Time Synchronization; Time Master Supervision Gnrlltms - ABB RELION REX640 Technical Manual

Basic functions
Table 49: IEC 61850 mapping
LED instance in Application
Configuration
LED1...LED11
LED12...LED22
LED23....LED33
LED34...LED44
LED45...LED55
LED56....LED66
3.6

Time synchronization

3.6.1

Time master supervision GNRLLTMS

3.6.1.1 Function block
Figure 48: Function block
3.6.1.2 Functionality
The protection relay has a disciplined RTC in hardware with a resolution of
one nanosecond. The clock can be either free-running or synchronized to an
external source. The RTC is used to time-stamp events, recorded data, disturbance
recordings, sampled measured values and various other system services.
The protection relay supports SNTP, IRIG-B, IEEE 1588 v2, DNP3, Modbus,
IEC 60870-5-101/104, IEC 60870-5-103 and line differential communication to
synchronize the RTC. IEEE 1588 v2 with a GNSS grandmaster clock and IRIG-B
provide the accuracy of ±1 μs. The accuracy is ±1 ms with SNTP.
122
Mapping in IEC 61850 data model (ALARM and OK signals)
LEDGGIO1.Alm1...LEDGGIO1.Alm11
LEDGGIO1.Ind1...LEDGGIO1.Ind11
LEDGGIO2.Alm1...LEDGGIO2.Alm11
LEDGGIO2.Ind1...LEDGGIO2.Ind11
LEDGGIO3.Alm1...LEDGGIO3.Alm11
LEDGGIO3.Ind1...LEDGGIO3.Ind11
LEDGGIO4.Alm1...LEDGGIO4.Alm11
LEDGGIO4.Ind1...LEDGGIO4.Ind11
LEDGGIO5.Alm1...LEDGGIO5.Alm11
LEDGGIO5.Ind1...LEDGGIO5.Ind11
LEDGGIO6.Alm1...LEDGGIO6.Alm11
LEDGGIO6.Ind1...LEDGGIO6.Ind11
1MRS759142 F
REX640
Technical Manual