Blog
What are the application fields of PLC
18

Oct

PLC programmable controller is an electronic device designed for digital operation and operation specially designed for application in an industrial environment.


It uses a memory that can be programmed to store instructions for performing logical operations, sequential operations, timing, counting, and arithmetic operations, and can control various types of operations through digital or analog input and output. Machinery or production process. PLC and its related peripheral equipment should be designed according to the principle of being easy to form a whole with industrial control system and easy to expand its functions.

At present, PLC programmable controllers have been widely used in various industries such as steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automobiles, textiles, transportation, environmental protection, culture and entertainment at home and abroad. The usage can be roughly summarized as follows Several categories.


1. Logic control of switch

   This is the most basic and most extensive application field of PLC. It replaces the traditional relay circuit to realize logic control and sequence control. It can be used for the control of a single device, and can also be used for multi-machine group control and automated assembly lines. Such as injection molding machines, printing machines, book-stapling machinery, modular machine tools, grinders, packaging production lines, electroplating lines, etc.


2. Analog control

  In the industrial production process, there are many continuously changing quantities, such as temperature, pressure, flow, liquid level and speed, etc., which are all analog quantities. In order for the programmable controller to process the analog quantity, it is necessary to realize the A/D conversion and D/A conversion between the analog quantity (Analog) and the digital quantity (Digital). PLC manufacturers all produce supporting A/D and D/A conversion modules, so that programmable controllers can be used for analog control.

3. Motion control

   PLC can be used for circular motion or linear motion control. In terms of control mechanism configuration, the switch value I/O module was directly used to connect the position sensor and the actuator in the early days, and now a dedicated motion control module is generally used. Such as single-axis or multi-axis position control modules that can drive stepper motors or servo motors. Almost all the products of major PLC manufacturers in the world have motion control functions, which are widely used in various machinery, machine tools, robots, elevators and other occasions.

4. Process control

   Process control refers to the closed-loop control of analog quantities such as temperature, pressure, and flow. As an industrial control computer, PLC can compile various control algorithm programs to complete closed-loop control. PID adjustment is the most commonly used adjustment method in general closed-loop control systems. Large and medium PLCs have PID modules, and many small PLCs also have this functional module at present. PID processing is generally to run a dedicated PID subroutine. Process control is widely used in metallurgy, chemical industry, heat treatment, boiler control and other occasions.


5. Data processing

  Modern PLC has functions such as mathematical operations (including matrix operations, function operations, and logic operations), data transmission, data conversion, sorting, table lookup, bit operations, etc., which can complete data collection, analysis and processing. These data can be compared with the reference values stored in the memory to complete certain control operations, or they can be transmitted to other smart devices using the communication function, or they can be printed and tabulated. Data processing is generally used in large-scale control systems, such as unmanned flexible manufacturing systems; it can also be used in process control systems, such as some large-scale control systems in the papermaking, metallurgy, and food industries.

6. Communication and networking

   PLC communication includes communication between PLCs and communication between PLCs and other intelligent devices. With the development of computer control, the factory automation network has developed rapidly, and each PLC manufacturer attaches great importance to the communication function of PLC, and has launched their own network systems. All newly produced PLCs have a communication interface, which makes the communication very convenient.


Amikon know that finding the right part quickly is critical to keeping your line running. That is why we offer same day shipping for in-stock parts.

IC693CPU364

GE

6ES5470-4UC12

SIEMENS

IC693MDL231

GE

6ES5454-4UA13

SIEMENS

IC693MDL645

GE

6ES5434-4UA11

SIEMENS

IC694APU300

GE

6ES5312-3AB32

SIEMENS

IC694MDL645

GE

6DS1717-8RR

SIEMENS

IC694PWR321

GE

6DS1332-8RR

SIEMENS

IC694PWR321

GE

6DS1213-8AA

SIEMENS

IC697ALG320

GE

6DD2920-0AQ0

SIEMENS

IC697BEM733

GE

6DD1683-0BE0

SIEMENS

IC697CPU731

GE

6DD1681-0AE2

SIEMENS

IC697CPM915

GE

6DD1660-0AE0

SIEMENS

click here to leave a message

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Home

Products

about

contact