Download 13 (137KB) - Fieldbus Foundation

1 

Fieldbus Foundation – India Marketing Committee 

Fieldbus Foundation 

Paradigm Change in Instrumentation Technology 

FF Software / Hardware device integration 

Date : 26 th of September, 2008 (Friday) 

Time : from 09:00 am to 06:00 pm. 

Venue : Automation 2008 Conference Hall. 

: Conference Hall, Bombay Exhibition Centre (NSE), 

Goregaon (East), Mumbai INDIA 

2008 FFIMC - Automation 2008-Mumbai 

Lars Mickan 

Softing AG 

© 2008 Fieldbus Foundation

2 

Structure 

- Introduction – Motivation 

- Requirements on Field Devices Integration 

- Hardware Solutions for FF Interface 

- Software Solution MODBUS/HART mapping 

- Ready-made Example of FF Interface 

- Summary 



3 

Structure 






- Summary 



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Introduction – Motivation 

- Foundation Fieldbus Technology is a 

Standard in Process Automation 

- Still other „old“ fashion technology's 

(4..20mA or HART) available in the market 

- How will it possible to use current field 

device hardware with advantages of FF ? 



5 

Structure 






- Summary 



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Requirements on Field Devices Integration 

- Hardware development of FF interface 

- Adaptation of communication stack to new 

hardware 

- Integration of application software 

- Electrical conformance test (EMC, Ex, 

Physical layer) 

- CTK, ITK and host conformance tests 



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Project Schedule –„Traditional way“ 

today 

4-6 months 

6-9 months 

App. 

12 months 

Step 1: 

License hardware schematics 

and develop fieldbus Interface hardware 

including ex requirements 

Step 2: 

Produce Prototypes and submit them to stack 

supplier 

Stack supplier implements stack and function 

blocks 

Step 3: 

Integration of device application and 

connection to device 

Pre-certification 

Step 4: 

Final tests and product launch 

Certification 



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Required Test of new Fieldbus Hardware 

� Physical Layer Test 

- Test of fieldbus hardware based on requirements of physical layer of 

Foundation fieldbus 

- A successful test is necessary to get a device certification 

� CTK Conformance Test 

- Based on FOUNDATION fieldbus conformance test kit 

- Will be done by test lab of Frauenhofer ITB in Karlsruhe 

� ITK Interoperability Test 

- Test of interoperability to other FOUNDATION fieldbus devices 

- Will be done by test lab of FOUNDATION fieldbus in Austin 

� Proven application with to major host systems 



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Project Schedule –„Rapid way“ 

Today: Step 1: 

1-2. month Step 2: 

3-4. month Step 3: 

Submit specification of service 

application (e.g. HART-Commands) 

Hardware integration 

Customizing of software and templates 

Configuration files generation 

Precertification (only ITK necessary) 

Delivery 

Certification to follow 



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Comparison of different Approaches 

Traditional 

Approach 

Raprid 

Approach 

Development 

Cost 

-- 

+ 

Development 

Time 

-- 

++ 


System 

Performance 

+ 

+ 

Device Cost 

+ 

- 


11 

Structure 






- Summary 



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FF Interface Solution - Scenario #1 

„Traditional“ way of Field Device Integration 

Existing New Field Device 

- One Processor System 

Sensor / 

HART 

- Design of new PCB (Schematics) 

Actuator 

Interface 

Board 

- Re-run of all certification test 


Sensor / Actuator 

and FF Module 

one board – one 

processor 


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„Rapid“ way of Field Device Integration by using serial interface 

Existing New Field Device 

- Using of Actor / Sensor board 

Sensor / / 

HART 

- Serial communication 

Actuator 

Interface MODBUS RTU 

Board 

- Only ITK Board certification test necessary 


FF 

Interface 

Module 


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„Rapid“ way of Field Device Integration by using HART interface 

New Existing Field Field Device Device 

- Using of Actor / Sensor board 

Sensor Sensor / / HART HART 

- Mapping Actuator Actuator of HART Interface commands Interface to FF 

Board Board 

- Only ITK certification test necessary 


FF Interface 

Module 


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Summary of the Scenarios 

Scenario #1 

Traditional way 

Scenario #2 

Rapid way 

Serial Interface 

Scenario #3 

Rapid way 

HART Interface 

Development 

Cost 

-- 

- 

+ 

Development 

Time 

-- 

+ 

++ 


System 

Performance 

+ 

+ 

- 

Device Cost 

++ 

- 

- 


16 

Structure 






- Summary 



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FF Interface Solution – MODBUS/HART 

The FF interface module has to have a built in 

MODBUS rsp. HART Master-Slave communication 

module 

Modbus / HART handling supports the following 

communication strategies: 

- cyclic read, cyclic write 

- acyclic read, acyclic write 

To do: 

- Define Modbus locations / HART commands 

- Define access pattern (cyclic / regular / acyclic) for 

transactions 



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FF Interface Solution – MODBUS/HART 

Acyclic command Cyclic commands Regular commands 

write parameter C 

Request List 

read process value read parameter A 

Modbus / HART 

Scheduler 

read process value 

read parameter A 


read parameter B 


write parameter C 


read parameter B 

read parameter D 


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Structure 






- Summary 



X1 

User 

Interface 

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FF Interface Solution – Block Diagram 

M16C 

Progamming 

Interface 

Serial Interface 

3.15V 

Power Output 

6.3V 

Power Output 

configurable IO 

DI/DO/AI/AO 

Jumper 

I2C memory 

interface 

MAU 

Medium 

Attachment Unit 

Digital Unit 

Micro Controller 

M16C 

Fieldbus Controller 

UFC100 


Protection 

FBK 

X2 

Fieldbus 

IEC61158-2 H1 

Fieldbus Foundation 


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Low Power Design – Intrinsic safety 

- FOUNDATION fieldbus is able to provide power 

over bus 

- 2- or 4-wire designs are possible 

- The available bus power depends on different 

conditions (devices, cable, …) 

- Lower total power consumption: 

� Less development efforts regarding intrinsic safe 

� Less effort for bus or power cabling 

� Less hardware cost (cheaper components, design without 

galvanic isolation) 



22 

Fieldbus Kit FBK2 - Example of FF Interface 

- Easy FF integration of existing field devices 

with HART- or serial interface 

- Compact size makes it ideally suited for 

installation in most existing device housings 

- Pre-certified for hazardous areas 

(ATEX certificate) 

- Connection to field device via: 

UART, I²C or SPI 

- Programmable AI/AO and DI/DO 

- Ready-made templates allow quick 

customization to HART commands 



23 

Structure 






- Summary 



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Summary 

- Any traditional field devices can become a 

FF field device 

- A ready-made FF interface can reduce the 

development and test efforts 

- Software adaptation for device specific 

commands will be still necessary 

- Pre-Certified FF interface hardware is 

available 



25 

Thank You for Your Attention!

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