13.Time Synchronization - ABB REM 610 Technical Reference Manual

REM 610
4.1.1.13.
18
Motor Protection Relay
Technical Reference Manual
IRF codes can indicate:
• no response on the output contact test
• faulty program, work or parameter memory
• internal reference voltage error
In case of a warning, the relay will continue to operate with full or reduced
functionality and the green indicator LED (ready) will remain lit as during normal
operation. A fault indication message (see Fig. 4.1.1.12.-2), with a possible fault
code (see Fig. 4.1.1.12.-3), will appear on the LCD indicating the type of fault.
WARNING
BATTERY LOW
Fig. 4.1.1.12.-2 Warning with text message
WARNING
FAULT CODE: 2049
Fig. 4.1.1.12.-3 Warning with numeric code
For fault codes, refer to section Self-supervision (IRF) system.
Time synchronization
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.
When 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.
If the synchronization pulse differs more than +/- 0.05 seconds for second-pulse or
+/- 2 seconds for minute-pulse synchronization, the synchronization pulse will be
rejected.
Time synchronization is always triggered on the rising edge of the digital input
signal. The typical accuracy achievable with time synchronization via a digital input
is +2.5...-2.5 milliseconds for second-pulse and +5...-5 milliseconds for minute-
pulse synchronization.
The time must be set once, either via serial communication or manually via the HMI.
When 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
1MRS 752263-MUM