Fieldbus Technology Presenter: Todd Shadle [email protected] Lead Product Marketing Specialist...

FieldbusTechnology

Presenter:

Todd Shadle

[email protected]

Lead Product Marketing Specialist

Serial / Process Fieldbus

Outline

1) What is ‘process’2) Fieldbus Overview3) Layout of Fieldbus Networks

1) General layout2) Hazardous locations / I.S.

4) Definition of Fieldbus and Technology5) Components

1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments

Factory Automation / Process Automation

• Factory Automation– Making things – solids– Factory functions

• Machine Control

• Material Handling

– More discrete signals than analog

• Process Automation– Batch / Continuous – fluids– Pipes, Tanks, Valves, Pumps– Process functions

• Flow rates

• Pressure

• Temperature

• Levels

– More analog than discrete– Challenges

• Explosive

• Possibility of spills (environmental concerns)

• Toxic / Corrosive

Outline

1) What is ‘process’2) Fieldbus Overview3) Layout of FF network


4) Definition of FF and Technology5) Components


Market Distribution

ARC Definition of Fieldbusvs. Device Networks

Process Control

Logic Control

Simple Devices Complex Devices

Bit Byte Block

Type of Devices

Type of Control

MessageType

Devicebus

Sensorbus

Fieldbus

We Will Continue to Live in a Multi-Protocol World

Process Automation

Fieldbus & Device Network Applicability

DiscreteDiscrete

AS

I

Inte

rbu

s

Seri

ple

x

Pro

fib

us D

P

Pro

fib

us

FM

S

CA

N CC

Lin

k

Con

trolN

et

ProcessProcess

Devic

eN

et

SD

S

Worl

dFIP

Lon

Work

s

FF H

1FF H

SE

H2

ATM

/

FD

DI

HA

RT

Pro

fib

us P

A

Eth

ern

et

BusinesBusinesss

ControlControl

DeviceDevice

Bit-level Bit-level SensorSensor I

Loop

Growth – Global Shipments

Fieldbus Benefits

• Open Automation Infrastructure• Greatly Improved Asset Management• Reduced Wiring Costs ???• Reduced Process Variability (digital vs analog)• Increased Capacity Utilization• Reduced Maintenance Costs• Reduced Commissioning – auto detection• Reduced Spare Parts Inventory (trending data)• Improved Safety & Regulatory Compliance


1) General layouts2) Hazardous locations / I.S.



Outline

12 | Process Fieldbus | Vogt | Interface | 04/10/23

FF powersupply / conditioner

Transient suppressor

Host with FF cards

Control Cabinet

General Layout – FF H1 Segment

Bulk powersupply

“SEGMENT”

“TRUNK”“SPURS”

Field

long distance (up to 1900m total) FF devices

Terminator

Additional SEGMENTS

Terminator

Foundation Fieldbus

Field

FF devices

T

Segment protectors

T

Redundant with diode and backup UPS

Emerson Yokogawa Honeywell Siemens Smar Invensys ABB

Devices per segment

• <32 protocol supported

• <16 host supported

• 8-12 installed reality


PLC

General Layout

“TRUNK”

Field

long distance (up to 1900m total)

T

Profibus PA

DP/PA Coupler

DP/PA Link

Terminator

“SEGMENT”

DP

“SPURS”

FF devices

Terminator

FF devices

T

Outline





Safe AreaGeneral Purpose

Class 1 Div 2Zone 2

Control Cabinet

FNICO

Control Cabinet

Class I, Div.1Zone 1,0

FISCO

Ex – Traditional Solution

Entity

Safe areaGeneral purpose

NI Cond. / Barrier

PowerPowerSupplySupply

Junction Box / Segment Protector




Centralized - NI and IS protection done in the

control cabinet

Fieldbus Nonincendive Concept

Fieldbus Intrinsically Safe Concept

Classical Calculations

IS Cond. / Barrier

IS Cond. / Barrier

Voltage and Current limited to the field

Low Power

Lower Power

Lowest Power

Class I, Div.2Zone 2


Control Cabinet

Zone 1

Ex – High Power Trunk

Safe areaGeneral purpose



Distributed - NI and IS protection done in the

field


NI Barrier NI Barrier

IS Barrier

IS Barrier

Energy limiting PER SPUR



Junction Box / Segment ProtectorHigher V = longer cable runs

Higher I = maximum # number of instruments per segment, even for IS



Safe AreaGeneral Purpose

Class 1 Div 2Zone 2

Class 1 Div 1Zone 1Zone 0

Control Cabinet


Intrinsic Safety Isolators



1) General layouts2) Hazardous locations / I.S.

