Answer / ram

certification of flame proof can be taken from CMRI Dhanbad

how to write the program for single push button by using ladder diagram

22 Answers   DigiTech,

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what is exat meaning of compentation in RTD ? what diffrent between 2 wire,2 wire and 4 wire RTDs?

2 Answers   Atul, Vardhman,

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where i can get training in INTOOLS and PDMS in Delhi-NCR OR north part of India. please reply with ur ans. at arunsamkaria@ymail.com

0 Answers  

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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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1 bar is equal to how many pound per square inch(psi)?

14 Answers   Essar,

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why we use the 4-20 mamp signal used for transmitter.

5 Answers   Tecnimont,

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In separator VFD frequently trip with OVER VOLTAGE Fault What is the reason?

4 Answers  

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what are the values of fuel flow rate in various places in boiler.

0 Answers  

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why use 4-20mA in the field of instrumentation?

8 Answers  

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wt kind of business we can do by usig PLC?

2 Answers   Dabur,

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what is droop mode n frequency mode in wood ward governor?

1 Answers   TATA,

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what is bms?

4 Answers   Emco,

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