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Question
what is difference between modbus & fieldbus
 Question Submitted By :: Instrumentation
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Modbus is a Modicon bus it doesnt require dedicated
interface card as it required for fieldbus(Profibus) Modbus
can communicate from serial printer port via RS-485 n RS-
232 while Fieldbus can communicate from RS-485 ONLY.
 
Is This Answer Correct ?    44 Yes 14 No
Hemant Bhati
 

 
 
 
Other Instrumentation Interview Questions
 
  Question Asked @ Answers
 
pressure gauge measure static pressure or dynamic pressure?   2
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tell how to calibrate a magnetic flow tx, vortex flow tx,dp flow tx,nozzle flow tx and venturi flow tx? TATA 2
why use squareroot in flow measurment by dp transmitter?   4
What is the meaning of Dry contact and Wet Contact related to to sensors? Emerson 5
Y to use 4 to 20ma instead of 0-10v   5
hi i want sov loop cheak from consol to field the operater given status to sov still no change, but MR room to sov ok so whats a problem and alreasy cheak all conection ok ?   2
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what is beta ratio?   2
WHAT PRINCIPLE OF GAS ANALYSER( CO,CO2,N2) Jubilant-Organosys 2
with the help of suitable diagrams different types of control valves   1
i want to make project on process control using plc.please give me idea about this.   2
 
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