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Getting More from HART CommunicationsRon
HelsonHART Communication FoundationAustin, TX
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HART? Communication Protocol

• The Worldwide Standard for
• Smart Instrument Communication
• HART? is a registered trademark of the HART
  Communication Foundation

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Things You Probably Know About HART

• Most smart instruments use
  HART Communication
• HART smart field devices are
  used interchangeably with
  traditional analog only
  units
• Hand Held Communicators are often used to
  perform device set-up, calibration, commissioning
  and periodic maintenance functions
• PC-based instrument management tools can
  remotely communicate with HART devices to
  manage calibration and other instrument
  parameters from central locations (instrument
  shop or control room)
• HART Savings for Installation Maintenance

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Things You May Not Know About HART

• All HART smart devices generate considerable data
  of value to process operations 24/7
• HART provides access to all device
  data while the 4-20mA analog signal
  is being used for
  control
• Information about the status (health)
  of the field device and quality
  of the 4-20mA
  signal is transmitted with every message
• The Primary Variable is transmitted as a 4-20mA
  signal and also as digital value
• Many devices have other process variables
  (measured or calculated) in addition to the
  Primary Variable
• Using HART Data More Asset VALUE

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Getting More from Your HART Assets

• HART devices can provide much more VALUE!
• In most installations, communication with HART
  devices is occasional or infrequent at best
• Communication is typically through hand held
  communicators for initial commissioning and
  periodic maintenance
• This part-time communication provides real
  savings, but uses only a small portion of the
  capability available in HART devices
• Continuous communication allows YOU to get the
  full value from YOUR HART assets
• Continuous Communication More VALUE

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What You should know About HART Device Data

• 35-40 data items Standard in every HART device
• Device Status Diagnostic Alerts
• Process Variables Units
• Loop Current Range
• Basic Configuration Parameters
• Upper Lower Range Values
• Loop Test
• Force Loop Current to specific value
• Manufacturer Device Tag
• Standard commands for easy access

Lets look at the Easy-to-Use Data Items
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HART Device Data

• Data in HART devices is Valuable to more than
  just the Instrument Dept
• Data includes
• Process Variables
• Device Status Alerts
• Device Information
• Basic Calibration Information
• All Data is easily available to Your Plant
  Systems!

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Digital Process Variable Data

• Many HART devices are multi-variable and support
  more than one process measurement or calculated
  value
• Many Pressure Temperature devices
• Most Flow, Level Analytical devices
• All Valve Positioners / Controllers
• All Process Variable data includes
• IEEE Floating Point Value
• Standard Engineering Units Code
• Process Data Status
• Primary Variable is continuously transmitted on
  the 4-20mA loop
• HART gives You access to All Process Variables in
  the device

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Typical HART Process Variable Data
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Status Diagnostics

• HART smart field devices continuously self-assess
  and monitor their performance
• Device status information returned with every
  message
• Includes quality of 4-20mA signal and process
  variable data
• Using HART data increases control system
  integrity
• Get early warning of device problems
• Automatically track and detect changes
  in Range or Engineering Units
• Validate PV and Loop Current values at control
  system against those read from the device
• Now lets look at how to Use this Data

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Getting HART in Plant Systems

• Most control system suppliers offer some type of
  HART interface solution today
• Capability varies
• Several have HART-capable I/O
• Others working to improve
• Third party interfaces
• Multiplexers - Provides path for HART data to OPC
  Servers and PC-based configuration and diagnostic
  applications
• Gateways to plant networks - TCP/IP Ethernet,
  Modbus, Profibus, etc
• Loop Monitors - convert HART device data into
  4-20mA signals, contact closures or fault alarms

MMI Engineering Maintenance
Controller
HART DA T A
I/O
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Getting HART on Plant Networks

• OPC Server provides easy
  access to HART device
  data
  anywhere on plant network
• Allows several applications to
  access data in a HART device
  at the
  same time
• Provides popular MMI and
  Trending packages with access
  to data in
  HART devices
• Connect to one or thousands
  of devices using common
  HART I/O systems
  interfaces

HART SERVER TOOL
HART Device Data on Your Desktop Process
Variables, Range Values, Device Status
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Using HART in Control Systems

• Continuously Monitor
  Device Status Diagnostics
• Device Malfunction
• Loop Current Fixed
• Device Needs Maintenance
• Validate data between
  Device System
• Read Loop Current, PV and Range
  values from device
• Validate with system values
• Track changes in Upper/Lower Range values (20mA
  4mA points)
• Use capability of Multi-Variable devices
• Access 2nd, 3rd 4th Process Variables for
  operator display, trending, or control
  functions
• Get value from additional measurements,
  calculated values (totalizers),
  actual valve position, etc.

