Answer / jhadi.rajender

properational integral derivative

Answer / krishna raj salim

There are two expansions for PID

1: In PID controller: It indicates "
Proportional-Integral-Derivative " Controlling modes.

2: In instrumentational diagramatic representation of
industrial parts,material flow paths etc., it is known as
"Piping and Instrumentation Diagram"

Answer / vaibhava satsangi

p = proportional = decides the action for the same error
(error = Process Value -Set Point)

I= integral time, ie, repeat the same action after how
mutch time.

d = derivative, to make action slugish, otherwise always
the output will keep on changing.
vaibhavasatsangi@yahoo.co.in

Answer / pradeep bhola & nayan pate

P:Propotional, decides the action for eleminate the error
(error = Process Value -Set Point)but generate Offset

I:Integral, It will eleminate the Offset which is generated
by the Proportional gain but generate continous oscillation
in the system

D:Derivativeto, make action slugish & Stable.

Answer / divya

PID means proportinal integral derivative. total pid will
eliminate the errors which presented in the process.

Answer / ramesh

proportional =output/input
gain is inveresly proportional (p)
for example p=50 means setpoint =50 the pv varies the 25%
above& below the setpoint that is Gain =1/50 = 0.02x100= 2
setpoint /gain that is 50/2 =25 so pv varies from 25%to
75%

intergal the time which to reachthe 25%to 75% is called
intergal if you set I= 10 means it will reach 10 sec

derivative generally D is used for only temperature loop

If a normal magnetic type flow transmitter that can measure flow, temperature and show this parameters on field, is it possible by any means to get this (flow and temperature) parameters info. On dcs? And if yes then with HART, FO communication or any other communication system?

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