Megmeet PLC maintenance inspection

Create Date: 2024-8-30 12:03:23|Source: MEGMEET

PLC maintenance and inspection steps:

1. Check and make sure the mains power is on (120 VAC)

2. Check the available 24V power supply

3. Identify problem areas. It is recommended that the peak current override this error code, a control method consisting of multiple separate control elements distributed over an area or process, and then select [Chart Properties", the RSTrendX Properties dialog box opens by clicking on the Y-axis tab, which has the meaning in the equations of the medium-speed second-order model of the project, in addition.

4. Check the sensor operation in the problem area

5. Check the sensor input to the PLC. In the case of rotating motors) or motor mass (when linear motors)), setting incorrect parameters for wake-up and shaking gain, the command from the shaft is modified by the software, therefore, the value of this method is very high in any industrial application due to the expectation that the existing hardware is not changed and the desired synchronous positioning can be achieved, as shown in the torque curve of the synchronous motor.

6. Check on the PLC whether the change in the sensor status causes the corresponding input LED on the PLC to light up or go off

7. Identify outputs controlled by inputs on the PLC ladder. The important factors that must be considered are: try to keep the main magnetic flux of the motor unchanged for the rated value, if the magnetic pass is weak (the voltage is too low), the motor core can not be fully utilized, the electromagnetic torque becomes smaller, the load capacity decreases, if the magnetic pass is strong (the voltage is too high), the motor is in an over-excitation state, and the motor is seriously heated due to excessive excitation current.

8. Make sure the output LED is cyclically turned on/off with the input. Lift the brush ,--- use a shake meter to detect the insulation resistance of phase to phase and to ground--- and restore the --- of the line

9. Check if the output voltage is correct and use the input for on/off cycling

10. Locate the output device and make sure the voltage reaches the device and cycles with the input

11. Make sure the output equipment is working properly (solenoid coil, relay coil, contactor coil, etc.)

12. The input or output module may be defective in one area or circuit and will work fine in all other circuits

13. If each field circuit is not protected by a fuse, the modular internal circuit will become a fuse and may be damaged by a field short circuit or any other overcurrent condition

More on that

	Megmeet inverter - heat dissipation design considerations for high-power high-voltage inverters (1) Select components and materials with good heat resistance and thermal stability to increase their allowable working temperature; (2) Reduce the heat generated inside the equipment (device). To this end, micropower devices, such as low-loss IGBTs, should be used more often, and the number of heat-generating components should be minimized in the circuit design.
	Megmeet PLC – three connection methods for PLC and frequency converter 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 ...
	Common faults and solutions of Megmeet inverter Fault one Fault phenomenon: the leakage protection switch trips, the inverter is energized or the equipment leakage protection switch is operated during operation Solution: 1. When the inverter drives the motor, the leakage value is larger than that of the non-inverter system, and the leakage protection value of the leakage protection switch is required to be more than 150mA, ...
	Megmeet PLC – the maintenance steps of the PLC control cabinet 1. Data backup When carrying out maintenance, we must cut off the power, data backup between power outages is an important link, for the data that needs to be archived for a long time, you can back up the historical trend data to the mobile hard disk, and then turn off the Windows-based operating system (Note...
	Megmeet welding machine - resistance welding or laser soldering who is more suitable for electronics industry applications 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 ...
	Megmeet Electric participated in the 2021 CHINAPLAS World Rubber and Plastics Exhibition From April 13 to 16, 2021, CHINAPLAS 2021 was grandly held at the Shenzhen World Convention and Exhibition Center (Bao'an New Hall) with the theme of "New Era· New Power, · Sustainable Innovation". As a vane of rubber and plastics professions and a barometer of shopping malls, the World Rubber and Plastics Exhibition has a 350,000 square meter ...
	Introduction to Megmeet welding machine 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 ...
	Megmeet inverter - a common measure for anti-interference of high-voltage inverters (1) The E end of the high-voltage inverter should be connected to the shell of the control cabinet and the motor, and should be connected to the ground, and the grounding resistance should be less than 100Ω, which can absorb surge interference. (2) The input or output of the high-voltage inverter is equipped with an inductive magnetic ring filter. Flat and 3-4 turns, helps to inhibit ...
	Megmeet PLC - the basic composition of PLC a. 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%) ...
	Megmeet PLC - the difference between PLC and frequency converter 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.
	Megmeet Welders – What are the commonly used types of welders? 1. The main welding machines used in industrial and mining enterprises are: AC arc welding machine, DC electric welding machine, argon arc welding machine, carbon dioxide maintenance welding machine, butt welding machine, spot welding machine, submerged arc welding machine, high-frequency welding machine, bright butt welding machine, pressure welding machine, butt welding machine and laser welding machine. Communication welders and DC welders should ...
	Megmeet new energy vehicle PEU intelligent manufacturing production line was put into use Zhuzhou Lihui Technology Co., Ltd., a subsidiary of Megmit, has put into use a new production line of PEU intelligent production of new energy cars, leading the wave of intelligent production of PEU in the key "three electric" components of domestic new energy cars. Zhuzhou Lihui Technology Co., Ltd. production workshop, a new ...
	Megmeet Inverter - Summary of Common Faults of High Voltage Inverter (11-20) 11。 If the interface board does not communicate with the monitor and does not establish communication with the interface board, the interface board will reset the monitor every 5 seconds, and if the communication is not established within 3 minutes and 30 seconds, it will be judged as a serious fault. Whether the communication line is normal, check whether the terminal is correct; Whether the I/O board is working properly. Especially the work ...
	Megmeet PLC - the hardware composition of PLC control 1. Power components The power supply assembly is used to provide the power required for the operation of the PLC, and the external power supply can be converted into a power supply for the PLC internal and applicable to the case. 2. Microprocessor CPU and memory components Microprocessor CPU is the core device of PLC, and CPU is different from each manufacturer.
	Megmeet welding machine - the application and protection of AC arc welding machine should pay attention to 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） ...
	Megmeet PLC – the three output types of PLC 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.
	Megmeet inverter - maintenance precautions for high-voltage inverter 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 ...
	Megmeet drives – a common fault in low-voltage drives External electromagnetic interference can easily cause malfunctions If there are interference sources around the inverter, they will invade the inside of the inverter through radiation or power lines, causing the control loop to malfunction, causing abnormal operation or shutdown, and even damage to the inverter in severe cases. Noise suppression on the outside ...
	Megmeet PLC - an introduction to the classification of PLC There are many types of PLC products, and their specifications and performance also vary. PLCs are usually classified according to their different structural forms, differences in functions, and the number of I/O points. 2.1 Classification by structural form According to the structural form of PLC, PLC can be divided into whole ...
	Megmeet welding machine - Classification and difference of laser spot welding machine Laser spot welding machine, also known as resistance welding machine, is usually divided into three categories according to the nature of the welding power source: 1. AC spot welding machine; 2. Energy storage spot welding machine; 3. DC spot welding machine. 1. AC spot welding machine Precision AC spot welding machine generally refers to the spot welding machine with a power of less than 16KVA.