First, the subject is different
1, PLC: digital electronic equipment with microprocessor.
2, CPU: the computing and control core of the computer system, is the final execution unit of information processing and program operation.
Second, the role is different
1, PLC: digital logic controller for automatic control, control instructions can be loaded at any time in memory storage and execution.
2, CPU: mainly interprets computer instructions and processes data in computer software. CPU is the core part of the computer that is responsible for reading instructions, decoding instructions and executing instructions.
Three, different characteristics
1, PLC: by the internal CPU, instruction and data memory, input and output unit, power module, digital analog and other units modular combination.
2, CPU: CPU is the core hardware unit for all hardware resources of the computer (such as memory, input and output units) to control deployment and perform general operations