Interested to Buy Any Domain ? << Click Here >> for more details...
what is hart communicater? can u give brief explanation
about this issue?
- 3 Answers
- 8635 Views
- I also Faced
- E-Mail Answers
Answer Posted / manohar chotrani
HART® Field Communications Protocol is widely recognized as
the industry standard for digitally enhanced 4-20 mA smart
instrument communication. The HART protocol provides a
uniquely backward compatible solution for smart instrument
communication as both 4- 20 mA analog and digital
communication signals are transmitted simultaneously on the
same wiring. HART provides many benefits promised by
fieldbus, while retaining the compatibility and familiarity
of existing 4-20 mA systems.
Analog + Digital Communication
For many years, the field communication standard used by
process automation equipment has been a milliampere (mA)
analog current signal. In most applications the milli
ampere signal varies within a range of 4-20 mA in
proportion to the process variable being represented.
Virtually all installed plant instrumentation systems use
this international standard to communicate process variable
information.Simultaneous Analog + Digital Communication
HART uses Frequency Shift Keying to encode digital
information on top of the 4-20 mA analog signal
HART Field Communications Protocol extends the 4-20 mA
standard to enhance communication with intelligent
measurement and control instrumentation. A major step in
the evolution of process control, the HART protocol is
fostering significant innovation in process instrumentation
capabilities. The enhanced communication characteristics of
this important technology are reflected in the protocol
name, HART which stands for “Highway Addressable Remote
Transducer”.
The HART protocol enables two-way digital communication
with smart instruments without disturbing the 4-20 mA
analog signal. Both the 4-20 mA analog and HART digital
communication signals can be transmitted simultaneously
over the same wiring. Primary variable and control signal
information is carried by the 4-20 mA (if desired), while
additional measurements, process parameters, device
configuration, calibration, and diagnostics information is
accessible through the HART protocol over the same wires at
the same time. Unlike other “open” digital communication
technologies for process instrumentation, HART is
compatible with existing systems.
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
the output of the common trasmitter protocol in qatar gas are the following
give me all the details about the interview and which type of question being asked
How do bending tubing provide better measurement than using tubing fittings such as elbows?
can anyone tel the syllabus or previous year question paper for BHAVINI(EIE)2014.
i have used level transmitter in starch cooking preparation tank. tank total height 2mtr.sometime LT display shows some error value when tank is fully empty and diaphragm side i already checked okay no problem in diaphragm area. field cable checked 24volt and mA shows correct value while tank empty mA is 4mA. 4mA i needed that 0% but display showing 10% or 15% percentage values are varying continously please give any good solution for me.....
How to calibrate Field bus transmitter? procedure ?
How to Calibrate Level Troll in field
What is the use of GMV in turbine?
What you mean by multi stage control vavles?
Can I calibrate the Electromagnetic Flow Meter on line and How.
HOW CREATED LP & HP PRESURES IN DRUM FOR DRUM LEVEL MEASUREMENT!
Describe the functions of the Operator Interface including the considerations related to alarming and display layout/configuration/layers.
Please any one can provide latest aptitude test,technical test and interview questions for tata consulting engineering (TCE) i need it asap thanks in advance
What is the difference between uv and ir scanners? and what is the workig principle of both
Hi i m B.E. In elect. & comm. I m workin in bio mass plant from 6 mnths as inst. Engg. but now i m in dept. Of operation as shift engg...which is best operation or inst. 4 me? M confusd..plz help and reply me..
