Transportation power, urban rail responsibility. With the vigorous development of emerging technologies such as 5G, cloud computing, big data, and artificial intelligence, more innovative technologies are accelerating the empowerment of urban rail transit, and smart urban rail is ushering in a "golden age" of development. As a deep cultivator in the field of smart urban rail, Hollysys adheres to the two-wheel drive of technological innovation and product innovation, focuses on the big track of smart transportation, and actively promotes the digital and intelligent upgrading of the urban rail transit industry.
On October 9, the 2021 Beijing International Urban Rail Transit Exhibition and Summit Forum opened in Beijing, and Hollysys participated in the exhibition with the theme of "Cloud-side Collaboration and Intelligent Connected Ecology", and released two new products, Edge Intelligent Controller (EIC) and Edge Intelligent All-in-One (EIA) at the exhibition site. This move marks the completion of the integration of the smart urban rail integrated business platform ("cloud") and edge computing platform ("edge"), and the multi-dimensional efforts of "cloud-edge collaboration" have injected new vitality into the development of smart urban rail.
With the continuous expansion of the boundary of the cloud platform, a large number of devices are connected to the network, and the scale of the network is expanding, and the demand for real-time analysis of massive data is becoming more and more prominent. Compared with cloud computing, edge computing has gradually become a new focus of the industry because it is closer to the user and device side. Wang Renzhe, deputy general manager of Xi'an Hollysys System Engineering Co., Ltd., introduced that Hollysys built an edge computing platform to better coordinate data processing and application deployment, and realize edge autonomy in the case of latency sensitivity and limited bandwidth. Through the deep integration of the edge computing platform and the cloud platform, the delay between data production and decision-making is effectively reduced, and the cloud-edge-end collaboration is realized.
The edge intelligent controller released this time integrates PLC, PC, motion control, gateway, data acquisition, fieldbus protocol, machine vision, equipment networking and other multi-field functions, and realizes high-frequency data collection, device-level intelligent analysis and other functions while realizing equipment motion control, computing, storage, network and cloud-side collaborative on-site intelligent control. The edge intelligent controller can be divided into different business systems such as industrial control and edge computing, so that each system can be safely isolated and flexibly expanded, which can effectively reduce engineering deployment and operation and maintenance costs while improving performance.
The edge intelligent all-in-one machine adopts the whole cabinet delivery mode of software and hardware integration to build a station-level edge cloud platform to realize the integration and management of computing, storage, network, security and other resources in the station. It can provide rich communication protocols and equipment models to realize the rapid access and processing of data in the station; At the same time, it supports the orchestration and deployment of containers and microservices to provide support for intelligent applications. Song Xiaoli, deputy chief engineer of Beijing Hollysys System Engineering Co., Ltd., introduced that the edge intelligent all-in-one machine has the characteristics of data localization, low latency, agile deployment, business autonomy, etc., which can help users achieve the construction and management goals of "reducing costs, increasing efficiency and ensuring security", so that users can truly feel the new value brought by "cloud-edge collaboration".
At present, Hollysys edge intelligent controller and edge intelligent all-in-one machine have been successfully implemented in the first phase of Beijing Metro Line 19, realizing the first successful application of Hollysys edge computing platform in the field of smart urban rail. Through the combination of virtualization technology with traditional industrial control and AI artificial intelligence algorithms, the edge intelligent controller realizes the application of traditional BAS functions, electromechanical intelligent diagnosis functions and other scenarios, and realizes fault diagnosis and predictive analysis of five types of equipment/systems such as escalators, fans, platform doors, batteries, and energy-saving control.
With the in-depth deployment and application of innovative technologies, the construction of smart urban rail will pay more attention to high-quality innovation in operation, management and services. As a provider of traffic control system solutions and services, Hollysys will also adhere to its role as a "professional builder of smart urban rail ecology", and based on the solid foundation of "cloud-edge collaboration", it will comprehensively help the digital transformation and upgrading of the urban rail industry, and achieve a better urban travel experience with scientific and technological innovation.
