Modification of Auto Light Controlled System by PLC

Automatic control is very profitable for our society. Some advantage is save energy, save time, save money, save physical effort, increase life of machine etc. For this process used PLC. These concepts can use various sector. For example: Auto light control of a room, AC control of a seminar or conference room, control of a cold storage, machinery in an industry etc. A Programmable Logic Controller is a latest intelligent instrument that is used widely in different industrial sector for automatically control with decreasing plants break down times as well as its maintenance costs and increasing both of quality and quantity of productions. Comparing its performance with other conventional control for industrial automation, its price is lower. But its programming and installation cost is still higher. Nowadays automatic control is widely used in different industrial plants like power plant, different chemical process plant, paper mills, textile mills, sugar mills, water treatment plant, food processing plant, steam generation plant, and all most of industrial plant.