Programmable Logic Controller Programming
PLC is a programmable controller. We can create logic through programming to control a system. Their are several types of programming languages or strategies that can be followed. Some of them are :-
- Ladder Logic : Ladder logic is also known as Ladder diagram. It is basically a graphical representation of relay logic circuit, which consists two vertical parallel lines connected by horizontal lines. This lines are called rail and rungs. the vertical line works to supply power, and the vertical line is responsible for creating logic.
- Function Block Diagram : Function Block Diagram(FBD) in PLC programming is a graphical representation of control logic. It uses function blocks to depict operations, such as comparisons or timers, with inputs and outputs conducted by lines. Contacts and coils symbolize input conditions and output actions. Branches and junctions control logic flow. For instance, motor control system FBD might include a start or stop button, a motor and a control relay illustrating the interconnection of these components in a visual and intuitive format for programming complex control algorithms.
What is a Programmable Logic Controllers (PLC)
PLC stands for Programmable Logic Controller which was invented in automobile manufacturing to provide a flexible, rugged, and easily programmable controller to automate a system in the year of 1964 by Dick Morely. That’s why he is called as father of PLC. The first PLC was Medicon 084. These PLCs were large, expensive, and not easy to maintain and program. That’s why in the next generation it was upgraded to medium and small size PLCs. It is a hardware device with microprocessor-based control system. PLC is a general-purpose computer modified specially to perform control tasks. It is used for industrial automation to automate a specific process, machine function, or even entire production. PLCs are developed for electronic replacement for hard-wired relay logic circuit systems for machine control. They are designed for industrial use to control many automated processes in industries.
In this Article, We will go Through what is a Programmable Logic Controller and how a programmable logic controller works, We will go through Different types of PLC, Then we will proceed with PLC programming Examples and see industrial PLC programming examples, At last, we will conclude our Article with its Applications, Advantages, Disadvantages and Some FAQs on PLC.
Table of Content
- What is a Programmable Logic Controller (PLC)?
- Use of PLC
- Components of PLC
- Structure Of PLC with diagram
- Working of PLC controller
- Types of PLC
- Applications of PLC