Analyzer Connectivity Options

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Analyzer Connectivity Options

• By David Bergeron, P.E.
• TECO -
• Thompson Equipment Company

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Topics

• Platforms/Operating Systems
• HMI/HSI
• Fieldbus (Analyzer Level)
• OPC (Application Level)
• Overall (Plant Level)

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Windows 2000

• The next version of Windows NT
• High level, secure operation system well suited
  for large mission critical applications
• -Web Server
• -Data Server (Real Time,Historical,Alarms)
• Used as data server and client for Operator
  workstations and data servers (Data Access
  Server, Historical Data Logging, and Alarm
  Server, etc)

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Windows CE

• Small, Modular, embedded platform
• Allows full integration of devices with plant IT
  infrastructure
• Real-Time support
• Boots from flash disk (Diskless Operation)
• Network support
• Currently used in a wide range of devices

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Human System/Machine Interface

• Provides the interface to your instrumentation
  data on your computer
• Graphics
• Alarms
• Trends
• Reports
• Security
• HMI software is available for Windows CE through
  Windows 2000
• Support the OPC data access specification as well
  as other OPC specs
• Support Ethernet and TCP/IP and DCOM
• Supports thin clients

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Introduction to Fieldbus

• Fieldbus History
• What is Fieldbus?
• Some advantages of Fieldbus
• Fieldbus Foundation

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Field instrument communication development
Fieldbus
4 ... 20 mA
A
Conventional1965
4 ... 20 mA superimposed,digital Communication
A
HART1987
IBIS
FSK-Modem
A
Fieldbus1985/95/97

• digital Communication via
• PROFIBUS (Process Fieldbus)FF (Foundation
  Fieldbus)and various others

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What fieldbus is ?
Fieldbus

• ... an all-digital, bi-directional communication
  network for field instruments/Analyzers
• Fieldbus technology provides continuous
  monitoring of Multi-Variable-Field instruments in
  the DCS-System as the diagnostic of the
  instruments
• Multi-Variable-Field instruments, e.g.-
  T-Transmitter T-Value in E.U. and status
  signals, ...- P-Transmitter P-Value in E.U. and
  status signals, ...- F-Transmitter F-Value and
  Quantity-Value and status signals, ...-
  E-Transmitter Current and Voltage and Active
  power and Frequency, ...- Positioner / Actuator
  Positioning setpoint and Positioning feedback
  and End position alarm and Service on-demand
  status, ...
• Multi-drop connection of field instruments
  (mA-Supply and Data communication)
• Real-time performance for control loops and alarm
  acquisition possible !
• The distributed intelligence in the field can now
  really used with the Fieldbus
• Fieldbus even allows control at the device level.

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Fieldbus Foundation

• Non-Profit Organization made up of over 100
  Control and Automation Products
• Mission to create an "open," interoperable
  fieldbus standard that is based on the
  International Standards Organization's Open
  System Interconnect (OSI/ISO) seven-layer
  communications model.

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OPC (Object Linking and Embedding for Process
Control)

• The Problem that provided the motivation
• OPC Foundation
• OPC Foundation Charter
• What is OPC?
• OPC Specifications
• Data Access Standard
• Alarm/Events Standard
• Historical Data Access

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What is OPC?

• OPC consists of a standard set of interfaces,
  properties, and methods for use in
  process-control and manufacturing-automation
  applications. The Active X/COM technologies
  define how individual software components can
  interact and share data. OPC provides a common
  interface for communicating with diverse
  process-control devices, regardless of the
  controlling software or devices in the process.

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Why is OPC Data Access needed?
From OPC Foundation by Al Chisholm, Intellution
Display Application
Trend Application
Report Application
Software Driver
Software Driver
Software Driver
Software Driver
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How does OPC Solve the Problem?
From OPC Foundation by Al Chisholm, Intellution
HMI Graphics Application
HMI Trend Application
Report Application
OPC
OPC
OPC
OPC
OPC
OPC
OPC
Software Driver
Software Driver
Software Driver
Software Driver
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OPC Foundation

• Formed in mid 90s
• Made up of over 220 member companies around the
  world
• Represented by Hardware and Software Vendors
• Has full cooperation and backing of Microsoft

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OPC Foundation Charter

• To develop an open and interoperable interface
  standard, based upon the functional requirements
  of Microsoft COM, DCOM and Active X technology,
  that fosters greater interoperability between
  automation/control applications, field
  systems/devices, and business/office
  applications.  

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OPC Specifications

• Data Access
• Defines interface standards for real-time data
• Alarm/Events
• Defines interface standards for Alarms Events
• Historical Data Access
• Defines interface standards for Historical Data

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Architecture Example
Engineers Workstation OPC Client
Operator Station OPC Client
OPC DA Server
OPC HDA Server
OPC AE Server
Ethernet
Serial Link
Wireless Ethernet
OPC
Analyzer
Analyzer
Analyzer
Windows CE
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Future Trends

• Wireless Ethernet
• XML (Extensible Markup Language)
• Web Browsers for client data access
• Web servers embedded in devices
• Device access and configuration using small palm
  based devices

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Analyzer Connectivity Options

• Fieldbus
• OPC
• XML

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The End

• Questions?