4) Definition of Fieldbus and Technology5) Components


Outline

Technical Basics of Foundation Fieldbus

• Bi-directional digital communications protocol used for communication between Foundation Fieldbus devices and the control system

• Digital communications and DC-powered network– Increases data to the user for diagnostics and asset management– Consolidates wiring versus standard point-to-point– Provides power and communications over a single shielded twisted pair

• FF is more than communications – control in the field via function blocks

• Manchester Bi-phase L encoding• Data rate of 31.25 kbps (H1 layer)• Pass token• Devices/Instruments…

– Will work between 9 – 32Vdc• 10mA – 20mA avg.

– Transmit using current signaling– Receive using voltage signaling

30mA10mA

Current – Voltage Signaling

24VDCPowerand

Conditioner

FF Device100 Ω

1µF

100 Ω

1µF

20mA

20mA5mA5mA

+

_

+

_+

_

+

_

5mA5mA

24

24.5

23.5

Cheap-O-scope

Outline





• Junction module provides a ‘star’ connection for end instruments to connect to the bus.

• Short circuit protection prevents an instrument failure from disrupting the entire segment.

FIELDBUS SEGMENT PROTECTORS



Host with FF cards

Control Cabinet


Bulk powersupply

T

Field

FF devices

T

Terminator

Device Fault Short Circuit

Terminator



Host with FF cards

Control Cabinet


Bulk powersupply

Field

FF devices

T

Terminator T

Terminator131 mA

56 mA

6 devices at 15 mA each Segment protector

circuitry limits short

90 mA

Device Fault Example

15 mA

• Short circuit protection: 15-60mA, fixed / switchable• 2,4,6,8,10,12-spur versions• A device can be removed without disrupting communication• Terminator: built-in, switchable, external, or automatic• LED indication of status• Access points for handheld communicators• Entire approvals range available in most cases… Zone 0-1-2,

Div 1-2• Compatible with FISCO, FNICO, or Entity• Pluggable screw terminals• IP20 DIN mount and IP67 with enclosure options

Device Couplers

• Trunk Module– Power from the trunk to TBus– Limits trunk voltage (9..32V)– Low voltage warning < 12V– User configurable shield– External terminator (-ET)

installed in trunk-Out terminal

Device Couplers

• 2-Spur Module– Two nonincendive spur outputs– Ease of wiring in enclosure – Four discrete current-limiting

setpoints

New Couplers

Outline





• FF Power supplies are used to provide power to each segment while allowing for isolation between segments.

• An integrated filter prevents the power supply from eliminating, or sinking, the superimposed data on the network.

FOUNDATION FIELDBUS POWER SUPPLIES

Fieldbus Power Supplies

• Single channel isolated and multi channel redundant versions

• 1,2,4,8-segment variations• Alarm contact for indication of failures• Advanced bus diagnostics• Built-in terminators• Input 18-30Vdc• Output 14-30Vdc @ 350-1A load• Non isolated versions also available (“power conditioner”) FF-831

Outline





Fieldbus Cable Types vs. Max. Length

Type “A” is Preferred cable type according to IEC/ISA standard for new

installationsSource: Foundation Fieldbus Wiring and Application Guideline

Recommended Maximum Spur Length, m(ft)

Cable Connections

• Typical Connections are discrete to terminal blocks• Some manufacturers offer over molded 7/8” connectors• Most Instrument manufacturers offer discrete and 7/8”

connections

Foundation Fieldbus Cables and Connectors





Outline

Major Suppliers & FF-Compatible Products

ABB InvensysControl Systems Control SystemsMagmeters Pressure TransmitterPressure Transmitter Temperature TransmitterVortex/Swirl Meters Vortex FlowmeterMass Flowmeter

Emerson Process Solutions HoneywellControl Systems Control SystemsDigital Valve Controller Pressure TransmitterFloVue Final Control System Temperature TransmitterPressure TransmitterTemperature Transmitter YokogawaValve Positioner Control SystemsVortex Flowmeters Analytical EquipmentMagmeters Valve PositionerAnalytical Equipment Temperature TransmitterCoriolis Flowmeters Vortex Flowmeter

Pressure Transmitter

Thank you for the Opportunity

Fieldbus Technology Presenter: Todd Shadle [email protected] Lead Product Marketing Specialist...

Documents

Transcript of Fieldbus Technology Presenter: Todd Shadle [email protected] Lead Product Marketing Specialist...