Answer / john

During the design and engineering of a process plant, a
good
designer should plan for _the process requirements_,
_client specifications_ and
_fundamental_ aspects of the plant

What is the principle of a Pressure gauge?

2 Answers   CCIE,

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what are the diff. in servo and regulatory control?

0 Answers  

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What is the GK Value in Flowmeter?

0 Answers   IBPIL, Thermax,

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send me last 5 years questions asked in rrb chennai, for section engineer

0 Answers   RRB,

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what different types of problems do occur while doing instrumentation commisioning and how to solve them? please explain in detail

0 Answers   Process Control Technologies,

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What is the difference between PLC and DDC?

0 Answers   Emami,

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Hi buddies! my name is sachin and i am working as a electrical and instrumentation engineer in a paper plant. right now i am facing a problem and if someone could help me it will be an immense pleasure to me. i am using AC 800M to synchronise DCS500 drives on paper machine and rewinder.communication is on PROFIBUS and we are using NPBA-01 module to link profibus to DC drives.But these days two of these drives are showing a error named FIELDBUS COMM.TIMED OUT and the drives get tripped.I have changed the NPBA module and PROFIBUS cable.So if anyone can do please help me out with this problem.I'll be highly grateful.

0 Answers  

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why we are not using the turbine flow meter in the steam service?

0 Answers   Jaypee,

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What is the difference between HMI,SCADA and MMI,not abbrevation?

7 Answers   HCL,

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what is maxdna ?. explain about the software details.

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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Difference between dcs and plc including date processing and architecture.

0 Answers  

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