The Programmable logic controller (PLC) aim will enable to Basic knowledge of PLC PLC input/output modules PLC input /output functions PLC Timer functions PLC Counter functions construction of PLC Ladder diagram PLC Programming basic examples PLC- industrial application problem PLC software used RS Logix 500 (Rockwell software) Additional Problems using Timer and counter Boolean Algebra Mechatronics system Design Different 12 case studies on different industrial application using PLC programming with usage of RS Logix 500 (Rockwell software) in addition to this content focused on Supervisory control and Data Acquisition (SCADA) Also heighted on Micro-electro Mechanical System (MEMS)There different five chapter has included with certain objective like-- Understand and learn about automation control systems - Learn about the types PLC functions, construction of Ladder Programming ,with assuage of RS Logix 500 (Rockwell software)- Case studies tells about different application of PLC which used in Industry.