Abstract: A Programmable Logic Controller, PLC is a digital computer used for automation. It is an interface between program and the inputs. It is a programmable software. A PLC is an example of a real time application and therefore used to control various devices. The PLC works depending by the inputs given and their state, turning on/off its outputs. The user enters a program, usually through software which gives the results. PLC is used in many “real world” applications. For all application that needs some type of electrical signals, PLC works on the basis of inputs given by the user. Automation is used for all control systems and the technologies in PLC is use to reduce the human work and helps in increasing the production. PLC plays an important role in the world of automation industry . It acts a major function in the automation field which tends to reduce the complexity, increases safety and cost efficient. In this system we have applied a PLC based control system in an automatic bottle filling station.

Keywords: PLC, Bottle Replenishment, filling plant, Logixpro, SCADA, Bottle Capping, Automation, Damage detecting sensor.