Answer / h v k kumar mtech,instrumentat

micro controllers used for specific task only and it cant
accept analog inputs directly.using plc we can control more
micrcontrolled based control loops.

Answer / tasweer hussain

PLC is special micro controller designed for industrial
applications.A micro controller is a microprocessor that
can be used for any type of application
the bais difference between PLC & U.Controller is the way
of progarmming languages

Answer / as a friend

micro controller is used for only particullar programming
but plc reprogrmmable device very easy to handle very easy
to reprogram it.

Answer / jasmine

PLC is a special microcontroller designed for industrial applications.It is for controlling processes or machineries.Microcontroller is a microprocessor which can be used for any type of application.PLC internally uses a microcontroller to handle all inputs,outputs & logical scans.Microcontrollers are cores which can do anything you program them to do.The basic difference between the two is only the way of programming.

Answer / maheshwaran

In inside the industry the temprature, pressure, voltage, current everything should be high, a normal microcontroller cant withstand these all things, so instead of that plc is used. The plc can withstand any temprature pressure anything, and also the plc can contain many number of inputs and outputs, and it can be expandable.

Answer / faraj faizal

In PLC long distance communication is possible but in micro-controller its difficult chance of fault occurrence is high. In PLC troubleshooting is easy than micro-controller. reprogramming in PLC is comparatively easier than micro-controller programming.

Answer / waseem

microcontroller cannot be used at large scale so plc is used.
( 2)ladder language is quite simple
(3)plc can be easily reprogrammed than microcontroller

Answer / ahmed hassan

Sorry but the question seems to be General the question could be in what application i have to choose ucontroller or PLC ? first we have to understand each one ,PLC structure is based on a uprocessor or a ucontroller it is fully isolated and taking into account the high precision in electronic Design fabrication which is different from one Brand to another also the type of core controller indicates the speed and the arthamtics that can be handeled by the plcs and also the enviroment resistance the PLC have different IP grades(the system electrical isolation to withstand water and dust) depending on the product manufacturer and quality of packaging , PLC software is based on logic(ladder) but most of the manufacturers implented some fuctions that can access the controller memory and the Arithmatical logical units(Alus) to be able to make some arithmatical calculations .the core processor have very high speeds (ucontroller & uprocessor based) but the output could be less speed depending on type of output interface if it is mechanical relays it is limited in speed if it is ssr (solid state relay) it could reach very high speeds in micro-seconds.
what is u-controller? it is a microprocessor integrated with ram rom and some other prephirals we could say it is a very small computer on chip with a limited prephirals there are a huge various types and models of microcontroller each of them have a unique straucture which specifyies the abilities of each controller Ex. 8bit ,16bit,24bit ,32 bit ucontrollers which indicates the basic structure of the controller registers width, ucontroller excute and respond in a very high speeds could reach 10 ns in some products , ucontroller can handel most of arthmatical based operations. the microcontroller can't stand alone it must have an electrical circuit with taking in considration all the circuit design bases and isolatons to have an end product with less errors
.in what applications i can choose ucontroller or PLC ? both are needed in industry but if you need a switching device with a moderate level of control system in less time your choise is PLC if you need to have a high level of control you have to choose a microcontroller solution with taking in consideration all the needed cicuit designs and the packaging system to be able to have a stable enviroment resistant system . Hope to be helpful

Answer / arunnatraj

A PLC is a special microcontroller designed for industrial
use, that is for controlling machinery or processes.
Usually a PLC is programmed using Ladder diagrams and
specialized control software. A microcontroller is a
microprocessor that can be used for any type of
application, but there some for special applications, like
a PLC.

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