Answer / anurag,e&a ispat ind. ltd.

in manual control system all the controlling parameter have
been controlled by operatorbut automatic control system all
parameter are controlled by automatic control system by
using plc,dcs @scada system.

Answer / harsh zala

In manual control system, operater has to calculate the
manipulated variable(MV) manually..like we r controlling a
speed of two wheeler by accelerating it by our hand...

While in auotmatic control system u need to give set point
(SP) and acoordingly we programmed the system it will try
to reach the desired output(sp) automatically.uit does not
need manual calulations.as it is already programmed.

Answer / elibariki

automatic control system is the closed loop system that requires no operator e.g Automatic furnace temperature system
Manual system is the system that requires an operator

Answer / dibyalochan sahoo

In automatic control system sensor is used to reduce the error.in manual control system user is responsible to reduce by observeving output.it is a close loop control system .in place of sensor here human is present.an open loop control system with human involvement called manual control system.

Answer / uday

Human operated system is called manual control system.like speed control of vehicles.it's operation based on human sense.
Automatic control system have sensor mechanism, sense the actual condition and send feedback to controller.

Relation in MMWC to Flow rate

1 Answers  

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What is the Main principle and formula for the steam flow compensation?

2 Answers  

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which one is best profibus or RS485 for communication?

2 Answers   Honeywell,

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what is the role of proportional in process control?

6 Answers   OGDCL, Trident,

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Please explain for RS 485 & RS 232 communication

1 Answers   Honeywell,

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Please can anybody tell me the step by step procedure for calibrating the Pr,Lvl,Fl,Temp transmitter on process?

1 Answers  

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what's the reson that,Load is not same on VFD I/P and O/P Side.whenever DOL condition load is same I/P and O/P side.

2 Answers  

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Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?

0 Answers   KOC,

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what is the reason for flow fluctuations happen on differential flow transmitter during in service

2 Answers  

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if we open the inlet of an air regulator ,how it will affect the out put of regulator? (out put of regulator is using to operate an on-off valve.it is an air to open valve,and valve is in open position.my doubt is air regulator will hold the valve in open or not,if there is no consumption or leak in regulator out put side ,we only loose the input pressure.)

4 Answers   Asian Paints,

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what is the differnce between PLC & DCS

7 Answers   TVS,

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What is the DIfferences between SMART transmitters and PROFIBUS DP/PA Transmitters?

4 Answers  

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