Answer / laxit

Question is wrong, Now a days, PLC with mega expansion
capacity is available. One need to check the scaning time
requirement and avaiblity isues pertaining to process




For a large system DCS system for control is acceptbale
however for safety function there shall be PLC (ESD)
system. In case of small application where as PLC can work
as safety and control purpose shall employed.

Answer / lalit

plc cannot handle or show analog value...DCS HAVING
SPECIALITY TO MEASURE AND CONTROL ANALOG I/O RELIABLY

Answer / rambir singh

DCS and PLC are same in functioning but the difference is that DCS can display what happening inside PLC.

how can calibrate transmitter online

2 Answers  

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Why would an Engineer consider combining FEEDBACK and FEEDFORWARD control in some applications?

4 Answers   Jindal,

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what are the steps to commissioning a DCS system?

2 Answers   BGR Energy,

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Can we use a 10000 Lph Flow Transmitter in 100 LPH flow line to get 20mA O/P by adjusting SPAN ?

1 Answers  

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why dead weight tester called dead weight tester.

5 Answers   QAFCO,

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if change the pid in D value so what action.

2 Answers   Siemens,

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hi friends,can u send me the link for downloading Allen_bradley_RsLogix_500_Pro_V_7.0 software with activation file.or how can i find activation file for this.

2 Answers  

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What is actuator what is motorized control valve?

5 Answers   Emco,

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What are advantages and disadvantage of the ac supply load cell?

0 Answers  

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What is Process portal A(PPA)?

1 Answers   ABB,

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units for vibration in power plant

1 Answers  

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I have a steam flow DP transmitter that has output swinging. Steam valve is in manual.I have good steam pressure. The impulse lines have steam tracing on them. The steam tracing has a hole in it that is blowing raw steam on the high side impulse line only. Could this be causing the swinging?

1 Answers   Honeywell,

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