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HART

HART Monitors Extract Data from Smart Instruments - Simple Modules Expand Transmitter Usefulness - Greg Feliks - The HART digital signal often contains additional process measurements and other variables that may include instrument status, diagnostic data, alarms, calibration values and commands. In many cases, HART instruments were installed simply because they could be configured and diagnosed easily with a handheld HART communicator device. For a variety of reasons, the rest of the HART data often goes unused. One reason is because of the prohibitive cost of installing a plant-wide HART monitoring system. Another reason is the lack of familiarity with alternatives. A simple and cost effective solution for gathering HART information is to use a HART interface device only in the specific instances where it is needed most. Fortunately, HART interface devices, available from several manufacturers, make acquiring HART data a fairly simple proposition. This HART data is then made available to the control system via analog signals, discrete outputs or serial communications. From our valued sponsor Moore Industries-Pacific, Inc.

HART Communications- An excellent 40 page  technical paper from our valued sponsor Samson Controls

HART v Foundation Fieldbus – The Facts and the Real Difference -Jim Russell - Thanks to ICEweb
The question is often asked “Why should I install Foundation Fieldbus™ when the features are all available with HART?” This White paper addresses this question, provides some of the answers and covers the following;
- The Technologies
- Differences, Advantages and Disadvantages
- Why some Manufacturers / Suppliers continue to push HART and put up a “Smokescreen”
- Brownfield and Greenfield Plants- What technology should be used
-Simple HART v FF Comparison Chart

HART-An older (but still good) technology which was originally developed by Fisher Rosemount.

What is HART? - A technical paper from our sponsor MTL Australia

HART Protocol-A Solution Enabling Technology-By Ronald B Helson of the HART Communication Foundation - this is a good overview 

HART- An Introduction

Romilly's HART® and Fieldbus Web Site -This web site specialises in the digital communication protocols used in industrial automation, with special attention to HART.