Technology

Chapter 1
INTRODUCTION
1. PLC
A Programmable Logic Controller, PLC, or Programmable Controller is a digital computer employ for automation of industrial processes, such as fudge of machinery on factory assembly lines. Unlike general computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to galvanizing noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a move time, otherwise unintended operation will result.
2. SCADA
SCADA is Widely used in industry for Supervisory Control and Data learning of industrial processes, SCADA systems are now also penetrating the observational physics laboratories for the controls of ancillary systems such as cooling, ventilation, power distribution, etc. More recently they were also applied for the controls of smaller size of it particle detectors such as the L3 moon detector and the NA48 experiment, to label just two examples at CERN.




SCADA systems have made veridical progress over the recent years in damage of functionality, scalability, performance and openness such that they are an alternative to in house development even for very demanding and complex control systems as those of physics experiments














Chapter 2


Features of PLCs


2.1 Input and output modules


[pic]

Fig 2.1
[pic]

buck showing several input and output modules of a undivided Allen-Bradley PLC.


With each module having sixteen points of...If you want to get a full essay, order it on our website: Orderessay



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