Everything You Need to Know About HART Communication Protocol

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Everything You Need to Know About HART
Communication Protocol

• By The Transmitter Shop Inc.

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Overview of HART Communication Protocol

• In Industrial Automation systems various types of
  Smart Field Devices are used. These smart devices
  help in monitoring every device installed in the
  factory. These devices also enable transmission
  of data between connected devices, both inside
  and outside of the factory. This data is used to
  streamline factory automation and process
  control.
• The data communication was accomplished through
  4-20 mA loop transmitters. The only drawback of
  this system is that it can only monitor one
  process variable at any time.
• This is where HART-enabled smart devices such
  as HART transmitters can make a difference.
  Today, HART protocol has become an industry
  standard for industrial automation.

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What is HART Technology?

• HART or Highway Addressable Remote Transducer was
  first introduced in 1980s.
• The HART Protocol facilitates digital data or
  signal transfer over analog wiring systems.
• More than 300 million devices across the world
  are powered by HART protocol
• HART protocol has become an industry standard for
  establishing communication between host systems
  and smart field devices. 
• the HART technology is a bi-directional
  communication protocol.

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Working Principle of HART Communication Protocol

• HART Technology is built on 202 Standards and
  works on frequent shift keying (FSK) principle.
• It is made of 2 Frequencies 12oo Hz and 2200 Hz
• The 1,200 Hz signal represents bit 1 and the
  2,200 Hz signal represents bit 0. 
• The HART protocol supports two communication
  channels at a time 4-20 mA analog signal and
  digital signals. The digital signals can be any
  information such as the operational status of the
  device, diagnostics, any measured value, and so
  on.

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Modes of HART Communication Protocol

• Point-to-Point In this type of configuration,
  the traditional signal is used to define one
  variable, while the other important process
  variables are communicated through digital
  signals over HART Protocol.
• Multidrop In this type only one slave device is
  used to broadcast a HART reply message. It uses
  only a pair of wires.

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Benefits of Using HART Protocol for Industrial
Automation

• Optimizes operational capabilities of device data
• It identifies the potential problems before they
  occur and minimizes the downtime due to equipment
  failure.
• Reduces device maintenance and inventory costs.
• Reduces wait times problem identification and
  resolution.
• Improves Safety Integrity Levels through advanced
  diagnostics.
• Automates record keeping.

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Conclusion

• Due to its increasing popularity, the protocol
  has been updated several times since the
  introduction.
• HART-enabled transmitters, especially HART
  pressure transmitters are widely used in various
  process industries for pressure measurement. The
  pressure transmitters are configured to HART
  communicator for achieving desired performance.
• Rosemount and Foxboro are two prominent brands
  offering HART pressure transmitters.

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Get in Touch with us

• Address 2531 Preston, Pasadena, TX 77503
• Toll Free 1-888-964-8837
• Local 281-487-3115
• Fax [phone]
• Email sales_at_transmittershop.com
• Website https//www.transmittershop.com/