27-01-2009, 09:25 AM
INTRODUCTION :-
PLC is a digitally operating electronic apparatus which uses a programmable (through dedicated language such as Relay Ladder Programming) memory for the internal storage of instructions for implementing specific functions such as logic, sequencing, timing, counting and arithmetic to control through digital or analog input output modules, various types of machines and processes.
The programmable controllers (PC) have developed as the heart of the automation of the industries. The PCs offer a number of advantages over the conventional relay control logic in many aspects like reliability, repeatability, programmability, compact design etc. Small controllers play an important role in the automation where such controllers are implemented in huge and complicated processes and plants. In such situations the communication among the PCs is of vital importance along with other aspects.
TYPICAL SPECIFICATIONS OF THE PROJECT :-
1. Main module based around 8031 microcontroller.
2. 16 digital Inputs and digital outputs with proper isolation and signal conditioning.
3. Twenty-five hex keyboard and 7-segment display interface.
4. Closed loop PI controller for DC motor of 20 HP.
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