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Adding HART to Control Systems

• Some control systems have direct interface and
  support the use of HART process diagnostic data
  through-out
• Third party products support use with non-HART
  systems
• Multiplexer - Parallel with system I/O
• Several manufacturers
• Some integrally packaged with FTA
• Data access may be limited if one HART channel
  serves multiple devices
• Gateways - HART to Modbus, HART to Profibus and
  more to come...
• Tri-Loop - Converts secondary process variables
  into 4-20mA signals
• SPA - Converts secondary variables and device
  status alerts into contact closures

MMI Engineering Maintenance
Controller
I/O
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MultiVariable Interface for non-HART
Systems
FV-Differential Pressure TV-Static
Pressure SV-Temperature PV-Compensated Flow
4-20mA Signals

• Tri-Loop takes digital process variable values
  from HART and produces 4-20mA signal for each
  secondary variable

HART Burst Mode Command 3
One Wire from Field to Control Room Multiple
Analog Signals to Control System
HART MultiVariable Transmitter With process
variables for Compensated Flow, Differential
Pressure,Static Pressure, and Temperature
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Critical Loop Interface for non-HART
Systems
SPA gets process variable and device status data
via HART and generates additional 4-20mA signal
and/or contact closures for High/Low Alarm or
Instrument Fault
4-20mA Proportional to PV
HART Multivariable Device
HART Instrument Fault Alarm
Second Variable (SV) High/Low Alarm
Third Variable (TV) High/Low Alarm
Fourth Variable (FV) High/Low Alarm
4-20mA Proportional to SV, TV, or FV
One Wire from Field to Control Room Multiple
Analog Signals and Alarm Contacts in the Control
System
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HART Master (Host) Capabilities

• Master implementation rules are more flexible
  than field device rules
• Capabilities vary based on the application
• Example Field Calibrator does not provide
  same functionality
  as DCS
• Simple HART features not supported
  in all Masters
• HART Master Classifications

Class Description
0 Host does not meet the minimum requirements
of Conformance Class 1 1 The host can utilize
cyclical process data from any field device
2 The host can supply the user with basic
identification and configuration data from any
field device 3 The host can perform basic
configuration for any field device - Minimum
level for classification as Generic Host
4 The host provides basic commissioning and
calibration support for any device 5 The host
can access all data items and device specific
functions for any device
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Other Things You Should Know

• HART is Safe, Secure, and Available
• Tested and Accepted global standard
• Supported by all major instrumentation
  manufacturers
• Saves Time and Money
• Install and commission devices in fraction of the
  time
• Enhanced communications and diagnostics reduce
  maintenance downtime
• Low or no additional cost by many suppliers
• Improves Plant Operation and Product Quality
• Additional process variables and performance
  indicators
• Continuous device status for early detection of
  warnings and errors
• Digital capability ensures easy integration with
  plant networks
• Protects Your Asset Investments
• Compatible with existing instrumentation systems,
  equipment and people
• Allows benefits to be achieved incrementally
• No need to replace entire system
• HART High VALUE No RISK

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Summary

• You probably have HART devices in your plant
  today
• Now you know more about the valuable data they
  can provide
• Its easy to get the additional data and VALUE
  from Your HART devices - Risk Free!
• HART is the lowest cost solution for improving
  Plant Performance and supporting Asset Management
  initiatives

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What to Do?

• Identify your HART devices
• Provide HART capability training for your staff
• Talk with your systems supplier about access to
  your HART data and providing you with tools to
  better use the capability in your HART devices
• Use your assets to their fullest
  You probably are using only a small part of
  HART-ability
• Find Out More!

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Support for HART Technology

• Provides Worldwide Support for Application of the
  HART Protocol Technology
• Technology Owner and Standards Setting Body for
  the HART Protocol
• Independent Non-Profit Organization
• Funded by Membership and Training/Support
  service fees
• Any Company interested in Use of the HART
  Protocol should be a member

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Foundation Services

• Manage and control the HART Protocol
  Specifications
• Enhance the HART Technology
  as necessary to support industry
  needs for Smart Instrumentation
• Provide Training Workshops,
  Newsletters, Web Site and other
  Services to Educate Industry on
  use of the HART Protocol
• Manage Library of all Registered Device
  Descriptions

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The Bottom Line...

• Most Users and Suppliers do not use the full
  value of HART Communication
• Get More from HART Communications!
• The HCF is here to help YOU!

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Contact Information

• HART Communication Foundation
• 9390 Research Blvd., Suite I-350
• Austin, Texas 78759 USA
• Tel [phone]
• Fax [phone]
• e-mail hcfadmin_at_hartcomm.org
• www.hartcomm.org
• Thank You for Your Attention!