2500-C200 CTI

In the early days, programmable logic controllers only had the function of logical control, so they were named programmable logic controllers. Later, with continuous development, these computer modules with simple functions had various functions, including logic control

timing control, analog control, multi machine communication, and so on. The name was also changed to Programmable Controller, However, due to the conflict between its abbreviation PC and the abbreviation of Personal Computer, and due to customary reasons, people still often use the term programmable logic controller and still use the abbreviation PLC

The programmable logic controller used in industry is already equivalent to or close to the mainframe of a compact computer, and its advantages in scalability and reliability make it widely used in various industrial control fields. Whether in computer direct control systems

centralized decentralized control systems DCS, or fieldbus control systems FCS, there is always a widespread use of various types of PLC controllers. There are many manufacturers of PLC, such as Siemens, Schneider, Mitsubishi, Delta, etc. Almost all manufacturers involved in the industrial automation field will provide their PLC products

The development of production technology requirements in the American automotive industry has promoted the emergence of PLCs. In the 1960s, General Motors found it difficult to modify relay and contactor control systems, with large volume, high noise, inconvenient maintenance, and poor reliability when adjusting factory production lines. Therefore, the famous “General Ten” bidding index was proposed.