FBM241C FOXBORO

In addition,in discrete event systems,such as highway network traffic flow(vehicle counting,passenger counting,and residence time measurement),logistics systems,flexible manufacturing systems(agile manufacturing systems),and all non-standard on-demand service systems,PLC can be used to model,take countermeasures,and optimize.The future of PLC is promising,and all pessimistic arguments are untenable.As for technological progress,it will take some time for PLC to integrate with other technologies and even disappear!

Programmable logic controller is a digital operation electronic system designed specifically for application in industrial environments.It adopts a programmable memory that stores instructions for performing logical operations,sequential control,timing,counting,and arithmetic operations internally.It controls various types of mechanical equipment or production processes through digital or analog input and output

Programmable Logic Controller(PLC)is a digital arithmetic controller with a microprocessor for automation control,which can load control instructions into memory at any time for storage and execution.The programmable controller consists of functional units such as CPU,instruction and data memory,input/output interface,power supply,and digital to analog conversion.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

unctions,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 habitual 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

origin

The development of production technology requirements in the American automotive industry has promoted the emergence of PLCs.In the 1960s