Siemens siprotec 7SA6 User Manual page 181

7SA6 Manual
C53000-G1176-C133-1
Figure 5-57 Dialogue box for time synchronization and format in DIGSI
Here you may select the time standard for internal time stamping by selecting from the
following modes:
Table 5-7 Operating modes for time synchronization
Item Operating Mode
1
IQWHUQDO
,E& ²²
2
P52),%86 )06
3
,R,* % 7LPH VLJQDO External synchronization using IRIG B
4
'&F 7LPH VLJQDO
5
6 SIMEAS Time signal
6\QF BR[
3XOsH YLD ELQDU\
7
LQSXW
The RTC continues running, even when the auxiliary voltage is temporary absent, by
means of an internal battery. During the device powering up, or if the auxiliary voltage
has failed, this RTC is the first synchronization source for the internal clock,
independent of operating mode selected.
In ,QWHUQDO mode, the system time is controlled using only the RTC as the
synchronization source. It may be set manually. The procedure for manual date/time
setting is given in Section 7.2.1.
If an external source is selected, only the selected synchronization source is used. If
the source fails, the internal clock continues unsynchronized.
If time synchronization is to take place via a master control system, the option ,(&²
²² or 352),%86 )06 must be selected (Figure 5-57).
*: not available in firmware Version 4.0 and 4.1
Explanations
Internal synchronization using RTC (pre-set)
External synchronization using the system interface and the
IEC 60870–5–103 protocol
External synchronization using PROFIBUS interface
External synchronization using DCF 77
External synchronization using SIMEAS Sync. Box
External synchronization with pulse via binary input
Configuration
®
4
5-57