DI801 3BSE020508R1 ABB

The English name of the programmable controller is ProgrammableController,which has been referred to as PC for short in the 1970s and 1980s.Due to the development of personal computers in the 1990s,also referred to as PC;and the concept of programmable logic covers too much,so American AB company named the programmable logic controller for the first time as programmable logic controller(PLC-Programmable Logic Controller),for the sake of convenience,PLC is still referred to as programmable logic controller.Some people call the system composed of programmable logic controllers PCS programmable control system,emphasizing that what programmable logic controller manufacturers provide to people is already a complete system.

可编程序控制器的英文为ProgrammableController，在二十世纪70-80年代一直简称为PC。由于到90年代，个人计算机发展起来，也简称为PC;加之可编程序的概念所涵盖的范围太大，所以美国AB公司首次将可编程序控制器定名为可编程序逻辑控制器(PLC-ProgrammableLogicController)，为了方便，仍简称PLC为可编程序控制器。有人把可编程序控制器组成的系统称为PCS可编程序控制系统，强调可编程序控制器生产厂商向人们提供的已是完整的系统了。