Title :
Timing and synchronization for Quasi-Real-Time systems using IEEE 1588v2 over Ethernet
Author_Institution :
LAN Solutions Bus. Unit, Micrel, Inc., San Jose, CA, USA
Abstract :
Ethernet and IEEE 1588 are continuing to emerge in a wide range of industries. Increasingly, they are replacing industry-specific interconnects, delivering performance and cost efficiencies. Initiatives including Industrial Ethernet, IEC 61850, and LXI are all adopting commercial off- the-shelf technologies to achieve broader communications at far lower costs. However, significant investments that are warranted for large automation systems become prohibitively expensive for a diverse set of less, ambitious Quasi-Real-Time (QRT) applications that also require distributed communications and timing. This paper proposes an approach to address the communications and timing/synchronization requirements for QRT systems, characterized by simple and low-cost devices interconnected and synchronized over a real-time network. To achieve the aggressive cost targets, a highly integrated attachment device is introduced that integrates Ethernet communications, IEEE 1588v2 distributed synchronization, and precision I/O for local synchronization in a single, energy efficient device. Systems issues are also raised affecting the applicability for applications that can exploit a QRT network.
Keywords :
input-output programs; local area networks; real-time systems; synchronisation; timing; IEC 61850; IEEE 1588v2; LXI; commercial off-the-shelf technologies; industrial Ethernet; industry-specific interconnects; precision I/O; quasi-real-time systems; synchronization; timing; Automation; Clocks; Real time systems; Standards; Synchronization; Topology; IEEE 1588v2; Industrial Ethernet; Precision I/O; Quasi-Real-Time; Real-Time Ethernet; Synchronized I/O;
Conference_Titel :
Precision Clock Synchronization for Measurement Control and Communication (ISPCS), 2011 International IEEE Symposium on
Conference_Location :
Munich
Print_ISBN :
978-1-61284-893-8
DOI :
10.1109/ISPCS.2011.6070155