What is a plc integrated machine? Who can tell me?

As computer hardware, it is generally composed of CPU, memory and input/output interfaces. Similarly, as an industrial control computer, PLC also has the above three parts. For large PLC, the above three parts are independent modules, connected by bus backplane, with powerful functions and flexible configuration; For small PLC, due to the single functional requirements, the above three parts are often assembled together, thus forming the so-called PLC all-in-one machine.