ABB Relion 630 Series Communication Protocol Manual page 21

1MRS757203 A
630 series
Communication Protocol Manual
IEC 60870-5-103 communication engineering
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Figure 3: Settings under TIMESYNCHGEN:1 in PST
Only CoarseSyncSrc can be set to IEC 60870-5-103, not FineSyncSource.
After setting up the time synchronization source, the user must check and modify
the IEC 60870-5-103 time synchronization specific settings, under: IED
Configuration/Communication/Station communication/IEC60870-5-103:1.
• MasterTimeDomain specifies the format of the time sent by the master. Format
can be:
• Coordinated Universal Time (UTC)
• Local time set in the master (Local)
• Local time set in the master adjusted according to daylight saving time
(Local with DST)
• TimeSyncMode specifies the time sent by the IED. The time synchronisation is
done using the following ways:
• IEDTime: The IED sends the messages with its own time.
• LinMasTime: The IED measures the offset between its own time and the
master time, and applies the same offset for the messages sent as in the
IEDTimeSkew. But in LinMasTime it applies the time changes occurred
between two synchronised messages.
• IEDTimeSkew: The IED measures the offset in between its own time and
the master time and applies the same offset for the messages sent.
• EvalTimeAccuracy evaluates time accuracy for invalid time. Specifies the
accuracy of the synchronization (5, 10, 20 or 40 ms). If the accuracy is worse
than the specified value, the "Bad Time" flag is raised. To accommodate those
masters that are really bad in time sync, the EvalTimeAccuracy can be set to
Off.
According to the standard, the "Bad Time" flag is reported when synchronization
has been omitted in the protection for >23 h.
Section 3
15