Megmeet PLC - Introduction to the basic structure of PLC controller

(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. The inverter must be selected correctly. 2. Read the product manual carefully, and wiring, installation and use in accordance with the requirements of the manual. 3. The inverter device should be reliably grounded, and the radio frequency interference should be suppressed to prevent the inverter from causing electric shock due to leakage. 4、 ...

(1) The energy density is highly concentrated, the heating and cooling speed is extremely fast during welding, the heat affected zone is small, and the welding stress and deformation are very small; (2) Non-touch processing, no external force on the weldment, suitable for welding parts that are difficult to touch; (3) The laser can be transmitted through the optical incoming ...

1. The Megmeet rectifier module is damaged It is usually caused by grid voltage or internal short circuit. In the case of sweeping the internal short circuit, the rectifier bridge is replaced. When dealing with faults on site, we should focus on checking the status of the user's power grid. Such as the power grid voltage, whether there is an electric welding machine, etc.

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 ...

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 ...

The inverter should be installed inside the control cabinet, and the design of the control cabinet should pay attention to the following issues: 1. Wiring specification of inverter The signal line and the power line must be separated: When using an analog signal to remotely control the inverter, in order to reduce the interference of the analog signal to equipment such as the inverter, ...

1) Hand arc welding (STICK) Shielded Arc Welding (abbreviated SMAW) in English, The principle is: the welding method of generating an electric arc between the coating electrode and the base metal, and using the arc heat to melt the electrode and the base metal. The outer layer of the electrode is covered with solder, and it melts when heated.

21。 The unit is overheating The radiator in the unit is equipped with a temperature switch (normally closed point), and when the temperature exceeds 85°C, the normally closed point of the temperature relay is disconnected, and the unit is overheated and faulty. Check whether the cabinet top fan is working properly, whether the unit cabinet fan switch is tripped, and whether the filter screen is blocked.

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 ...

The EhaveCM350AR is a fully digital inverter melting multi-functional industrial heavy-duty Megmeet welding machine launched by Megmeet for global metalworking manufacturing. It brings customers higher quality and higher efficiency welding experience and value with excellent arc characteristics, reliability and high efficiency, and helps customers ...

Today's electronics industry revolves around high-speed communication and supercomputing on the Internet, and the requirements for electronic products are getting higher and higher. A large number of micro-precision electronic products are constantly testing the response speed and level of major enterprises in the market. Electronics manufacturers perform real-time, accurate ...

Preface: Energy security is an overall and strategic issue related to the country's economic and social development, and is crucial to the country's prosperity and development, the improvement of people's lives, and the long-term peace and stability of society. For the first time, the 14th Five-Year Plan and the Outline of the Long-Range Objectives Through 2035 include "comprehensive energy production capacity" in the ...

1. The motor runs differently in both directions Cause of failure: The phase of the brushless motor is wrong; The deviation potentiometer is in the wrong position. Solution: Detect or detect the correct phase; Reposition the potentiometer. 2. The motor speed is abnormal Cause of failure ...

1。 How do you distinguish between heavy and light failures? When the fault is light, the system sends out an alarm signal, and the fault indicator flashes. When a major fault occurs, the system issues a fault indication, and the fault indicator is always on. At the same time, a command is issued to break the high voltage and close the prohibition, and the fault information and high voltage are instructed.

On September 24, the 2021 Zhongguancun Forum, co-sponsored by the Ministry of Science and Technology of China, the Chinese Academy of Sciences, the China Association for Science and Technology, and the Beijing Municipal People's Government, officially opened in Beijing. As one of the main agendas of the forum, the Zhongguancun International Technology Exchange Conference closely follows the "smart· healthy· carbon neutrality...

1. Control through this abnormal failure The abnormal fault of the control channel is usually caused by the optical fiber communication between the sub-PWM board and the power unit board, which is generally caused by the following situations: 1. Poor contact of the optical fiber connection part or falling off of the optical fiber head; 2. Optical fiber signal transmitter/receiver ...

1. Over-temperature protection of inverter and its necessity The temperature protection function of the inverter is an indispensable condition to ensure the stable operation of the inverter; In the main circuit power device of the inverter, the rectifier bridge and the inverter bridge are semiconductor power devices.

1. It is necessary to figure out the basic parameters and shape of the device that needs to be replaced. The basic parameters include the rated operating current, the capacitance of the capacitor, the resistance value of the resistor, the value of the GTR Darlington device (current amplification factor), the switching characteristics of the IGBT (including IPM) device, and the saturation voltage ...

1. If there is a sharp acceleration or deceleration, please extend the acceleration and deceleration time. 2. Avoid rapid increase in load. 3. Check whether there is a short circuit in the UVW of the motor terminal. 4. The module is damaged, and the drive circuit is damaged, resulting in an overcurrent alarm. ...