5 essential factors to consider when implementing …12274]_5... · 5 essential factors to consider...

5 ESSENTIAL FACTORS TO CONSIDER WHEN IMPLEMENTING PROFIBUS/PROFINET

Paul ChappleTechnical ManagerMurrelektronik Ltd

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Paul Chapple / 5 Essential Factors…

5 ESSENTIAL FACTORS

IO types & Locations

Environment

Topology and Cabling

Reaction / Cycle Times

System Life-cycle

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1. IO TYPES & LOCATIONS

Visually ‘Scan’ the installationLook for IO points, not modules

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1. IO TYPES & LOCATIONS

Group IO/Devices and Layout systemPLC / ControllerAnalogue / Digital IOMotors / Drives / HMI

Choose Profibus/Profinet slaves to suit your machine architecture

Panel mount / field mountWired / pluggable

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INFEED TABLE HEAD OUTFEED

CONTROL PANEL

28 DI

16 DO

1 valve island

2 motor

32 DI

32 DO

2 RTD

1 motor

24 DI

8 DO

4 AI (U)

2 TH K

28 DI

16 DO

1 valve island

2 motor

32DI 32DO


2. ENVIRONMENT

Ambient temperatureMost industrial products ~ 0 to 55oC

Don’t forget conducted heat

HumidityChemicals / fluids (water, acid, oil, salt, cleaning agents)Explosive atmosphere (ATEX)Wash-down requirements

IP65 – hose pipe

IP67 – water proof

IP68 – more than IP67

IP69K – F&B wash-down

Shock & VibrationNoise/Interference

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Most Profibus / Profinet problems are physical!

Consider suitable housing / connector styles

Profibus-DP Line (and Star Topology)

Profinet Star (and Line Topology)

3. TOPOLOGY / CABLING6


Repeater

SwitchSwitch

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Best installation practices

Segregate bus / power

Use good quality cable

Pre-made connectors

Quality self-wire connectors

Equipotential Bonding

Cable Shielding

3. TOPOLOGY / CABLING7


4. REACTION / CYCLE TIMES

How fast is fast enough? 12Mb/s, 100Mb/s, … …

System cycle time typically made up of :-Controller CPU scan time 10-100ms

Real time Network 1-20ms

IO Device 1-10ms

IO <1ms

Plant reaction time variable

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RT ~ 5-20msPaul Chapple / 5 Essential Factors…

4. REACTION / CYCLE TIMES

Understand application limitations, e.g. :-High node countsLong Profibus/net cablesProcess demands

Improve reaction times by:-Using high quality network cablesBest installation practices

Cable routes

Equipotential grounding / bonding

Pre-moulded cables

Reducing size/split networkIncreasing Profibus speedNetwork analysis / health check

Understand what your process actually requires, or risk adding unnecessary cost.

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5. SYSTEM LIFE-CYCLE10

Reduced cabling

Fewer terminations

Expandable

Diagnostics

Pluggable

Pre-tested

Pluggable

IO Diagnostics

Bus diagnostics

Fewer failure points


5. SYSTEM LIFE-CYCLE

What is critical to you?Material costTime to installTime to testTime to reinstall/commission on-siteReliabilityMaintainabilityFuture-proofAll of the above

Profibus / profinet designed for your applications

Open vendor competition / securityPluggable reduces wiring / reinstallDiagnostics speed up testing / commissioningReliability Longevity & experience

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5. SYSTEM LIFE-CYCLE

Who will maintain the system?Service contract / warrantyLocal engineers

Where is the system?UK / global

Cost of down-timeReputation for reliability

Profibus/Profinet advanced diagnosticsNetwork statusSlave statusPlant statusVisualisation‘What-If’ – e.g. a sensor short-circuits

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Information in the hands of those that need it – operators/maintenance


Application Focused Product

Profibus Installed nodes > 45 millionProfinet installed nodes > 4 million

Profibus products > 2,500Profinet products > 600

Wide range of product functionality / package style / suppliers, all tested / certified for interoperability

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Training for network members

Training is available in a range of areas to upgrade your skills including:

Certified PROFIBUS Engineer – combining installation, commissioning and

engineering

PROFIBUS System Design Course

Certified PROFINET Engineer – combining installation, commissioning and

engineering

PROFINET Developer Course

Training can be undertaken at the PROFIBUS International Competence Centre in Manchester, on your company premises or at an off-site location of your choice

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Training for network members

PROFIBUS and PROFINET training is offered through:

PROFIBUS International Competence Centre

- Manchester Metropolitan University in Manchester

or a location of your choice

(http://www.sci-eng.mmu.ac.uk/ascent/)

PROFIBUS on-site training is offered through:

PROFIBUS International Training Centre

- Verwer Training & Consultancy Ltd

(http://verwertraining.com/)

Our training partners

5 essential factors to consider when implementing …12274]_5... · 5 essential factors to consider...

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