Answer / nil patel

PLC is a control system through which u can control the process parameter in the entire plant.

Answer / dattatray nikam

PLC:Programmable Logic Controller.

Name itself indicate that one can program their logic into
controller to performs sequential operation.

Answer / welcome4ujd

A programmable controller is defined as a "digital
electronic device that uses a programmable memory to store
instructions and to implement specific functions such as
logic, sequence, timing, counting, and arithmetic to
control machines and processes"

Answer / chandradhar

plc is a programmed interface between field input's and
field output's.
field input's for example sensor's, swtiches,pushbutton's
etc.. and
field outputs like motors, drives,solenoid valve's, etc....

why generation of syncronized generator increases when frequency of grid is less then 50Hz & generation decreases when grid frequency goes up from 50 Hz, as comparision with set value entered in govering panel?

1 Answers  

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A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?

0 Answers  

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Hi Frnds , If Suppose 1 Pair cable of 1.5 sq mm is used for Transmitter and instead of 1.5 sq mm if i used 0.5 sq mm cable will the resistance change will occur and does it affect our transmitter reading. plz mail ur answer to ntnkamble@gmail.com plz immediately mail ur reply

1 Answers  

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which one is best profibus or RS485 for communication?

2 Answers   Honeywell,

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Technician A says that a fuel tank sending unit will have a high resistance only when the tank is full. Technician B says that its resistance when the tank is full depends on whether the sending unit is designed for use with a bimetallic gauge or with a magnetic gauge. Who is correct?

3 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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Flame scanner

1 Answers  

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in yokogawa prosef rd safety PLC how to data send frome local SCS to other SCS and other FCS

2 Answers  

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what is Green field /brown field exposure in chemicals /oil /petrochemicals /refineries /paints /speciality chemicals /gas /FMCG /glass industry

1 Answers  

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what is the exact job for automation enggineer?

0 Answers  

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what is full form of SMART

46 Answers   Infosys, ITC Infotech, Lanco, Rosemount, Solvay,

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I am a instrument technician. recently i attend interview and face one of question for DP transmitter ,the client asking about the calibration of DP transmitter ,am answer the calibration procedure, they will ask one more question. why open LP side in atmosphere? i did not answer that question. so please help me and explain the particular question. Dear firends waiting for your valuable replay

3 Answers   Qatar Petroleums, Samsung,

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