Answer / rajendra singh

In DCS 4 TYPES OF SIGNAL IS USED

1) AI - ANALOG INPUT THIS FEED BACK SIGNAL FORM (4 - 20 mA)
2) AO - ANALOG OUTPUT COMMAND GIVEN FROM DCS (4 - 20 mA)
3) DI - DIGITAL INPUT (FEED BACK 0 OR 1, HIGH OR LOW)
4) DO - DIGITAL OUTPUT (PICK UP THE RELAY 0 OR 1, HIGH OR
LOW COMMAND GIVEN FROM DCS)

Answer / ashish khatana

1) AI - ANALOG INPUT THIS FEED BACK SIGNAL FORM (4 - 20 mA)
2) AO - ANALOG OUTPUT COMMAND GIVEN FROM DCS (4 - 20 mA)
3) DI - DIGITAL INPUT (FEED BACK 0 OR 1, HIGH OR LOW)
4) DO - DIGITAL OUTPUT (PICK UP THE RELAY 0 OR 1, HIGH OR
LOW COMMAND GIVEN FROM DCS)
5) T/C INPUT- FOTR THERMOCOUPLE
6) RTD INPUT- FOR RTD
7) THIRD PARTY COMMUNICATION- LIKE PLC INPUT OUTPUT,
CONTROLLER INPUT OUTPUT (IT IS DIFFERENET FOR DIFFERENT DCS)

Answer / khurshidmallick0786@gmail.com

Khurshidmallick0786@gmail.com

Answer / farhan

Dcs  under  stand  just 1 to  5  volts  therefore 1---5volts enters in  it.there  is  a  currernt  to  volt  converter available  in  dcs.

plz... clarify my answer, how to calibrate vaccum (DP)leveltransmitter,it is hart. (digital).DETAILS:(coloumn)closedtank height 2650mm,and tx range is 0-1500mmH20.

2 Answers   KNPC,

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Galvanizing.

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I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.

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why 4 to 20 ma? why cant some other range?

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How to work mass flow meter ?

1 Answers  

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How to isolate a DPT from line in the condition that process must not be disturbed,and process is also critical and no bypass is available.?

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Why drum level range is given -500 to 0 mmwc pls give me that answer

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how to check thermocouple ,its working or not?

14 Answers   Coca Cola, Ford, Honeywell,

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What is the role of Integral in pid control?

6 Answers  

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how to calculate orifice sizing? and tell me if pipe size bet 50mm t0 200mm then we can use pipe flange??? and above 250mm pipe size should i use D & D/2 Flange? is it right or wrong?

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How a oxygen sensor & analyzer work at boiler or furnace, whats the principle & science is beyond this,How O2 sensor sence & convert signal & move toward analyzer & analyzer show reading in percent?

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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?

1 Answers   Process Control Technologies,

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