Common faults of Megmeet drives and how to deal with them

The PLC communicates with the host computer, and BlandC is used to write the communication program between the host and the PLC, and the COM1 port must be initialized, the baud rate is 9600bps, and the parity check bit adopts even check, and the seven-digit valid data is used. When the computer receives the response character ACK from the PLC, it ...

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. 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 ...

The basic principle of a high-voltage inverter There are two categories of frequency conversion process of frequency converter: AC-AC form and AC-DC-AC form. Now it is mostly in the form of AC-DC-AC, and the following is a brief introduction to the working principle of this form. Three-phase high-voltage electricity enters the high...

1. Power supply The power supply of the PLC plays a very important role in the whole system. It can't work properly without a good and reliable power supply system, so PLC manufacturers also attach great importance to the design and manufacture of power supplies. General AC voltage fluctuations are +10% (+15%) ...

1. CPU abnormality: When the CPU is abnormally alarmed, check the device connected to the internal line of the CPU unit. The specific method is to replace the units that may cause failures in turn, find out the faulty units, and deal with them accordingly. 2. Memory abnormality: When the memory is abnormal alarm, if it is a program ...

1. Do not execute the program: The input check is identified by the input LED indicator or the input monitor composed of a writer. When the input LED is not lit, it can be preliminarily determined that the external input system is faulty, and then check with the multimeter. If the output voltage is not normal, it can be determined that ...

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 ...

In the manufacturing industry, there are a large number of open-loop sequential control based on switching quantities, which carries out sequential action numbers according to logical conditions and operates in chronological order; In addition, there is the control of chain protection actions according to the logical relationship that is not related to the sequence and timing; As well as a large number of switching quantities, pulse quantities, gauges...

Peripheral circuit component failure This type of failure often occurs in the failure of the PLC after a certain period of work. In the PLC control loop, if there is a component damage fault, the PLC control system will immediately and automatically stop working. The input circuit is PLC to accept switching quantities, analog quantities, etc.

1. Damage to the welding power supply. Due to the high current and high voltage during welding, when the welding current exceeds 20% of the rated value, overcurrent protection will appear, so that the circuit will automatically cut off the power supply. In addition, if the welding time is too long, it can also cause overcurrent. Therefore, we should try our best to ...

1. Classified according to the input voltage level According to the input voltage level, the inverter can be divided into low-voltage inverter and high-voltage inverter, and the low-voltage inverter is common in China with single-phase 220 V inverter, three-phase 220 V inverter, and i-phase 380 V inverter. High-voltage inverters are commonly used in 6 kV, 10 kV transformers.

1. Intelligent network The intelligent inverter does not need to set a lot of parameters when it is used, and it has the function of fault self-diagnosis, which has high stability, high reliability and practicability. The Internet can be used to realize the linkage of multiple inverters, and even the inverter complex in the factory.

1. The load of the buffer inverter without functional quantity is an asynchronous motor, which is an inductive load, and in addition to transmitting active power between the intermediate DC link and the motor, there is also the exchange of reactive power. Since the power electronic switching devices cannot be stored for energy, the non-functional energy can only rely on the energy storage elements (filters).

1. Common processing: reset the monitoring timer, perform hardware checks, user memory checks, etc. 2. Program execution: The CPU interprets and executes each instruction in the order of first left and then right, first up and then down, and reads out each relay according to the input image register and the component image register.

Safety operation procedures for spot welding machines: 1. Before operation, the oil stain of the upper and lower electrodes should be removed. After power-on, the body shell should be free of leakage. 2. Before starting, the steering switch of the control line and the small switch of welding current should be connected, the number of poles should be adjusted, and then the water source and gas source should be connected.

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、 ...

What are the braking methods of the inverter? Generally speaking, braking refers to the technical measures taken during the operation of the motor due to fault protection or man-made active shutdown, and the commonly used inverter braking methods include energy consumption braking, feedback braking, DC braking and DC feedback braking. ...

1. Hydraulic coupling method. That is, a hydraulic coupling device is inserted between the motor and the load in series, and the size of the coupling force between the motor and the load is adjusted by the height of the liquid level, so as to realize the speed adjustment of the load; 2. Cascade speed regulation. Tandem speed regulation must use a wound asynchronous motor, and the rotor ...

1. Realize remote control of industrial field equipment; 2. The PLC industrial gateway realizes remote upgrade of equipment firmware, downloads the program, and can flexibly access various equipment management platforms; 3. Realize remote control of industrial site touch screen and remote mapping of configuration screens; 4. PLC industry ...