defination of plc? why we use plc? application of plc?
advantage of plc?
Answer Posted / eswar
PLC is a small computer used for automation of real world
process such as control of machinery on factory assembly
lines.where older automated systems would use hundreds or
thousands of relays,a single PLC can be programmed as a
replacement.
example maintaining of water level in a tank between two
float switches by opening or closing an electric valve.
In this example plc accepting two digital inputs from two
float switches.The plc controlling a single digital output
to actuate the inlet value valve into tank.
advantages:
1 flexibility:one single Plc can easily run many machines
2with plc we can do any changes in circuit design and we can
correct the errors.
3 pilot running
4 visible observation
5 space efficency: todays plc's have more memory therefore
we can generate more and more contacts timers,coils,counters.
Is This Answer Correct ? | 46 Yes | 8 No |
Post New Answer View All Answers
how to rectify the poor signal strength in utrasonic digtial flow meter ,model:ge digital xce868i
How works weighfeeders in cement industry? what is the working principle?
i want formula for flow control.am doing project in flow control using orifice . i know value of the flow level(Q) . upstream(p1) pressure, orifice diameter(Do) , pipe diameter(Di) and oil viscosity(Vi) how can i calculate downstream pressure
what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .
What is hp & mp seperator .& what is its working principle ?
how many types of spped sensors n vibration sensors?their basic principle n connection?
Can any one tell me what type of question asked for instrumentation and control interview panel??? pls mail ramashankar.goel@gmail.com
Instrument QA/Qc what is the project quality plan?conduit inspection RFI. which documents attache with package?
can u briefly explain aboutan aryton shunt multirange DC ammeter?
what is the calibration procedure for transweigh make weigh feeder?
How does temperature bath work? How does coil gets heated only by applying some current?
hii my name is sujith...i am preparing for HPVL GET 2010... so ,,,pls help me by send any previous questions or material to my site.....(Msujith_12@in.com) thank q
what would be the minimum flow rate that we can measure on rotameter..?
what is wave length were using ?
what is o2 analyzer and how it measured ,what is the role of this analyzer in cfbc boiler...