Grandmaster time src indicates the source of time used by the grandmaster clock.
Grandmaster accuracy indicates the accuracy of the grandmaster clock.
SMV accuracy monitoring values
The SMV accuracy monitoring values are found via menu path Monitoring/IED
status/SMV accuracy.
Table 15: SMV accuracy monitoring values
Description Value
SMV synch accuracy No sync
Local clock
Global clock
Local synch accuracy
Max Dev Sync Acc
SMV synch accuracy value ”No sync” indicates that the SMV is either not in use or it
does not use IEEE 1588 v2. The clock synchronization is locally synchronized to the
grandmaster clock with parameter value “Local clock” and to the GPS clock with
parameter value “Global clock”.
Local synch accuracy indicates the time synchronization accuracy in microseconds.
Max Dev Sync Acc indicates the maximum clock deviation in situation where clock
accuracy was over 4 µs.
6.4.6 Power profile parameters
The IEDs' IEEE 1588 v2 time synchronization complies with the IEEE C37.238-2011
Power Profile.
For best interoperability, third party devices in the same IEEE 1588 v2 time domain
network must be set according to Power Profile either via the power profile parameter
or by individually setting the parameters according to Power Profile.
Table 16: IEEE C37.238-2011 Power Profile key parameters
Parameter
Value
1)
Delay Mechanism P2P
VLAN priority mandatory (default=4)
Ethertype 0x88f7
Announce period 1 s
Sync period 1 s
Pdelay period 1 s
PTP mode transparent
1)
Some devices use the standard notation format 2
x
[s] of IEEE 1588 v2 intervals. The values in this table
are in [s] format.
1MRS757809 C Section 6
Process bus and IEEE 1588 time synchronization
REC615 and RER615 77
Engineering Guide
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