Time Synchronization - ABB REU 610 Technical Reference Manual

REU 610
5 . 1. 1. 8 .
18
Voltage Relay
Technical Reference Manual
W ARNING
B ATTERY LOW
Fig. 5 .1.1.7 .-2 W arning w ith tex t mes s age
W ARNING
FAULT CODE:
Fig. 5 .1.1.7 .-3 W arning w ith nu meric code
F or fault codes, refer to 5 .1.18 . S elf- supervision ( IR F ) system
T i m e s yn c h r on i z ati on
Time synchronization of the relay's real- time clock can be realized in two
different ways: via serial communication using a communication protocol or
via a digital input.
W hen time synchronization is realized via serial communication, the time is
written directly to the relay's real- time clock.
Any digital input can be configured for time synchronization and used for
either minute- pulse or second- pulse synchronization. The synchronization
pulse is automatically selected and depends on the time range within which
the pulse occurs. Two detected pulses within acceptable time range are
required before the relay activates pulse synchronization. R espectively, if the
synchronization pulses disappear, the relay takes time that corresponds to the
time range of four pulses before de- activating pulse synchronization. The
time must be set once, either via serial communication or manually via the
H M I.
W hen the time is set via serial communication and minute- pulse
synchronization is used, only year- month- day- hour- minute is written to the
relay's real- time clock, and when second- pulse synchronization is used, only
year- month- day- hour- minute- second is written. The relay's real- time clock
will be rounded to the nearest whole second or minute, depending on whether
second- or minute- pulse synchronization is used. W hen the time is set via the
H M I, the entire time is written to the relay's real- time clock.
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1MRS755769
A 040279
A 040280