1. Structure is different
PLC is built on a microcontroller on top of the product, microcontroller is an integrated circuit.?
2. Different uses
Microcontroller can constitute a variety of applications, from micro, small to medium and large can be, PLC is a special case of microcontroller application system.?
3. Different principles
Different manufacturers of PLC has the same working principle, similar functions and indicators, there is a certain degree of interchangeability, quality assurance, programming software is moving towards the direction of standardization. This is the basis for PLC to be widely used.
In contrast, microcontroller applications are of varying quality and difficult to learn, use and maintain.
Extended information:
Monolithic machine, also known as monolithic microcontrollers, is not a chip that accomplishes a particular logical function, but rather a computer system integrated into a chip
Equivalent to a miniature computer, and compared to computers, microcontrollers are only missing I/O devices.
In a nutshell: a chip becomes a computer. Its small size, light weight, inexpensive, for learning, application and development to provide a convenient condition. At the same time, learning to use a microcontroller is the best choice to understand the principles and structure of the computer.
References:
Microcontroller_Baidu Encyclopedia
PLC_Baidu Encyclopedia