PLC compared with other PLC’s control systems are adapted for a wide range of automation tasks. These are typical industrial processes in manufacturing where the cost of developing and maintaining an automation system is relatively high against the cost of automation, and where they will be changes in the system throughout its operational life. The PLC contains everything needed to handle high power loads, requiring little electrical design and the design problem centers on expressing the operations and sequences in the ladder logic (or diagrams of functions). PLC applications are typically tailored to the system, so the cost of the PLC is low compared to the cost of hiring the designer to a specific design that will be used only once.On the other hand, in case of high production, control systems are amortized as themselves quickly due to savings in components, which causes that might be a good choice rather than a solution “generic”.However, it should be noted that some PLC no longer have a high price. The current PLC have all the capabilities for a few hundred dollars. Different techniques are used for high volume or a simple task automation, for example, a household washing machine can be controlled by an electromechanical cam timer costing some few dollars in production quantities. A microcontroller-based design may be appropriate where hundreds or thousands of units must be produced and then the development cost (design of power supplies and equipment inputs and outputs) can be divided into many sales where the end user does not have need to alter the control.Automotive applications are an example, millions of units are sold each year, and few end-users alter the programming of these controllers. (However, some specialty vehicles such as passenger trucks to urban transit using PLC drivers instead of our own design, because the volumes are small and development is not economic.) Some complex control processes, such as those used in the chemical industry, may require algorithms and features beyond the capacity of high-level PLC. High-speed controllers also require customized solutions, eg for aircraft controls. PLCs may include logic to implement loops analog “proportional, integral and derivative” or a PID controller. A PID loop could be used for temperature control of manufacturing processes, for example.Historically PLCs were usually configured with only a few analog control loops and where processes required hundreds or thousands of loops, a distributed control system (DCS) is responsible. However, PLCs have become more powerful, and the differences between between DCS and PLC applications has become less clear. In short, the areas of application of a PLC or PLC in industrial processes are when there is a confined space when production processes are changing periodically when there are sequential processes, where the processing machinery is variable, when the facilities are complex and comprehensive process, when the check is centralized programming in parts of the process. General Applications are: machine maneuver, maneuver and control facilities and signage.