Implementation OF irrigation Process using embedded PLC

A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, light fixtures or amusement rides. PLCs is basically the delegation of human control function to technical equipment for increasing productivity, increasing quality, reducing cost, increasing safety in working condition. Unlike general purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immune to electrical noise and resistance to vibration and impact. Programs to control machine operation are typically stored in battery backed- up or non-volatile memory. A PLC is an example of a hard real time system since output results must be produced in response to input conditions within a limited time, otherwise unintended operation will result. The development of the embedded PLC is proposed here with the combination of the LabVIEW software and the ARM Microcontroller. The flexibility of the proposed PLC makes it relatively easy and less costly. The ARM microcontroller is selected to develop embedded PLC because it is widely used across many embedded designs due to its low price, low power consumption, and wide variety of peripherals for many of the major silicon vendors. In addition, the LabVIEW Embedded Module for graphical programming to ARM microcontroller is used with the application of irrigation system for water sprinkling in agriculture field.