Answer / thirumalai

mantaince in software side is about the DCS backup of histroy data , ERDB file eys

What is Cavitation?

2 Answers   Gujarat Borosil,

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what is full form of SMART

46 Answers   Infosys, ITC Infotech, Lanco, Rosemount, Solvay,

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WHAT IS TMXT IN TEMPERATURE FOUNDATION FIELDBUS.

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What is the difference between sdv and bdv ?

1 Answers  

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Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...

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A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

0 Answers   MNC,

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what does it mean an active front end in vfd plz explain it briefly

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pls any1 sugges me book for plc,dcs & scada..

1 Answers  

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yokogawa Temperature transmitter showing Error 15 which is Reverse Cal Fail (confirmation calculation result is bad) in manual they mentioned reasion That the output goes to the value set by hardware failure mode jumper. How can solve this problem ? anybody can say solution

1 Answers   GTL,

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Is Hart communicator calibration device or communicating device for transmitter?

4 Answers   Yokogawa,

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TCD Principle

1 Answers  

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define optical temperature detector

1 Answers  

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