The PLC main usage profile application field

The current PLC at home and abroad has been widely used in steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automobile, textile, transportation, environmental protection and cultural entertainment and other industries. Are mainly in yuncheng power plant chemical water, sewage treatment, industrial wastewater treatment, the condensate fine treatment, etc. About the usage of PLC controller mainly divided into the following categories. 1 switch switch is one of the most common electronic components, function is on and off of the circuit. Through to the electric current can pass, and current to pass. Among various kinds of electronic equipment, household appliances can see the switch. PLC can easily replace the traditional relay logic control. Relay is a common control equipment in our life, common sense is the switch, closed or open in the case of a condition is met. Relay switch features in many control systems, especially discrete control has been widely used in the system. From another perspective, due to the use for a particular purpose design of electronic circuits, and ultimately more or less need to interact and some mechanical equipment, so the relay also have electronic equipment and machinery equipment interface effect. Circuit, realize logic control, sequence control, can be used in a single device control, also can be used in many machines. Such as pump start-up, valve switch, sequence control system of water system, dry ash handling system, etc. 2 industrial process control in industrial production process, there are some, such as temperature, pressure, flow, liquid level and speed of continuous change of measure, The analog) And PLC controller adopts corresponding A/D and D/A conversion module and A variety of control algorithm to process the analog program, complete the closed-loop control. PID3 motion control PLCC4 data processing PLCC with math ( Including matrix operations, functions, operation and logic operation) , data transmission, data conversion, sorting, look-up table, and other functions, can complete data collection, 5 communications and networking PLCC communication with the communication between PLC and the communication between PLC and other smart devices. With the development of factory automation network, now of the PLC controller has a communication interface, communication is very convenient.
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