PLC BASED RATIO CONTROLLER AND MATERIAL DISTRIBUTION SYSTEM

Automation in an industry using programmable logic controller (PLC) can be enumerated by optimizing the use of process control equipment, decreases the response time for process and equipment contingencies, provides information about process status, manages process logic at the plant floor level and increases overall productivity and plant efficiency. The primary reason for designing such a system is to eliminate large cost involved in replacing complicated relay based machine control system & to reduce process time. Ratio control system is feed forward system where one variable is controlled in ratio to another to satisfy some higher level objectives. Two difference chemicals are supplied from different tanks in proper ratio by maintaining the flow of quantity. Then desired mixture is obtained &checks the ratio of composition if any unbalanced, controlled by controlled values of supply tanks. Then this mixture is distributed as per requirements. In Industries for ten machines, total cycle time with existing PLC based system is 75 sec. But our modified PLC based system total cycle time is improved as 45 sec. Hence total reach time of distribution system is improved.