Interested to Buy Any Domain ? << Click Here >> for more details...
IF TX SHOWS SLOW RESPONSE, WHILE A CLOSE LOOP AND WHEN
WE PUT THE CONTROLLER ON MANUAL THE PROBLEM RECTIFIED,
SO WE CAN SAY THE PROBLEM IS IN
- 1 Answers
- 3862 Views
- IFFCO, I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
The problem is in the controller's PID tuning, which is
tuned to be too sluggish.
All of the loop's control components work properly:
- the transmitter reports the process variable
- the controller responds to an error (albeit too sluggishly)
- the control valve responds to the controller's output, as
evidenced by switching to manual mode
The PV response as reported by the transmitter depends on
the controller's appropriate response to error. If the
controller's response to error is sluggish, then the loop's
PV response will be sluggish.
Manual mode offers a means of overriding the PID's
calculated output value and driving the output to where it
needs to be.
This question qualifies as one of the best interview
questions I've read on this site. I'll be sure to use
this question when I interview candidates.
Carl Ellis
Measure First
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
how can use ram
what is piezoelectric transducer?give an example in power plant n state its principle?
What is feed factor and its Importance in cement industry? How we can solve feed factor?.
What is the differerence between hysterisis and linearity.
Tr. Wiring for calibration.
What is standard procedure of manual mapping in Radar type level transmitter?
what is the difference between scaler and vector drive
Decibel.
How to work temperature gauge?
How can a d.p. Transmitter be calibrated?
ORP sensor working principle?
Can anyone send most commonley asked Instrumentation questions and answers in cement industry please?
how to calculate signal cable sizing? and multipair cable sizing??explain in brief?
How digital input and digital output 's are working in dcs
What is the use of temprature compensation?
