Synchronizing The System Time In The Network - Hirschmann RS20 User Manual

Synchronizing the System Time in the
Network
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 device provides two options with different levels of accuracy for
synchronizing the time in your network.
The Simple Network Time Protocol (SNTP) is a simple solution for low
accuracy requirements. Under ideal conditions, SNTP achieves an accuracy
in the millisecond range. The accuracy depends on the signal delay.
IEEE 1588 with the Precision Time Protocol (PTP) achieves accuracies on
the order of fractions of microseconds. This method is suitable even for
demanding applications up to and including process control.
Examples of application areas include:

Log entries
 Time stamping of production data
 Process control
Select the method (SNMP or PTP) that best suits your requirements. You can
also use both methods simultaneously if you consider that they interact.
UM BasicConfig L2E
Release 8.0 05/2013
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