


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JHC/2001-04-03 p. 2



• Background

• Architecture

• Object Models• Software Tool Requirements

• Status and Future

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JHC/2001-04-03 p. 3

Distributed Automation:

An Architectural Dialectic

Distributed Automation:An Architectural Dialectic

distributability

agility

programmability

agility

agilitydistributabilityconfigurabilityprogrammability

Agile

Manufacturing

Function Blocks

IEC 61499

PLCIEC 61131-3

CentralizedProgrammableConfigurable

DCS

IEC 61804

Thesis

Antithesis

DistributedConfigurable

Synthesis

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JHC/2001-04-03 p. 4

IEC 61131-3: Modern (1993) Software

Engineering for Automation and Control

IEC 61131-3: Modern (1993) Software

Engineering for Automation and Control

• Encapsulation/Reuse Mechanisms

– Function Blocks, Functions, Data Types, Programs• Application-adapted Languages

– Ladder Diagram (LD) for logic control (“power flow”)

– Function Block Diagram (FBD) for regulatory control (“data flow”)

– Sequential Function Chart (SFC) for state-machine control

– Structured Text (ST) for information processing

– Instruction List (IL) for assembly-level programming

• A Mature, Internationally Adopted Standard – First edition: 1993

– Second edition: 2001

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JHC/2001-04-03 p. 5

Function Blocks: Object-Oriented

Encapsulation and Reuse in IEC 61131-3

Function Blocks: Object-Oriented

Encapsulation and Reuse in IEC 61131-3

Control Algorithm Specification

External Interface Specification

INBOOL

DB_TIMETIME

OUT BOOL

DEBOUNCE

DB_FF

S1

R

Q1OFF_TMR

TON

IN

PT

Q

ET

OUT

DB_TIME

IN IN

PT

Q

ET

TON

ON_TMR

SR

IN

PT

Q

ET

TON

OFF_TMR

ON_TMR

TON

IN

PT

Q

ET

| |

IN

|/|IN

(R)OUT

(S)

OUT

DB_TIME

DB_TIME

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Centralized System Configuration in IEC 61131-3Centralized System Configuration in IEC 61131-3

CONFIGURATION

RESOURCE

TASK TASK

PROGRAM PROGRAM

FB FB

RESOURCE

TASK TASK

PROGRAM PROGRAM

FB FB

GLOBAL and DIRECTLY

ACCESS PATHS

REPRESENTED VARIABLES

Communication function

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JHC/2001-04-03 p. 7

Distributed Configuration in Fieldbus Systems(Physical View)Distributed Configuration in Fieldbus Systems(Physical View)

Control RoomPC

H1 FieldbusSegment # 1

H1 Fieldbus

Segment # 2

CV-101A/O

IP102

20

19

21

AT107A

LT101

AT107B

TT105

AT106

Re-Burned

Lime

LT108

Purchased

Lime

LT112

GreenLiquorStorage

IP104A

IP104B

Heater Cooler

LT111

SC111

SC112

SC108

DT109

FT110

SC110

TT104

FT102

AT103

24

25

23

22

H1 FieldbusSegment # 3

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JHC/2001-04-03 p. 8

Distributed Configuration in Fieldbus Systems

(Logical View)

Distributed Configuration in Fieldbus Systems

(Logical View)

AI ISEL PID

AIAI

PID RATIO

AI

AO

CV-102A/O

Conductivity

PID AOAI LL

FIC102

AT107B

AT107A

AT106

AT103

IP102FT102

SC103 HS

107

AIC107

AC106

FRC103

AY103

AT107A

AT107B HS107 AIC107 AIC106 FRC103 SC103

IP102FIC102FT102

AT106

AY103AT103

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JHC/2001-04-03 p. 9

Basic Concepts of IEC 61499Basic Concepts of IEC 61499

• Distributed applications

• Object-oriented softwareencapsulation and reuse

• Event and data interfaces

• Event-driven state machines

• Service interfaces

• Management services• Software portability

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JHC/2001-04-03 p. 10

System Architecture for Distributed ApplicationsSystem Architecture for Distributed Applications

Event flow

Data flow

Communication network(s)

Device 2 Device 3 Device 4Device 1

Application A

Appl. C Application B

Controlled process

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Device ArchitectureDevice Architecture

• Device = Container for Resources

• Device provides Communications & Process Interfaces

Communication link(s)

Resource x

Controlled process

Resource zResource y

Application BApplication C

Application A

Device boundaryCommunication interface(s)

Process interface(s)

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Resource ArchitectureResource Architecture

• Resource schedules & executes FB algorithms

• Resource maps Communications & Process I/OFunctions to Service Interface Function Blocks

