Answer / ecxlsync

Proportional is to respond the magnitude or error of the
process.
Integral is to respond the number of error occured at a
given time (integral time).
Derivative is to respond the rate of change of the error at
a with respect to time.
PID is a Control algorithm to perform a control action on
the final element usually a control valve to correct the
error of the process value and lead-lag effects.
proportional term will determine the amount of
opening/closing the valve with respect to the error signal.
Integral will eliminates the offset and tries to set back
the process value to the setpoint.
Derivative is to reponds quicky as the error is about to
occur.

If relative y axis vibration sensor is by passed, and relative x axis and absolute sensor is left working. how much monitoring i would have risked?

0 Answers  

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who discoverd ohms law?

6 Answers   HPCL, Patni,

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What are the types of valves?

0 Answers  

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I work on a electronic positioner transmitter 4211 at the field.I connect my multimeter in series to get the current output then I calibrate it to 4ma in 0% of position of the valve and 20ma in 100% position of the valve.My problem is in the field I get the correct output current based on my multimeter but in the dcs they only receive 40% in a output 20ma of this positioner.Then I try to simulate in this analog card and they receive the equivalent percent on the value that I simulated.Is ther any possibility to reset the zero and span of this positioner 4211 fisher.And what other possibility I can do to fixed this.This is my email add ( landicho_randy@yahoo.com )

4 Answers  

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in a power plant which system are compensated?

2 Answers  

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Explain signal isolator

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what is "smart" in smart transmitter ?

4 Answers  

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should I use Hydrostatic Pressure Transmitter for measurement of DENSITY of filled tank ? If YES then please explain how.

2 Answers   HPCL,

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On drum level, why we are using air to close Control valve?

4 Answers   L&T,

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Why only negative 24 vdc supply give in vibration measuring system.

6 Answers  

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Why we use the double acting control valve in flow line?

3 Answers  

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what are the three main programming languages in plc

12 Answers  

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