LDGRB-01 3BSE013177R1 ABB

PLC first appeared in the United States in the late 1960s,with the purpose of replacing relays,performing sequential control functions such as logic,timing,and counting,and establishing a flexible program control system.It was officially named and defined in 1976:PLC(Programmable logic Controller)is a special electronic computer for digital control,which uses programmable memory to store instructions,performs functions such as logic,sequence,timing,counting and arithmetic,and uses analog and Components such as digital input and output to control various machinery or work procedures.After more than 30 years of development,PLC has been very mature and perfect,and has powerful computing,processing and data transmission functions.

PLC于20世纪60年代末期在美国首先出现，目的是用来取代继电器，执行逻辑、计时、计数等顺序控制功能，建立柔性程序控制系统。1976年正式命名，并给予定义：PLC（ProgrammablelogicController）是一种数字控制专用电子计算机，它使用了可编程序存储器储存指令，执行诸如逻辑、顺序、计时、计数与演算等功能，并通过模拟和数字输入、输出等组件，控制各种机械或工作程序。经过30多年的发展，PLC已十分成熟与完善，并具有强大的运算、处理和数据传输功能。