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News Release from: Open DeviceNet Vendor Association | Subject: CIPsync services for DeviceNet and EtherNet/IP
Edited by the Engineeringtalk Editorial
Team on 18 September 2003
CIPsync services for DeviceNet and
EtherNet/IP
ODVA is to add time synchronisation services for real-time control applications to its Common Industrial Protocol (CIP).
ODVA is to add time synchronisation services for real-time control applications to its Common Industrial Protocol (CIP) The CIPsync services for DeviceNet and EtherNet/IP will deliver assured time synchronisation of devices and controllers across these networks, important in areas such as distributed motion control or event recording applications, or indeed any installation requiring enhanced control coordination
This article was originally published on Engineeringtalk on 29 Feb 2000 at 8.00am (UK)
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Since its introduction a few years ago, Devicenet has grown rapidly in the UK and is now the leading Controller Area Network (CAN) based system.
CIPsync is based on the recently announced IEEE1588 standard "Precision clock synchronisation protocol for measurement and control systems", which is designed for local area networks like Ethernet that support multicast messaging.
This profile matches ODVA's CIP-based, producer/consumer networks, making the time synchronisation standard ideally suited to both DeviceNet and EtherNet/IP.
Using a 100Mbit/s switched Ethernet system, testing has shown that CIPsync can deliver time synchronisation accuracy of less than 500ns between devices the benchmark standard for critical real-time applications.
ODVA Europe chairman Michael Juniper comments: "CIPsync will allow users to base control on true time synchronisation rather than the more limited event synchronisation model used historically.
Not only will this provide tighter control in standard control applications, it will also eliminate the need for special purpose components and communication protocols in the most demanding real-time applications".
Further simplifying network implementation, CIPsync will allow EtherNet/IP users to take advantage of commercial-off-the-shelf (COTS) Ethernet hardware, and so standardise on network architectures fully compatible with TCP/IP and UDP/IP.
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