Real-time performance of industrial Ethernet needs to be improved - Database & Sql Blog Articles

Modern SK Hynix eMMC 8G industrial grade H26M31001HPR

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

The probe capacitor polarity needle has a head diameter of 5.8. The total length of the 7-pin and 12-pin needles is 5.

Factory direct sales - solid capacitor - patch aluminum electrolysis, to ensure that the factory first-class goods!

Although industrial Ethernet is still in its early stages of development for real-time applications, there are several areas where real-time performance needs further improvement. For instance, in transmission applications like metallurgical rolling and papermaking, high-speed control of multi-roll systems is essential. High-speed machinery such as machine tools and automotive lifting equipment relies heavily on fast sensor inputs for logic control and rapid output. In feeding systems, accurate feeding is ensured by controlling the feed valve based on data from the weighing system.

From a technical and application perspective, several challenges limit the further development of real-time industrial Ethernet:

1. Conflict monitoring mechanism: The CSMA/CD (Carrier Sense Multiple Access with Collision Detection) mechanism defined in IEEE 802.3 introduces a collision process. While full-duplex Ethernet and increased bandwidth have significantly reduced the likelihood of collisions, they still pose potential risks to real-time performance. To enhance real-time capabilities, the back-off algorithm of CSMA/CD must be optimized—specifically, reducing the back-off interval when a collision occurs will improve overall performance.

2. Switch performance: Network nodes play a critical role in delays during data acquisition, processing, and output. Although modern switches can keep delay within 10 μs, network congestion can still severely impact real-time performance. Therefore, integrating features like QoS and HOL Blocking Prevention into switch devices is essential for better real-time control.

3. Network and communication equipment performance: Data transmission delays also affect real-time performance. When planning industrial Ethernet networks, it's common to use less than 30% of the total bandwidth at the device layer. Increasing network bandwidth is necessary, and fiber solutions offer higher electromagnetic compatibility (EMC) and faster transmission speeds, which can further enhance real-time capabilities. With advancements in chip technology, the speed and processing power of communication nodes will continue to improve, supporting more efficient real-time operations.

The evolution of control systems like PLCs also influences the real-time nature of industrial Ethernet. Most industrial applications operate with PLC scanning cycles between 10ms and 10s. However, as lean manufacturing and energy-saving trends become more prevalent, PLCs are expected to handle more complex tasks and improve their processing power. As traditional industries demand shorter scanning cycles, the need for faster I/O data acquisition and communication with other devices will grow, pushing industrial Ethernet to meet these real-time demands. In particular, network delay control and communication efficiency must match the performance of high-speed buses like CANopen and SERCOS, which are increasingly being replaced in industrial settings.