Explain PID, ON/OFF, Controls
- 1 Answers
- 2119 Views
- CCIE, Gulf Engineering, I also Faced
- E-Mail Answers
Answer Posted / Narandra Singh
PID (Proportional-Integral-Derivative):
- PID is a control method used in various systems to regulate the output and achieve a desired setpoint. It combines three control actions: proportional, integral, and derivative. The proportional action adjusts the output based on the error between the setpoint and the current output. The integral action addresses steady-state errors by summing the error over time. The derivative action anticipates changes in the system to improve response time.
ON/OFF:
- An ON/OFF control, also known as bang-bang control, operates by switching between two states (e.g., on or off) based on a predetermined threshold. When the measured variable exceeds this threshold, the system switches to the opposite state. However, ON/OFF control is not as effective as PID in regulating systems with complex dynamics because it can lead to oscillations and poor stability.
Controls:
- In instrumentation, controls refer to the devices and systems that regulate, monitor, and operate various processes. These include sensors, actuators, valves, switches, controllers, and more.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
sir, give me placement papers and interview quistion of birla group company of copper.
principle of dead weight tester ?
where cascade loop use ?
Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com
plz you help about Que paper of mahagenco previous your,any model paper relad to it{maharastra power genration}
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.
use of split range ? where it is used ? in which control loop it is used ?
Question on maha cement
What are the key features of a Distributed Control System? describing the various layers (sensor through to business system interfaces) as well as the hardware, software and security aspects of the DCS.
give me all the details about the interview and which type of question being asked
please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826
Can any body help to get Rsemulator 5000 free from internet if possible then give me any link or any help .
this site is owned by an nonsense
Can any one tell me what type of question asked for instrumentation and control interview panel??? pls mail ramashankar.goel@gmail.com
please send me some question papers of HPCL aptitude test ?? please send it to bipinb.28@gmail.com ...
