siemens applied automation process gas chromatography siemens update ro nessi / cpac.pptslide 1;...

Siemens Applied Automation

Process Gas Chromatography

Siemens Update ro NeSSI / CPAC.ppt Slide 1; CPAC; November 2006

NeSSI Update

An Implementation of the Generation 2 BusSiemens Activities

November 2006




Topics

Summary Siemens activities

Review of key bus requirements

Current status of Siemens implementation




Summary of Siemens Activities

Siemens is implementing a large analyzer system project

Owner has requested NeSSI Generation 2 sampling systems

Siemens is proposing an implementation► Compliant with project time frame

► Based on available technology but consistent with long term NeSSI vision

► Cooperative with major substrate and component suppliers




Smart modular process sample conditioning implementation through the cooperation of:

• Siemens• CIRCOR Instrumentation Technologies• Parker Hannifin• Swagelok

VTP

A

Siemens Maxum edition II GC with integrated NeSSI Generation 2 Bus Control capability.

Sampling systems built with substrates and smart, Generation 2- compatible

components.

Intrinsically safe, Generation 2 Bus

I.S. Power Supply

Initial Implementation“Smart” analyzers

SAM functionality is integral to the analyzer




VTP

A

Continuous Gas Analyzers with system control and network integration provided by Siemens Network Access Unit (NAU) with integrated NeSSI Generation 2 Bus Control capability.

Sampling systems built with substrates and smart, Generation 2- compatible

components.

Intrinsically safe, Generation 2 Bus

I.S. Power Supply

Initial Implementation“Dumb” analyzers

SAM functionality is external to the analyzer




Review of Key Generation 2 RequirementsPieces Of the NeSSI Idea

New mechanical components► Modular

► Standardized mounting platform

► Interchangeable function

New electrical interconnection► Serial connection – plug in

► Intrinsically safe

► Self-identifying components

New smart design features (SAM)► Helpful HMI

► Programmability

► Standardized, transportable user programming

Complete;Available from a variety of suppliers.

Lots of discussion. Various standards considered; none adopted.

Various implementations are possible.




Key Bus Physical / Functional Requirements

Analyzer

Note:** Often, sampling systems are mounted separately from related analyzer.** Some systems mounted attached to analyzer.

Analyzer

SamplingSystem

Analyzer

SamplingSystem

Analyzer

SamplingSystem

Analyzer House (typical)

Local Power and Air

1. Analyzer may be up to 10m from sampling system. Total cable length <=20m

2. Number of bus “instances” to be limited to simplify analyzer control and reduce cost; <= 2 instances preferred, excluding power sources

3. Bus to support very large number of participating component and analyzer suppliers (unlimited ~ >1000’s)

4. Bus to provide for sensing and control of: valves, pressure, flow, temperature

5. Component power to be supplied via bus (rather than separate power bus) to simplify I.S. and physical issues




Key Bus Physical / Functional Requirements(Continued)

6. Components to be mounted in Division 1 / Zone 1 hazardous area.

7. Bus to be intrinsically safe and to support components mounted in hazardous area

8. Design goal for flammability ignition temperature to be T4 (135°C) with minimum at least T3 (200°C).

9. Component ambient temperature to be >=70°C10. Sampling system to be capable of supporting at least

30 separate streams11. Bus to support at least 200 component / functional

instances12. Bus to support component types in any combination up

to the total number of components in the system.13. Bus to support at least 4 simultaneously active valves14. Bus to supply necessary component power

management functions15. Bus to support replacement of components while live

without interruption of bus operation16. Bus to provide for control of high-power components

that do not draw power from the bus itself (eg. heaters)

Note: Requirements listed in no particular order.

Mounting area may be

hazardous or not.

Interior of cabinet is considered hazardous due to leakage of flammable gases in a closed area.




Key Bus RequirementsFunctions Defined by Bus

Analyzer

SAM

External communications

“SAM” may be either a physical device or a software implementation in the analyzer.

Bus must provide a method for analyzers to get “on” the bus.

Bus must provide a method for components connect “to” the bus…

Method of human interface for SAM.

VTP

A




Status of Siemens ImplementationOverview

I.S. Power Supply(ies)

As needed…

Mechanical component

Component interface electronics (by component manufacturer)

Substrate

Media Access Controller Chip (chip spec and burn image by Siemens; assembly by component manufacturer)

Intrinsically Safe NeSSI Generation 2 Bus

Bus buffer and I.S. barrier

Existing I/O Link with proprietary protocol

Siemens GC




Status of Siemens Implementation Analyzer and software

► Communications Software / Protocol: existing proprietary, complete

External bus► Buffer / drivers and I.S. barriers: in test► I.S. certification: preliminary review complete► EMI / RFI testing: bus validation proven; components pending► Robustness, bit error rate testing: bus validation proven; components pending

Components► Media Access Controller chip: Version 1 operating in test► Component interface and software: in test► I.S. certification: pending► Component functions: in test

Field Schedule► Live demonstration at engineering facility: November 2006► Planned field delivery: 2007

Compatibility with NeSSI Vision► Direct implementation of NeSSI concept; meets all key requirements► Architecture consistent with other Bus technologies currently being considered

(CAN, Fieldbus, Profibus)

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