why relays are used with plc?

4 Answers  

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How DP Transmitter can be calibrated for crud application in floating roof tank?

2 Answers  

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hi sir yhis is zahid ali i am preparing for the jspl at oct.4.please send me the recently updated sample paper.

0 Answers   Jindal,

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What is 3 element control system

0 Answers  

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how level can be measured in open tank with reference to pressure

1 Answers   Atul, INOX,

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what should be the distance of vibration sensor & to the point where vibration to be measured Ex turbine axial displacement

3 Answers  

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We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

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i m passed my engineering in 2010 in instrumentation and control engineering. my question is can i apply for software jobs or vacancies.??????????? plz give me answer soonnn......

2 Answers  

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what is droop in governer ,type of droop ,how it work

0 Answers   TATA,

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Pressure tx shows 1 mbar but we need 1000 mbar at this process condition .. how can we sort it out .

0 Answers  

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what are the pinciples & units of flow, level, temperature, pressure, quality.

1 Answers  

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what is the electrical operation procedure for switching on 27.6MVA electric furnace.

0 Answers   Jindal,

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