Answer Posted / ninad gaikwad
The best part of answer is already mentioned in
above i.e DATASHEET as well as HART communicator.
If you want to use DP Tx for level of tank then
range of DP Tx will be get From C-C distance of tank from
tapping, by using simple formula i.e: (height * density=
range). It means you will get range of DP transmitter for
level.
If you want to get the range for Flow. in that
case please check the orifice plate which is already
installed in line, you will get the range.
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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.
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use of split range ? where it is used ? in which control loop it is used ?
