NDLI: Fieldbus: more than a communication link

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Fieldbus: more than a communication link

Content Provider	IEEE Xplore Digital Library
Author	Pinceti, P.
Copyright Year	1998
Description	A virtual instrument alone is nonsensical. Measuring a voltage or a current with a multi-meter is much simpler, faster, and cheaper than using a virtual measurement environment. A dedicated instrument can perform more accurate and reliable measures than any virtual instrument. On the other hand, if a measurement is a combination of different data, if it has to be mathematically manipulated, or transmitted, or recorded, or displayed...for these situations, virtual instruments prove their worth. The concept can extend to virtual controllers. A hardware controller can easily implement a single PID control loop, but virtual devices are much more flexible in implementing multiple control strategies. Virtual devices give the best results when solving complex measurement and control tasks. Let's define the meaning of the two words that comprise virtual system. A system has specific characteristics: 1) integration of multiple actuators and sensors; 2) flexibility in defining the measurement or control target; 3) integration of different subsystems; 4) capacity of performing multiple tasks; and 5) interface with other systems. To summarize, when we speak of a virtual instrument, what we actually mean is "an instrument based on digital technology" that is a hardware platform, an operating system, and a development environment. In a sense, it may be preferable to speak of "intelligent systems" rather than of virtual systems. In the I&M world, the terms "intelligent" and "virtual" can roughly be considered synonyms. An instrument is intelligent if its human designer is intelligent. Innovation rests with the capacity of transforming physical principles into reliable field devices. The virtual instrument defined in the fieldbus profile is a representation that is necessary for interfacing the instrument with the data acquisition or control system, but it has nothing to do with the instrument itself. Through fieldbus it is possible to create a really distributed virtual measurement system. The instrument interface is virtual (digital and programmable), but the instrument itself is all but virtual.
Starting Page	17
Ending Page	23
Page Count	7
File Size	1190403
File Format	PDF
ISSN	10946969
Volume Number	7
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Field buses Instruments Current measurement Performance evaluation Hardware Control systems Voltage measurement Three-term control Actuators Capacitive sensors
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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