Traditional Culture Encyclopedia - Traditional festivals - Does plc replace the main circuit or the control circuit in electric drive?
Does plc replace the main circuit or the control circuit in electric drive?
The traditional control circuit of low-voltage apparatus can be controlled by plc, but PLC only replaces the control circuit of low-voltage apparatus control circuit, and the main circuit part of low-voltage apparatus control circuit needs to be kept.
The control loop of plc is generally provided by PLC with 24V, and the proximity switch determines when the motor rotates forward and backward. Output signal to relay. So as to control the forward and reverse main circuits. The main circuit is generally 380, which consists of transformer contactor and motor comprehensive protector.
control system
Generally speaking, for analog control, the controller determines the output according to the input and certain rules and algorithms, so that the input and output form a control loop.
The control loop can be divided into open loop and closed loop. Open-loop control loop means that the output depends on a reference quantity, and there is no direct relationship between input and output. The output of the closed-loop feedback control loop is used as the input of the loop and compared with the output value of the set value or quantity. Closed-loop control, also known as feedback control, is the most common control mode in control system.
- Previous article:Brief introduction of Lijiang ceramic art Lijiang traditional handicraft culture ceramic art
- Next article:Tianjin clay figurine Zhang
- Related articles
- Skiing video snowboarding teaching tutorial
- Why do sugarcane have to be baked?
- How to write the business scope of the snack business license?
- What kind of slingshot is good for Tsuge wood?
- NBA history 5 small forwards are who?
- Can Baosu be a health care product?
- How to separate protein from starch?
- The relationship between film and six major arts (sculpture, painting, music, dance, photography and drama)
- What is the main content of Liu Zehua's China's Royalism, Authoritarian Power and Chinese Society?
- How to type a handwritten newspaper form?