what is plc used for?PLC is a digital operation electronic system designed specifically for use in industrial environments.It uses a programmable memory to store instructions for performing logical operations,sequential control,timing,counting and arithmetic operations,and controls various types of mechanical equipment or production processes through digital or analog input and output.It is mainly used for sequential control,process control,motion control,data processing,communication and networking,and is a very important device in the field of automation.
Sequential logic control：
This is the most basic and widely used application field of PLC,which is used to replace the relay control system to realize logical control and sequential control.It can be used for single machine control or multi-machine control,and can also be used for the control of automated production lines.PLC controls the mechanical moving parts to perform corresponding operations according to the command signals and sensor signals given by the operation buttons,limit switches and other on-site.
Process control：
PLC can receive continuously changing analog quantities such as temperature,pressure,flow,etc.,and realize the conversion between analog and digital quantities through analog I/O modules,and implement closed-loop PID control on the controlled analog quantities.
Motion control：
Many PLC manufacturers have provided single-axis or multi-axis position control templates for dragging stepper motors or servo motors.In most cases,the PLC sends the data describing the target position to the template,and the template moves one or several axes to the target position.When each axis moves,the position control template maintains the appropriate speed and acceleration to ensure smooth movement.This function is currently used to control centerless grinding,stamping,complex parts segmented blanking,rolling,grinding and other applications.
Data processing：
Most PLCs have different degrees of data processing functions,such as F2 series,C series,S5 series PLCs,etc.,which can complete data operations(such as addition,subtraction,multiplication,division,exponentiation,square root,etc.),logical operations(such as word AND,word OR,word XOR,negation,etc.),shifting,data comparison and transmission,and numerical conversion operations.
Communication and networking：
At present,most PLCs have communication capabilities.PLCs are used as slave computers to communicate with master computers or PLCs of the same level to complete information exchange and realize information control and management of the entire production process.Therefore,PLCs are ideal controllers for factory automation.
Since PLCs are designed for industrial environments,their main characteristics are that they are very reliable and have strong anti-interference capabilities;
High-quality components are selected for hardware,and a reasonable system structure is adopted to strengthen and simplify installation,making it resistant to vibration and shock.
Extremely strict process measures are taken for the design,processing and welding of printed circuit boards.
For the most common instantaneous strong interference in industrial production processes,the measures taken are mainly isolation and filtering technologies.
The software also has a good self-diagnosis function,and an alarm will be issued immediately if an abnormality occurs;
Secondly,the hardware is complete,small in size,and low in energy consumption;the design,construction,and debugging cycle are short;
Now PLC is widely used in industrial automation,building automation,transportation logistics,agricultural automation,energy management,etc.;
Unimat has been focusing on industry automation for 20 years,and its production lines cover PLC,HMI,Internet of Things,inverters,and servos,with good quality,affordable prices,3-year warranty,and professional training.The company has a strong R&D team,welcome to inquire and visit our factory.
