Answer / rafaqat

Profibus is used to make comunication between PLC & other
devices like inverters etc. this is siemens technology
mostly used on siemens PLC, while Allen Bredly use DH+,

also some other protocoles are also available in the market.

1. Pl. send details about different types Gas Analyser, like Co2, O2, SOX/NOX, etc. with calibration procedure. 2. How to calibrate H2S gas detector in field?

1 Answers   HPCL, Napesco,

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what is the difference betwwen the 2wire level transmitter and 4wire level transmitter??and their applications also??

2 Answers  

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cascade controller is feed back or feed forward or both

4 Answers  

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3element

2 Answers  

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what are the documents(Construction point of view for a process plant) submitted by contactor initially entering in to new site for client?

0 Answers   NTPC, PSU,

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What are difference between automatic and manual control system?

5 Answers  

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How do you identify an orifice in the pipeline?

0 Answers  

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how to calibrate temprature switch and flow switch ?

1 Answers   Adgas,

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1.In which princeple DP transmeter works? 2.Why UPS system is use for DCS? 3.How drum lvel controller works? 4.What is the difference between glob valve and gate valve? 5.How axial shift probe work & in which princeple it works?

1 Answers   Luberef, Qatar Gas, Reliance,

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how commission a transmitter evev plant is already running

2 Answers  

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can we replace a pressure transmitter of range 0 to 25 Kg/cm2 by a Pressure transmitter of range 0 to 10 Kg/cm2 ?.. Will it affect 4 to 20 mA output signal which we will feed to the PLC.

9 Answers   IOCL,

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what is the criteria to decide conductor size of a cable ?

0 Answers  

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