Answer / satish awate

PLC is programmable logic control in this field instrument are connected to input or output of PLC input & output. And PLC are connected to DCS system or SCADA or HMI by a RS232 or RS434 communication cable.

Answer / rajendra singh

first of all I want to tell you connection from field to DCS:

Example: C.V. to Tx. to controller via Ethernet cable to DCS.

Answer / nnnnnnnnnnnnnn

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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  

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What is PID tunning

2 Answers   EID Parry, MFL,

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In control valve there are two type of valve seat we can use metal to metal seat & soft seat.On this valve seat i have following doubt. 1)I have never seen practically the internal assembly of valve so my doubt is that basically weather the seat is soft seat or metal its basic MOC is same as valve body(SS or CS) only in soft seat we are using PTFE ring & place on valve seat & in metal this PTFE ring is not threr am i correct??????? 2)what are the common general rule for using metal to metal seat & soft seat,means its depend on process parameter like liquid,gas, steam & on valve leakage class.

1 Answers  

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1)how can calibrate temperature transmitter? 2)how can calibrate flow transmitter? 3)how can calibrate level transmitter?

3 Answers   ccic, Emerson, JK Pharma, NIGC, Rockwell, UltraTech,

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How to zero trim the level transmitter by using foundation fieldbus communicator.

2 Answers   Emerson,

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in a electronic controller why we are using 250 ohm resistance in input signal?is i/p is necessary in control valve when we are using electronic controller give details?

3 Answers   IOCL,

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How is PH sensor works ?

0 Answers  

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why we set -10 volt in vibration sensor output,why not +10 volt

3 Answers   Sabic, TVS,

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Yokogawa dcs nodes advantages?

0 Answers   Petrochemicals,

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For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?

0 Answers  

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how flame detectors sense the flame.

3 Answers  

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why we use 3 wire rtd direct wiring for temperature measurement instead of temperature transmitter like bearing temperature

0 Answers   ABG Energy,

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