Synchronizing the System Time in the
Network
UM Basic Configuration L3P
Release
7.1
12/2011
7.3
Precision Time Protocol
131
7.3 Precision Time Protocol
7.3.1 Description of PTP Functions
Precise time management is required for running time-critical applications via
a LAN.
The IEEE 1588 standard with the Precision Time Protocol (PTP) describes a
procedure that determines the best master clock in a LAN and thus enables
precise synchronization of the clocks in this LAN.
This procedure enable the synchronization of the clocks involved to an
accuracy of a few 100 ns. The synchronization messages have virtually no
effect on the network load. PTP uses Multicast communication.
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