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What is PLC?

Last Update Time: 2019-06-11 14:53:17

Programmable Logic Controller(PLC) is a digital computing operation electronic system specially designed for application in industrial environments. It uses a programmable memory that stores instructions for performing operations such as logic operations, sequence control, timing, counting, and arithmetic operations, and controls various types of mechanical equipment or production through digital or analog input and output. process.

Basic structure: power supply, central processing unit CPU, memory, input unit, output unit

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Working principle: When the programmable logic controller is put into operation, its working process is generally divided into three stages, namely, input sampling, user program execution and output refresh. Completing the above three phases is called a scan cycle. During the entire run, the programmable logic controller's CPU repeatedly performs the above three phases at a certain scan speed.


The hardware of the PLC controller itself adopts the building block structure, with motherboard, digital I/O template, analog I/O template, special positioning template, barcode identification template and other modules. Users can expand on the motherboard as needed. Or use the bus technology to equip the remote I/O slaves to get the desired number of I/Os.


While implementing various I/O controls, the PLC also has the ability to output analog voltage and digital pulses, enabling it to control a variety of servo motors, stepper motors, variable frequency motors, etc. that can receive these signals, plus a touch screen. With human-machine interface support, Schneider's PLC can meet your needs at any level of process control.


If you want to know more, our website has product specifications for PLC, you can go to ALLICDATA ELECTRONICS LIMITED to get more information