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In addition, due to the above professional characteristics, industrial control computers at the same level are more expensive than ordinary computers in terms of price, but generally not much different.

The disadvantages of industrial control computers Although they have unique advantages compared to ordinary commercial computers, their disadvantages are also very obvious – poor data processing capabilities, as follows:

1) Configure a small hard disk capacity;

2) Low data security;

3) Low storage selectivity.

4) Higher prices

The English name for programmable logic controller is Programmable Logic Controller, which was abbreviated as PC in the 1970s and 1980s. Due to the development of personal computers, also known as PCs, in the 1990s; In addition, the concept of programmability covers a wide range, so AB Company in the United States named the programmable controller PLC Programmable Logic Controller for the first time. For convenience, PLC is still referred to as a programmable controller

Some people refer to the system composed of programmable controllers as the PCS programmable control system, emphasizing that the manufacturer of programmable controllers has already provided a complete system to people.

In 1968, General Motors of the United States proposed the requirement to replace relay control devices. The following year, Digital Corporation of the United States developed the first generation programmable controller, which met the requirements of GM’s assembly line.