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
- 2995 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
Type of level transmitter commnly used in Procees area are the following. a.________________This type of level transmitter works as follows
Specify for Cables - Flame Retardant and Fire Resistant?
Draw a P& ID showing – orifice flange, plate, dp transmitter, isolation & bypass valves and tubing.
Hi my friends Is any one who can assist me in knowing the typical interview questions for system engineer at General Electric pty Ltd
How many types of sensor
What types of Instrumentation Related Questions can an Interviewer ask in a Telephonic Interview ?
What is solenoid valve? Where it is used?
why we are using magnet for calibration of gas detector?
Where Can i take a SPI INtools training in Mumbai? In Rolta India Ltd to whom I should approach regarding of SPI INtools Training?
Where are oxygen analysers installed in cfbc boilers? What are their usual readings?
What are the type of bonnets in the control valves?
what is the procedure to callibrate temp controller ,pressure controller,etc. suppose a temp controller showing error 1.5 degree centigrate how can i minimize it.
Draw a wheatstone bridge circuit showing supply, meter and 3 wire RTD connection
2. What is ultrasonic flowmeter?
which processor is used in dcs.
