Megmeet MC100 series plc – the right hand man in refrigeration equipment

1. Regularly dust the inverter, focusing on the rectifier cabinet, inverter cabinet and control cabinet, if necessary, the rectifier module, inverter module and the circuit board in the control cabinet can be removed for dust removal. Whether the lower air inlet and upper air outlet of the inverter are dusty or blocked due to excessive dust. The inverter is due to the ...

What aspects should be paid attention to in the application and protection of AC arc welding machine: (1) It should be used according to the additional welding current and load continuation rate of the welding machine, and should not be overloaded. (2) The welding machine is not allowed to be short-circuited for a long time. (3) The regulating current should be operated at no load. （4） ...

1. When the oscilloscope looks at the current monitoring output of the driver, it finds that it is all noisy and cannot be read Cause: The current monitoring output is not blocked from the AC power supply (transformer). Solution: You can use a DC voltmeter to detect and investigate. 2. Servo motor high speed ...

Open-loop control Open-loop control of switching quantity is the most basic control function of PLC. The instruction system of PLC has powerful logic operation ability, and it is easy to realize various logic control methods such as timing, counting, and sequential (stepping). Most PLCs are used to replace traditional relay contactors...

1. The meaning of the representation is different: PLC is the abbreviation of planar optical waveguide (technology), the so-called planar optical waveguide, means that the optical waveguide is located in a plane. A servo control system is a feedback control system used to accurately follow or reproduce a certain process.

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). ...

1. Maintenance items and scope: Daily maintenance and maintenance of inverter Due to the influence of environmental temperature, humidity, dust and vibration, it will lead to the aging of the internal components of the inverter, resulting in the potential failure of the inverter or reducing the service life of the inverter. Therefore, there is a must ...

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.

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 ...

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 ...

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. 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. 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 ...

3) Tungsten argon arc welding (TIG) Non-melting electrode gas arc welding, TIG welding, English is Tungsten Inert Gas (abbreviated TIG), also known as Gas Tungsten Arc Welding (abbreviated GTAW) The principle is: TIG welding is in argon and other inert gases.

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. The electrical control cabinet installed with PLC should have a clean and dry environment. Moisture-absorbing dry materials should be placed inside, and the splashing of coolant and oil mist should be prevented. 2. Regardless of the system working or shutdown, the electrical cabinet door should always be closed, and the electrical components should be kept in a good state.

When the oscilloscope looks at the current monitoring output of the driver, it is all noisy and cannot be read Cause: The current monitoring output is not blocked from the AC power supply (transformer). Solution: You can use a DC voltmeter to detect and investigate. Servo motor high-speed rotation ...

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 frequency conversion room, and the ambient temperature should be between -5 °C and 40 °C. The temperature rise of the phase-shifting transformer should not exceed 130°C 3. Summer temperature ...

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 ...

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.