The FOUNDATION Fieldbus Revolution from 4 to 20 … · The FOUNDATION Fieldbus Revolution -from 4 to 20 mA to Digital World 24th of August, 2007, Hotel Intercontinental - The Grand,

Fieldbus Overview India

© 2007 Fieldbus Foundation

Klaus KorstenManager Marketing TechniqueEndress+Hauser Process Solutions

The FOUNDATION FieldbusRevolution

-from 4 to 20 mA to Digital World

24th of August, 2007,Hotel Intercontinental - The Grand,

Andheri (East), Mumbai INDIA

2

Fieldbus Overview - India


Agenda

What is a Fieldbus ? Value Transmission TechnologyDevice IdentificationFunction BlocksControl in the Field (CIF)FOUNDATION Fieldbus certification

3



What is a fieldbus?the fundamental task of a fieldbus system is to exchange

information

in a digital way

with less wiring (unlike point to point connections )

with a number of participants

in a safe way (communication layers)

fast (real-time)

T T

4



Requirements of process industry

Requirements of the process industry for a fieldbus system

open and standardized

robust and easy technology

high degree of freedom to chose

exchange and connection of new devices during operation

to be used in hazardous areas (Eex)

offer additional information as diagnosis …..

5



Value Transmission Technology

digital

analog + digital (hybrid)

analog

4...20 mA

4-20 mA, HART, Fieldbus

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Value transmission technologyDCS

DA

16 bit

AD

16 bit

mA AD

16 bit

AD

16 bit

CPU CPU

CPUCPU

7



Value transmission technology

DA

16 bit

AD

16 bit

mA AD

16 bit

AD

16 bit

CPU CPU

CPUCPU

Identification tag: = PI 012software version: = 1.1serial number: = 0M60237etc. .....1st process value = 70,322nd process value = 23,02engineering unit = mbarstatus = OK diagnosis = temperatur high

DCS

8



Fieldbus digital transmission

SµPASIC

I/O16 bit

ASIC Bus cableD

A

16 bit

1/0/1/1/0...

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Fieldbus wiring

conventional Fieldbus

Process Near Component (PNC)I/O module

marshalling rack

Ex [i] PS

marshalling rack

junction box

Process Near Component (PNC)

cabinet

connection elements

Master / bus coupler Ex [i]

One single cable

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FOUNDATION Fielbus installation

H1 IEC 61158-2IEC 61158-2H1

Up to 16 devices per segment

Configuration tool Visualization

Linking deviceController +Power conditioner

Power conditioner

HSE 100 Mbit/s

11



System architecture

The system architecture of the FOUNDATION Fieldbus can be divided into two subnetworks:

linkingdevice

IEC 61158-2H1H1 IEC 61158-2

32 devices per segment

linkingdevice

H1H1FISCOFISCO

linking

device

PC

field controller HSE 100 Mbit/s

H131.25 kBit/s

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HSE Physical layer HSE (High Speed Ethernet)

PC


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HSE physical layer

defined by the IEEE 802.3 specifications

100 Mbit/s

HSE uses two Ethernet transport protocols to send data over the network

100BASE-T: two pairs of high-quality twisted-pair wires

100BASE-F: fiber optic cables

In each case, the length of a twisted-pair segment may be up to 100 meters (328 feet). Possible to expand with repeaters

14



HSE/H1 bus system

linkingdevice

IEC 61158-2H1H1 IEC 61158-2

32 devices per segment

linkingdevice

H1H1

linking

device

H131.25 kBit/s

PC


15



H1 physical layer

defined by the IEC 61158-2 specifications.

up to 32 participants per segment (up to 10 for EEx-ia IIC applications)

remote power supply and communicationin 2-wire technology (EEx and standard)

fixed transmission rate of 31.25 kBit/s

Cable (twisted pairs line length up to 1900 m(EEx-ia up to 1000 m)

16



Manchester Bus Powered (MBP)

I

t

I B =10 mA

19 mA

1 mA

1 Bit

Bits: 1 0 1 1 0

1 Bit

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Communication layers ISO/OSI modelExample: User

Header TailData

10.7 / Good

100 0011 0011….

I

t

1 0 1 1 0

Parameter / FBRead / Write

Data transfer

Application Layer

Physical Layer

Data Link Layer

(MBP)Manchester Bus Powered

80/33 33 28 41

IEEE Bin

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Data volume

1 2 3 4 5

4 5

Value Status

5 byte

2 byte

Value Status

IEEE-754 Floating point

Discrete value

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Status information

BAD - The value is not useful.

UNCERTAIN - The quality of the value is less than normal, but the value still be useful.

