Answer / jignesh parekh

A meaning of pid controleer is propotional integral
derivatives.
in general, it is related to field parameters which comes
in dcs system and for this all parameters such as
flow,temperature,level,etc, we have to fine tuning to all
parameters ,so they will be set in dcs system and also
operate the field insrument as per the requirement of the
plant.
its basically control feedback parameters.

Answer / m.ramtarkam

PID controller is used for control of any process parameter
in all types of Industries.PID stands for
Proportional,Integral and Derivative.A basic controller
comprises of three components i.e Process variable ,
setpoint and final control output.
There are many types of controllers such as cascade ,
remote set point,feed back , feed forward etc.
Proportional = 100 / xP ( unitless)
xP = gain
Gain = change of output/change of input ( unitless)
Integral : the time taken in seconds for a process variable
to travel one proportional band is called as integral value.
( unit seconds)
Derivative : rate of chage of output is called as
derivative (unit seconds)

Answer / elsayem

pid controller stand for proportional integral and
derivative
it is afeedback control
proportional some times called gain

Answer / rajesh

PIDcotrol is mostly prefered in industries for process
control.it have three elements proportional,integral,diff,p
element is used to produce the contol o/pbased on present
error i/p,integral is used to avoid offset,derivative is
used for change in error i/p.pid has the advantages of all
three elements

I am a electronics and instrumentation fresher trying for a job in IT sector. what do need to prepare for the interview?

2 Answers  

---

how bolometer is used in temperature measurement ??

1 Answers  

---

hay friends, i am in trouble to understand PID controller. several times i have study but it is not clear to me have you a simple way to understand.

1 Answers  

---

What is the electronic transmitter frequency.

1 Answers   CPCL, QAFCO,

---

what is the working principle of hydra step(electronic level indicator)?

2 Answers   Bengal Energy, Lanco,

---

thru which signal does µP communicate with memory

3 Answers  

---

what will happen if transmitter wire get shoted?

2 Answers   Sabic,

---

Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls

0 Answers  

---

WHAT ARE MAIN DIFFERENCE BETWEEN DCS AND SCADA?

7 Answers   ABB, Gold Fields, Rand Water,

---

Explain the burnout feature.

0 Answers  

---

What is the loop calibration? Which instrument used to loop calibration and how?

2 Answers   Descon, QCon,

---

What is the maximum operative of Drive ?

2 Answers   Reddy Labs,

---