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Control Engineering, May, 2007
Michael Samuelian, Altera Corp.
Hey, buddy, have you got the time? You can answer 'yes,' now that the IEEE 1588 Standard Precision Time Protocol (PTP) is available to industrial automation applications for precise time synchronization (PTS) on Ethernet networks. PTS provides accurate time synchronization for distributed control nodes. A triple-speed Ethernet medium access control (MAC) is essential for supporting the IEEE 1588 Standard and can be implemented in an FPGA (field programmable gate array).
The IEEE 1588 PTP synchronizes an industrial control system to within less than a microsecond. This timing includes synchronizing local clocks in sensors, actuators, and other terminal devices using the same network that also transports process data....
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