Answer / anas

Typically in the industry, below signal type is used as communication protocol between field devices and marshalling/system cabinet.
Analog signal = 4-20mA, HART protocol for advance application
Digital signal = 0-24V
Alternatively, there is also PROFIBUS and FIELDBUS.

In terms of cabling, instrument cable is a typical 1-2mm copper multicore cable while bus cable refers to application involving PROFIBUS and FIELDBUS.

can we replace a slot sensor (inductive type) with limit switch (potenial free contact / no-nc type).

0 Answers   Max India,

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In RTU Panel we are having several Analogue & Digital Inputs /Outputs. We are recently facing some problems over Analog inputs , which are not updating properly (But Digital Input are updating normally) Can any one tell me from where the problem is creating , we have checked PLC CPU card, Analog Input card & we reconfigured ,But still the issue is there. Issue : 1. Sometimes Analog values are updating & sometimes not. 2. Analog values are not updating normally , showing some wrong Values 3. Total dead (0 value) Analog values are Level & flow measurement from the field instruments. (But in field the instruments are working normally & Displaying the values normally in local display unit) This problem we are facing in our Water Plant. If any one experienced this same problem or having any ideas related to our issue PLS send your valuable Answers/Replies...

6 Answers   L&T,

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What properties or parameters to be taken into consideration for protection while selection of Dcs controller.

1 Answers   JPL,

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Can any body help me,The GE Mark V control system is windows based or Dos based?

3 Answers  

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how to calibrate absolute pressure transmitter

7 Answers   ABB,

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how to calculate the temp. of RTD&Thermocouple when we got some mV r Ohms?if anybody has d chart pls mail the chatrs to me...

1 Answers  

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can any one pl explain me in brief that how we select the leakage classification in valve,means for liquid or gas there is any standard for selecting leakage classification or its depend upon valve size or any any other parameter.

3 Answers  

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In most instances, Inertia processes are quite uncommon. Give an example of a combined Resistance and Capacitance situation.Describe an application, which according to your understanding of the subject matter, comprises of both Resistance and Capacitance effects.

0 Answers  

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Make a ladder diagram on LSL valve will close, on PSL valve will open and start the motor

0 Answers   CCIE,

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why metallic housing is provided of solenoid valve.

1 Answers   HPCL,

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What is difference between Ionization heat and bimetallic heat

0 Answers   KOC,

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What is re-latch the manual trigger in solenoid valve

0 Answers   Valvitalia Systems Division,

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