Although industrial Ethernet is still evolving in real-time applications, there are several areas where its performance needs improvement. For example, in transmission applications like metallurgical rolling and papermaking, multi-roll systems require high real-time adjustments of line speed. High-speed machinery such as machine tools and automotive lifting equipment depend on fast sensor inputs to perform logic control and high-speed outputs. Feeding systems also rely on high-speed input controls to manage feed valves from weighing systems, ensuring accurate material delivery.
From a technical and application perspective, several challenges hinder the further development of real-time industrial Ethernet:
1. Conflict Monitoring Mechanism: The CSMA/CD mechanism defined by IEEE 802.3 in the MAC layer introduces a collision detection process. While full-duplex Ethernet and increased bandwidth have reduced collision probability, it still poses hidden risks for real-time performance. To enhance real-time capabilities, the back-off algorithm of CSMA/CD should be optimized. This means reducing the back-off interval when a collision is detected, thereby improving overall system responsiveness.
2. Switch Performance: Network node devices significantly impact delay. Although modern switches can keep delays under 10 μs, heavy network loads can still affect real-time performance. Implementing features like QoS and HOL Blocking Prevention in switch devices can help maintain stability and reliability in critical environments.
3. Network and Communication Equipment: Data transmission delays also play a key role in real-time performance. When planning industrial Ethernet networks, device-layer load is typically less than 30% of total bandwidth. Increasing network bandwidth and adopting fiber solutions—offering better EMC performance and faster transmission speeds—can further enhance real-time capabilities. With advancements in chip technology, communication nodes will process data packets more efficiently, contributing to improved real-time performance of Ethernet systems.
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 gain momentum, PLC functions and processing power are expected to evolve rapidly. As traditional industries demand shorter PLC scanning cycles, the need for faster I/O data acquisition and communication with other devices will grow, pushing industrial Ethernet to meet these higher real-time standards. In particular, in terms of network delay control and communication efficiency, high-speed buses like CANopen and SERCOS may eventually be replaced by more advanced Ethernet-based solutions.
High Voltage Motor,Steady High Voltage Motor,High Voltage Ip23 Motor,High Voltage Motor For
Jiangsu Hengchi Motor Technology Co., Ltd , https://www.hcemotor.com