ABB SYN 5201 Operating Instructions Manual page 21

Operating Instructions
2.6 Stored data
The parameter values are permanently stored in a non-volatile memory, and are not
affected by ageing or failure of the auxiliary voltage. The parameter settings can only be
changed by means of write commands.
In the event of failure of the auxiliary voltage, the event logger data and transient
recorder data are lost after a certain time. Whereas the data keep for 20 days when the
device is in new condition, this period is reduced with age and through the influence of
temperature. Typically, one can assume a minimum storage period of three days.
2.7 Time synchronization
A clock is used in the SYNCHROTACT 5 device for the date and timestamp of event
logger and transient recorder.
There are three ways of synchronizing these with an external clock:

Relative synchronization by means of pulses (pulse synchronization): the time of the
connected PC can be read into the device once using SynView. The synchronization
prevents the clock time from drifting apart by means of periodic pulses (ClockIN
input at connector -X1).

Absolute synchronization: periodic transmission of date and time from clock to the
SYNCHROTACT 5 device via serial interface (-X2 'Time Sync.'). The reference clock
is in this case: Hopf type 6870.

Absolute synchronization over IEC 61850-interface (option)
The optional IEC 61850-communication part of the SYNCHROTACT 5 device contains
one additional clock per system. Upon release ("Enable"), the clock in the synchronizing
part will be overwritten.
abb
ABB Switzerland Ltd
Template: CHIND Techn doc stand, A4 P de, R1.DOT; Filename: 3BHS109762E01 D.doc; Print: 12/6/2011 5:48:00 PM; Save: 12/1/2011 2:37:00 PM; CHIND No. 3BHS109763 ZAB D14 Rev. -; I-Q
One-time time
setting
Relative time
synchronization
Absolute time
synchronization
Absolute time
synchronization
SYNCHROTACT 5
Synchronization
SynView
Binary input
TimeSync.
Communication
IEC 61850
Clock
Enable
Document No Art Part
3BHS109762 E01
SYN 5201/SYN 5202
Clock
OR
&
S10004
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