Hitachi Relion 670 Series Applications Manual page 412

Section 21
Basic IED functions
21.11.2 Setting guidelines
All the parameters related to time are divided into two categories: System time and Synchronization.
21.11.2.1 System time
21.11.2.2 Synchronization
The setting parameters for the real-time clock with external time synchronization are set via local HMI
or PCM600. The path for Time Synchronization parameters on local HMI is Main menu/
Configuration /Time/Synchronization . The parameters are categorized as Time Synchronization
(TIMESYNCHGEN) and IRIG-B settings (IRIG-B:1) in case that IRIG-B is used as the external time
synchronization source.
IEEE 1588 (PTP)
Precision Time Protocol (PTP) is enabled/disabled using the Ethernet configuration tool /ECT) in
PCM600.
PTP can be set to On,Off or Slave only. When set to Slave only the IED is connected to the PTP-
group and will synchronize to the grandmaster but cannot function as the grandmaster.
A PTP-group is set up by connecting the IEDs to a network and enabling PTP. To set one IED as the
grandmaster change Priority2 to 127 instead of the default 128.
IEC16000089 V1 EN-US
Figure 200:
The PTP VLAN tag must have the same value in station clock and in the IED. The default value is set
to 0.
The PTP VLAN tag does not need to be the same on all access points in one IED. It is possible to
mix as long as they are the same for all devices on each subnet.
406
Enabling PTP in ECT
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