The programmable logic controller or commonly known as PLC is a specialized computer logic program that is used to control processes and machines. It shares common terms with traditional personal computers like memory, a central processing unit, communications, and software.
Not like personal computers though, the PLC is designed to survive the brutal and rugged industrial environment and at the same time be very flexible in how they interact with inputs and outputs in the real world. The parts that make a programmable logic controller work can be divided into different core areas.
The rack and power supply, the CPU or central processing unit, and the I/O or input and output section. PLCs come in many sizes and shapes. There are some PLCs that are too small, and they can fit in your shirt pocket. PLCs that are more involved in controlling systems will require a more massive rack.
Smaller programmable logic controller, also known as bricks, is designed with a fixed input and output points. For our consideration, we will look at the more modular rack-based PLC system. It is called modular because they can accept a lot of different types of input and output modules that can slide into the rack and instantly plugin. If you want a thorough explanation on how PLC works, you can always check PLCs for dummies and other materials found on the internet.
Rack and power supply
Let us start by removing all of the modules which will leave us with a naked programmable controller with only the rack and the power supply. The frame is a part that will hold every component together. Depending on the control system’s needs, it can be ordered in different shapes and sizes to carry more modules effectively.
Like a spinal column in a human body, the … Read the rest