Answer / sunil

First of all we maintain a communication protocol between Plc and drive then only operate i.e modbus communication

Answer / dipesh shrivastava

All plc's work under four checks
Ai - Analog I/p
Ao- Analog o/p
Di - dig I/p
Do- Dig o/p
Commands like Motor on & Off are Do's
Commands like Drive operation, control valves operations means any type of partial operations between its low range and high range will be AO
Inputs are of 3 major types , (0-5) V DC, (0-10)v DC & (4-20) mA
All types of feedbacks like proximity ( PNP,Npn ) then feebbacks like actuator open/close, Motor on/off/trip, Feeder healthy/not healthy will be Digital inputs

in instrumentation why we are using 4-20mA , why not voltage ? if somebody design a instrument which works on voltage then can we use that instrument?

6 Answers  

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HOW WE MEASURE A DRUM LEVEL BY DP TRANSMITTER ? WHAT IS ITS FORMULA ?

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If a normal magnetic type flow transmitter that can measure flow, temperature and show this parameters on field, is it possible by any means to get this (flow and temperature) parameters info. On dcs? And if yes then with HART, FO communication or any other communication system?

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In your own words, would you expect an ultrasonic level device to work better in a pressure vessel with a high pressure or a strong vacuum, and why?

1 Answers  

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What is PLC(programmable logic control)?

1 Answers  

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WHAT IS THE DIFFERENCE BETWEEN PLC AND DCS

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what is a boiler tube leakage detector? ... what is the working principle ?

1 Answers  

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What is difference between “Fault Tolerant” & “Fault avoidance” PLC? Application where these system s are used?

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plz exlain the dcs system of ABB sympony hamnony

1 Answers  

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where proximity sensor installed on tank in loading arm application

0 Answers  

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yogokowa field bus system transmitter all's we are geting IOP fault in Contiunes please help me fine how we can normal the broblems?

4 Answers   ABB,

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please give me combustion cntrl interlock details? if possidle drawing also?for this one is there any website ?

1 Answers  

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