FunctionBlock

Local application(or local part of distributed application)

Communication mapping

Communication functions

Process I/O functions

Process mapping

Data

Events

Service

Algorithm

Scheduling Function

InterfaceFunction

Block

ServiceInterface

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JHC/2001-04-03 p. 13

Event and Data InterfacesEvent and Data Interfaces

Data outputsData inputs

Event outputsEvent inputs

Data flow

Event flow

Event/Data

Associations

Event flow

Data flow

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Event-Driven Execution ControlEvent-Driven Execution Control

Execution control

function

Scheduling function

Algorithm

2 8

1

5

4 63

7

= sampling

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JHC/2001-04-03 p. 15

Encapsulation and Reuse:

Basic Function Block Types

Encapsulation and Reuse:

Basic Function Block Types

Output variablesInput variables

Event inputs Event outputs

Algorithms

Type identifier

(IEC 1131-3)

Internalvariables

ExecutionControlChart

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JHC/2001-04-03 p. 16

Software Encapsulation and Reuse:

Composite Function Block Types

Software Encapsulation and Reuse:

Composite Function Block Types

Output variablesInput variables

Event inputs Event outputs

Type identifier

ExecutionControl

• Functional composition• Reusable• Atomic (not distributable)

– "subapplications" are distributable

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JHC/2001-04-03 p. 17

Adapter InterfacesAdapter Interfaces

adapter connection

EI EO

DI DO

EIEO

DIDO

provider acceptor

socket plug

• Reduce diagram clutter

• Simplify transducer interface

• Capture patterns of interaction

O D S R B D O O D CO RO C

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JHC/2001-04-03 p. 18


Open Distributed Automation and Control

with IEC 61499

• Background

• Architecture

• Object Models

• Software Tool Requirements

• Status and Future


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JHC/2001-04-03 p. 19

System Management ModelSystem Management Model


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JHC/2001-04-03 p. 20

Software Tool ModelsSoftware Tool Models


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JHC/2001-04-03 p. 21

Open Distributed Systems: The IEC 61499 VisionOpen Distributed Systems: The IEC 61499 Vision

ProjectRepository

SoftwareTools

DeviceNet EDSsFieldbus DDsIEC 61915ISO 15745ISO 10303

etc.

Libraries:IEC 61499IEC 61131-3

import

XML

PORTABILITY

Standard management protocols ==> CONFIGURABILITY

Standard data transfer protocols ==> INTEROPERABILITY

Distributed intelligent devices & controllers

KEY:Existing & Normative in IEC 61499Existing but non-Normative in IEC 61499To be defined or implementation-dependent


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JHC/2001-04-03 p. 22

Software Tool Requirements (1)Software Tool Requirements (1)

• Information to be provided by tool supplier – Applicable library element type(s) – Engineering task(s) supported

• Exchange of library elements – via XML per defined DTDs for:» data types» other library elements

• Information to be provided by library element supplier

– sufficient to enable the user to fully determine functionality – at a minimum, event + data interfaces + service specification – IP protection allowed when element implementation is provided

• Display of declarations – in a form appropriate to the engineering task

• Modification of declarations – as appropriate to the engineering task


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O O O O O 99

JHC/2001-04-03 p. 23

Software Tool Requirements (2)Software Tool Requirements (2)

• Validation of declarations – as required by the associated engineering task – examples:

» syntax checking

» semantic checking» simulation and testing, individually and in combinations

• Implementation of declarations – as required by the associated engineering task – examples:

» production of executable code ("firmware")» creation and interconnection of function block instances

in devices and resources

• System operation, testing and maintenance – as required by the associated engineering task – examples:

» facilities described above» configuration/operation of information interchange» management services


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JHC/2001-04-03 p. 24

IEC Project 61499 Status & FutureIEC Project 61499 Status & Future

• PASs (Publicly Available Specifications) – IEC PAS 61499-1, Architecture

– IEC PAS 61499-2, Software tool requirements

• Ongoing Work – 61499-3, Application guidelines

– (to be proposed) 61499-4, Rules for compliance profiles

• 2-year trial use period – Incorporate lessons learned from trial implementations

– Parts 1,2 CDVs projected: 2003-10-01


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JHC/2001-04-03 p. 25

First Feasibility Demonstration:Kitakyushu City, Japan, 2000-10-20

First Feasibility Demonstration:Kitakyushu City, Japan, 2000-10-20

Operator Interface + Logging

HIgh-Level Control, Monitoring + Diagnostics

Machine Control

Machine #2

High-level Service Interfaces

Control-level Service Interfaces

I/OServiceInterfaces

Machine #1

Simulation

Machine Control Machine Control

C10-IEC61499

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