Time
RM Web L2B
Release
5.3
05/2012
3.2
PTP (IEEE 1588)
57
3.2 PTP (IEEE 1588)
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.
Devices without PTP hardware support, which only have ports absent a
time stamp unit, support the PTP simple mode. This mode gives a less
accurate division of time.
With these devices
enable/disable the PTP function in the PTP Dialog,
select PTP mode in the PTP Dialog.
–Select v1-simple-mode if the reference clock uses PTP Version 1.
–Select v2-simple-mode, if the reference clock uses PTP Version 2.
Note: In the simple mode a device synchronizes itself with PTP messages
received. This mode provides a precision comparable to SNTP absent other
functions, such as PTP management or runtime measuring.
If you want to transport PTP time accurately through your network, only use
devices with PTP hardware support on the transport paths.
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