Good - The value is useful

All Process Data has a Value and a Status

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Installation and commissioning

Field devices and components: Less cable (shorter stub lines)Fewer switching cabinets and control boxesParameterization from the control room

Decentralized Control System:Fewer components eliminates possibilities for errorsField device diagnostics supplies detailed causes of error and malfunction (error transparency)

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Main trunk EEx e,IEC 61158-2,31.25 kbit/s

Zone 2Zone 2

Zone 1Zone 1T

Fieldbus power supply

H1

Planning and design

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Maintenance and inspection

Reduction of plant stoppage times because:Detailed diagnostics data from the devices!Device exchange via Plug&playFunctionality uploads/downloads when device is exchangedNo dismantling of devices purely“on suspicion”Multivariable devices offer substitute values when a device fails

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Sedimenthas formedin the tank

Core elementsIntelligent field devices

Device development:MultivariableLong lastingLow-maintenanceDiagnostics (incl. operating agents)Maintenance messages

I need maintenancein 3 weeks- Instructions- Parts list

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Device identification

Each device also have a user-definable tag name.There are 32 characters available for assigning tag names to a

deviceThis tag name becomes a reference name for the Host system or

configuration tools

My name is:DP_sugar_plant_1

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Device identification

Who are you ?Tag name User level

Device ID Unique number

Bus address Low level (up to the system)

Example: DeltabarS / 452B481009- 7PY0185 / 25

How does the system know what kind of device is connected on the bus?

+

+

26



Construction of Device ID

( vendor number // device number // serial number )

FF device ID example: 452B481007- 7PY0155

H1

Manufactor ID - „Endress + Hauser“ 452B48Device Type - Cerabar 1007Serial number - 7PY0155

Every FF device has a specific device ID

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Function Block Class

field technician

maintenance

programmerFunction Block

Transducer Block

Resource Block

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Resource Block

This block contains data that is specific to the hardware and associated with the resource. The mode of the Resource Block controls the mode of all other blocks in the device.

Resource Block:device typemanufacturer software versionhardware versiondiagnosis...

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Transducer Block

Transducer blocks insulate function blocks from the specifications of I/O devices, such as sensors, actuators, and switches. Transducer blocks control access to I/O devices through a device independent interface defined for use by function blocks.

Transducer Block:levelflowpressureanalyticaltemperaturevalve positioner…

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Function Block

The Function Blocks are part of the Foundation Fieldbus specification and the key to the possibility of using control loops in the field.It in the responsibility of the device manufacturer, what kind of function block he wants to implement.

Function Block:analog inputanalog outputanalog inputanalog outputPIDsignal characterizer…

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Channel Selection

Transducerblock

Mass Flow

Density

Temperature

…

AI Block

1

2

3

nChannel = 3

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Path of signal in a fieldbus device

AI Block

Transducer

H1 FOUNDATION Fieldbus

mV

OUT

TransducerTransducer

Transducer

AI BlockAI Block

PID BlockPID Block

RS Block

Control

Measurem

ent

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Function Block and Control Strategy

FV-31

FI302

LD302

FE-31

88

S M A R

88

PCV

Flow

IP

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Data Traffic

FF

#1

PIDTemplate

PV2 PV1 CV SP

#3

#4

#2

FB

CVPID

PV2

PV1

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Data Traffic

FF

#1

PIDTemplate

PV2 PV1 CV SP

#3

#4

#2

FB

CVPID

PV2

PV1

AI FB

Published #1

FB

Published #2

AO FB

AO FB (PV2)

Published #3

FB PID

Published #4

AI FB

0 20 40 60 80 100 120 140 160 20

Macrocycle (ms)

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FOUNDATION Fieldbus conformance test

Conformance Test Kit (CTK)

Interoperability Test Kit (ITK)in Austin, Texas

CommunicationHardware

+Software Stack

Test of Communication

Complete device EDD file

+

Physical testLocal inn house

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Fieldbus Foundation Certification

Quality guarantee - independent of manufacturer:

Fieldbus Foundation has a qualified

certificate system for fieldbus devices

and therefore guarantees the

interoperability and interchangeability.

OK ?

Test in Test

Laboratory

Certificatefrom

Fieldbus Foundation Organisation

No

Yes

device to be checked including device description

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Foundation Fieldbus

It Is Much More than a Digital Communication Protocol!

www.fieldbus.org

The FOUNDATION Fieldbus Revolution from 4 to 20 … · The FOUNDATION Fieldbus Revolution -from 4 to 20 mA to Digital World 24th of August, 2007, Hotel Intercontinental - The Grand,

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