Megmeet PLC - the hardware composition of PLC control

Fault three Fault phenomenon: There is a rebound phenomenon when the rotation starts Solution: 1. Set the start frequency P08.02 and start frequency time P08.03 appropriately (such as P08.02=P08.03=0.5) 2. Appropriately reduce the stator resistance (P03.07) and no-load current value (P03.11 ...

1) Hand arc welding (STICK) Shielded Arc Welding (abbreviated SMAW) in English, The principle is: the arc occurs between the coating electrode and the base metal, and the welding method of arc thermal ablation electrode and base metal is used. The outer layer of the electrode is covered with solder, which is dissipated in case of heat.

1. Sinusoidal pulse width modulation Sinusoidal Pulse Width Modulation (SPWM) is characterized by simple structure of control circuit, low cost, good hardness of mechanical characteristics, and can meet the smooth speed regulation requirements of general transmission, and has been widely used in various fields of the industry. However, this control ...

1. Use the analog output module of the PLC to control the inverterThe analog output module of the PLC outputs a 0-5V voltage signal or a 4-20mA current signal, which is used as the analog input signal of the inverter to control the output frequency of the inverter. This control method is simple to wiring, but requires the option to ...

The inverter is composed of a main circuit, a rectifier, a flat wave circuit, and an inverter. 1) Main circuit: The main circuit is the power conversion part that provides voltage regulation and frequency regulation power supply for the asynchronous motor, and the main circuit of the inverter can be roughly divided into two categories: the voltage type is the DC ...

1. Check the surrounding situation - carefully check the ventilation and lighting of the inverter and the surrounding environment. It is necessary to ensure that the ventilation equipment is functioning properly and that the lighting equipment is in working order. 2. Check the internal cable - open the inverter cabinet door and check whether the internal cable is damaged, the cable ...

With the rapid development of the machinery manufacturing industry, the traditional general machine tool can no longer meet the changing parts processing needs of the shopping mall. CNC machine tools have undeniably become the mainstream processing equipment of today's machinery manufacturing. In response to the special application needs of the machine tool industry, Megmeet has launched the MV series of high-function ...

1. The operating ambient temperature of the inverter (mainly refers to the air temperature of the air inlet of the power unit cabinet) requires a minimum ambient temperature of -5 °C and a maximum ambient temperature of 40 °C. In order to improve the reliability and extend the service life of the drive, check the following items: Air conditioning and refrigeration ...

1. Select the inverter according to the load characteristics A: Fans and pumps are the most common loads: the requirements for the inverter are the simplest, as long as the inverter capacity is equal to the capacity of the motor (air compressors, deep water pumps, sediment pumps, and fast-changing music fountains need to increase their capacity). ...

Sinusoidal Pulse Width Modulation (SPWM) control mode It is characterized by simple structure of control circuit, low cost, good hardness of mechanical characteristics, and can meet the smooth speed regulation requirements of general transmission, and has been widely used in various fields of industry. However, this type of control is at low frequencies, ...

Carbon dioxide gas shielded welding (referred to as CO2 welding) is the use of CO2 gas as the maintenance medium, during welding, CO2 gas is sprayed out through the nozzle of the welding gun, along the perimeter of the welding wire, forming a gas maintenance layer around the arc, mechanically isolating the welding arc and the molten pool from the air, and then avoiding ...

1. The ladder diagram language is the most commonly used programming language in PLC programming. The CPU reads physical input into a memory table, often referred to as an "input table". The form is evaluated for use in the procedure. Different platforms, using different types of registers; In each scan cycle, follow from left to right, ...

1. PLC is a relatively mature control system composed of single-chip microcomputer, which is the product of a mature and stable single-chip microcomputer application system that has been debugged. It is highly versatile. 2. The single-chip microcomputer can form a variety of application systems, and the application range is wider. In the case of a single "microcontroller", it ...

1. The role is different A PLC (Programmable Logic Controller) is an electronic system designed for digital operations in an industrial environment. The inverter is the application of frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor working power supply.

1. The circuit board inside the inverter belongs to precision electronic components, which needs to be moisture-proof and dust-proof, and the temperature and humidity are not too high, and cannot be installed on the bare wall, so the inverter should be installed in the middle of the control cabinet; The inverter should be installed vertically, and the installation should be avoided directly above and below ...

(1) Central Processing Unit (CPU) The central processing unit (CPU) is the control center of the PLC. It accepts and stores user programs and data typed from the programmer, checks the status of the power supply, memory, I/O and alert timer in accordance with the functions assigned by the PLC system program, ...

1. Grounding problems The grounding requirements of the PLC system are relatively strict, and it is best to have an independent dedicated grounding system, and it should also be noted that other equipment related to PLC should also be reliably grounded. When multiple circuit grounding points are connected together, unexpected currents can be generated, resulting in logic errors or ...

The first is relay output, the relay output response speed is slow, the output current is large, generally can reach 2A, but the electric shock life is short, the output frequency is low, the maximum is 1HZ; The second is transistor output, the transistor output response speed is fast, the output current is small, and the contact life is relatively small.

Precautions for maintenance of high-voltage inverters 1. Carefully monitor and record the display parameters on the man-machine interface of the inverter, and reflect the abnormality immediately 2. Carefully monitor and record the ambient temperature of the inverter room, and the ambient temperature should be between -5 °C and 40 °C. Phase-shifting transformers ...

Installation: The installation mode of PLC system is divided into centralized, remote I/O and distributed with multiple PLC networking. Centralized does not need to set up the drive remote I/O hardware, the system response is fast, and the cost is low; Remote I/O is suitable for large systems with a range of ...