Synchronizing the system time in the
Basic - L3P
Release
4.0
11/07
1
7 Synchronizing the system time
in the network
The actual meaning of the term "real time" depends on the time requirements
of the application.
The Switch provides two options with different levels of accuracy for synchro-
nizing the time in your network.
If you only require accuracies in the order of milliseconds, the Simple Net-
work Time Protocol (SNTP) provides a low-cost solution. The accuracy de-
pends on the signal running time.
Areas of application for this protocol include:
X log entries
X time stamping of production data
X production control, etc.
IEEE 1588 with the Precision Time Protocol (PTP) achieves accuracies in
the order of fractions of microseconds. This superior method is suitable for
process control, for example.
Select the method that best suits your requirements. You can also use both
methods simultaneously if you consider that they interact.
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