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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 ...
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Common faults and solutions of Megmeet inverter
1. Leakage protection switch
Phenomenon: The leakage protection switch of the equipment is activated when the inverter is powered on or running
Measures:
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 150mA and above, and the action delay is ...
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Megmeet inverters – what are the development directions of inverter-related technologies?
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.
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The unified setting of the Megmeet welding machine and the parameter setting of the system
1. Unified setting of Megmeet welding machine
The so-called unification of welding means that the welding machine automatically matches the welding voltage according to the currently set welding current and the unification voltage correction value.
The unification setting of Megmeet welder should first turn on the function on the welder side, ...
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Megmeet PLC - What are the five stages of the PLC work process?
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.
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Megmeet inverter - the role and application of the inverter control cabinet introduction
Inverter control cabinet (inverter electrical control cabinet / electric control cabinet / electric control box) is an electrical control cabinet developed by using inverters from Siemens, ABB, Schneider, Fujifilm, Mitsubishi, Panasonic, Delta, Shilin, Inovance and other manufacturers.
According to the needs of working conditions, AC transmission can be installed in the frequency conversion cabinet.
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Megmeet PLC maintenance and processing methods
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 ...
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The application of Megmitte industrial control products in high-speed precision CNC machine tools
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Analysis of the fault code of Megmeet welder
1. E1: indicates sensor failure. In this case, it is necessary to check whether the sensors of Megmeet are damaged or whether the wiring is loose.
2. E2: Indicates overweight load. At this point, it is necessary to check whether the load of Megmeet exceeds the set maximum load.
3. E3: Indicates battery ...
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Megmeet inverter maintenance and testing method
Megmeet inverter maintenance and testing method
1. The Megmeet rectifier module is damaged
It is usually caused by grid voltage or internal short circuit. In the case of sweeping internal short circuits, the rectifier bridge is replaced. When dealing with shortcomings on site, the user power grid should be checked.
Such as electricity ...
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Megmeet PLC - What are the functions of the PLC gateway?
1. PLC industrial gateway has rich interfaces and is easy to deploy
It supports 4G, 3G, PPPOE, Wi-Fi network, digital IO input and output, and serial terminal communication, providing different access solutions for different applications.
2. Intelligent analysis and efficient access
Inline protocol analysis ...
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Megmeet inverter - the basic method and steps of inverter commissioning
1. No-load energizing test of inverter
1. Ground the grounding terminal of the inverter.
2. Connect the power input terminal of the inverter to the power supply through the leakage maintenance switch.
3. Check whether the factory display of the inverter window is normal, if it is incorrect, it should be reset, otherwise it should be ...
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Megmeet PLC - Comparison of the advantages of PLC and DDC in building automation systems
1. Application field: The initial design goal of PLC is only to replace complex relay circuits, and DDC is originally only used in industrial automation instruments: PLC emphasizes versatility, DDC emphasizes specificity: PLC is used in the field of industrial control, and DDC is used in professional building systems.
2. Structural differences ...
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Common faults of Megmeet drives and how to deal with them
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 ...
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Megmeet PLC - What is the difference between PLC and MCU?
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 ...
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Megmeet welding machine - analysis of common problems of welding machine welding
One. It is difficult to start the arc and easy to break the arc
1. Confirm that the quality of the electrode you use is good, and the poor quality electrode may not meet the requirements of high-quality welding:
2. The welding rod that has not undergone drying treatment is also not easy to arc, and causes the arc to be unstable, so that the welding defects increase, and the welding ...
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Megmeet inverter - 5 precautions for the use of inverter
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Megmeet MC100 series plc – the right hand man in refrigeration equipment
First, the process requirements
When the low-pressure pressure collected by the system is greater than the upper low-pressure pressure set by the touch screen, the compression time will be loaded according to the set loading time, and the lower pressure will be reduced according to the set load reduction time.
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The principle and characteristics of Megmeet tungsten argon arc welding and resistance welding
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.
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Solutions to common faults of Megmeet inverter (2)
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 ...
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