what is plc? Basic function of plc? application of plc in
industry? What is lader diagram ? What is the main advantage
to use plc in industry?
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Answer Posted / ankit arora
ladder programming is a language . ladder language is a
combination of input contacts and output coils for make a
logic programm.
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Do you have reference list?
Reason for capillary type dp level transmitter fluctuation
Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =
If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?
For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?
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any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.
all questions related to instrument technician in any offshore oil and gas company.
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this site is owned by an nonsense
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give eg of how I/P is used in control loops
In dcs panel we are using diff type of modules ?what is module ? what is the use of modules ?diff type of module?
