Answer / guest

DIGITAL OUTPUTS SIGMALS MEANS NO OR NC CONTACTS & DO COMMANDS
MEANS CONTACT CHANGE OVER ALONG WITH VOLTAGE 24 V DC 0R 230 V
AC

what is the protection system in solar turbine compressor

0 Answers  

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Can I calibrate the Electromagnetic Flow Meter on line and How.

0 Answers   SEWA,

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what is difference between positioner and position transmitter in control valve

2 Answers  

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what is difference between modbus & fieldbus

1 Answers   ABB,

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what is axial shift n what is differential expansion in turbine? how many sensor probes r mounted for this n how it works?

2 Answers   Apple,

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what is commisioning procedure,2)what is is the main work in commisioning in the field tx to dcs, plz send me detail

0 Answers  

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what is the difference about HART, and 4-20mA signal?

8 Answers  

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Why we use 4 - 20 ma?

6 Answers   IJT, ONGC,

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i install a DP transmitter of Faugi on drum level of boiler but i face a problem in it when i engergize the transmitter the meter shows 0 or 100% no variation in it.the distance of two points is 19.5 inches, i am in trouble please suggest me what can i do it's very urgent Please reply me as soon as possible Best regards ikraam haider

5 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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uses of profibus?

1 Answers  

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what is o2 analyzer and how it measured ,what is the role of this analyzer in cfbc boiler...

0 Answers   Mittal Steel,

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