Answer / rakesh p i

Plc stands for programmable logic controller. Its a solid
state device which works on boolean algebra.\
Dcs is distributed control system which consists of
associated plc's and remote i/o devices

Answer / hitesh

PLC having its own/single controller but in DCS there are
more than one controller for each section. in case one
controller fails other section will run but its not
applicable in case of PLC

Punj lloyd is coming in our Jadavpur Universtiy campus for campus placement. Please send me some hints about the writtend exam. My email id is subratafriends@gmail.com

0 Answers   IGL, Punj Lloyd Ltd, Shapoorji Pallonji Group(SPCL),

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What is the use instrument barriers? Can you give me review materials about this?

1 Answers  

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What is the use of keyphasor in turbine.

7 Answers   Hindustan Zinc, R&D,

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How many types of sensors are used in instrumentation & what are names

1 Answers   CTC,

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Furnace draft transmitter range is -50 to +50 mmwc. why the impulse line connected in hp side?

2 Answers   Arena,

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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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Level in tank under vacuum (Ex: Condensate Tank of Power Plant)is measured using D. P. type level transmitter. Tank is subjected to vacuum of 755mmHg. Is it possible to fill wet leg ( i.e. leg connected to top of vessel with low point of D. P. xmtr) with water?. Are there chances of water getting sucked under vacuum? if yes, what is the solution?

3 Answers  

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HELLO FRIENDS plz tell me which are the PROTOCOLS we are using in PLC

3 Answers  

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I work on a electronic positioner transmitter 4211 at the field.I connect my multimeter in series to get the current output then I calibrate it to 4ma in 0% of position of the valve and 20ma in 100% position of the valve.My problem is in the field I get the correct output current based on my multimeter but in the dcs they only receive 40% in a output 20ma of this positioner.Then I try to simulate in this analog card and they receive the equivalent percent on the value that I simulated.Is ther any possibility to reset the zero and span of this positioner 4211 fisher.And what other possibility I can do to fixed this.This is my email add ( landicho_randy@yahoo.com )

4 Answers  

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Can SmartPlant Instrumentation be used in a concurrent engineering environment?

1 Answers  

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Explain pH, Conductivity.

0 Answers   CCIE,

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without color coding, without nameplate, without multimeter how can you find the type of thermocouple???

1 Answers   Sabic,

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