Answer / bunny

Modbus,Profibus and Fieldbus are industrial standrad
protocols with which instruments are communicating each
other. A protocol is a set of rules that governs
communications within a network, defining everything from
how connections are made between devices to how the message
itself is formatted. They can be implemented through
software, hardware, or both.

Answer / arash

In practical issue , main differents are: Lenghth of
segments , capability for using in hazerdous areas ,
communication speeds , number of devices can be connected
to them and also kind of industry they are going to be
used .

What is the cv of a control valve?

2 Answers   CCIE,

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2 Answers   HCL, SOC,

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if we have 450 mm heigth boiler drum level ,so what is span & zero value for a dpt tranmitter

4 Answers  

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Why we are using DPT(Differential Pressure Transmitter) in separator instead of level trasmitter?

0 Answers  

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How we calculate orifice plat size???

0 Answers  

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which one is best profibus or RS485 for communication?

2 Answers   Honeywell,

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2 Answers   Descon, QCon,

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a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of 0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the accuracy ratio? is this ratio acceptable?

2 Answers  

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

4 Answers   L&T,

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12 Answers  

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How to calibrate level switch?

2 Answers   Power Plant, Sabic,

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What is instrumentation measurement?

0 Answers  

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