PLC from the basic to let you know it,plc cpu modules

PLC is a programmable logic controller, mainly used for the logic control, which is composed of a host and an input / output unit. The input and output is the main switch signal, programmable logic controller manufacturer has now developed a simulation signal; the main principle is to accept the input signal to the controller, according to certain logical relationship, the operation on the controller, and the output to the output unit.

In the user view, a detailed analysis of the internal circuit of CPU is not necessary, but the working mechanism of the various parts or should have the enough understanding. Control the CPU controller CPU, plc digital input module  ,explaining and executing command which reads the instruction.

Plc cpu

Since the 1960s, the United States launched a programmable logic controller (Programmable Logic Controller, PLC) to replace the traditional relay control system, PLC has been rapid development,cpu module plc has been widely used around the world. Meanwhile, the function of the PLC is also improved. With computer technology, signal processing technology, control technology continues to develop network technology and the continuous improvement of user requirements, PLC increased the analog processing and motion control functions on the basis of the amount of processing on the switch. Today's modular plc is no longer limited logic control, motion control, process control and other fields also play a very important role.
Programmable logic controllers initially only logic control circuit function, so was named the programmable logic controller, and later with the continuous development of these original features simple computer module already includes logic control, timing control, analog control Many of the features, such as multi-machine communication, the name was changed to the PLC (Programmable Controller), but because plc cpu modules is also shorthand for PC and PC (Personal Computer) shorthand for conflict, but also as a result of many years of usage, people or programmable logic controllers often use this title, and the term is still used in the acronym PLC.

Cpu modules plc

plc cpu module having a microprocessor digital electronic devices for digital logic controller automation and control, control commands can be loaded at any time within the memory storage and execution. By an internal programmable controller CPU, instruction and data memory, input and output units, power modules, modular plc, combined into a modular unit.
Widely used in the current field of industrial control. Prior to the programmable logic controller appears generally to be used hundreds of relays and automation systems in order to form a counter with the same functionality, but now, after the programming of simple programmable logic controller module has basically replaced these large devices. programmable plc controller system program is generally at the factory initialization is complete, users can edit their own according to their own needs appropriate user program to meet different requirements for automated production.