Functional Description and Specifications RUB SW
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3.5 Time & Date Reference Status
This module monitors the pulse-per-second input signal (PPS), the serial data string with time
& date and status information, and the correct timing of both signals with respect to a definite
correspondence of the serial data to the PPS signal.
The status and individual errors are considered for monitoring only; they have no effects on
the automatic changeover characteristics.
time
Current time, received via serial data string.
date
Current date, received via serial data string.
sync after reset
Status, received via serial data string. Indicates that the reference source
could have been synchronized at least once after turning the power on.
locked
Status, received via serial data string. Indicates that the reference source
currently is synchronized.
last lock
Time & date of the moment of last indication of a “locked” status.
Individual reference errors:
Error
Description
pps timeout
No valid PPS detected since 1.6 s.
pps timing
The interval between two consecutive PPS signals does not correspond to one
second.
serial timing
The serial data string is not synchronized with the PPS signal.
serial
sequence
A time discontinuity has been detected while checking the time & date
information of the serial data string. This leads to an error even at a valid
time discontinuity in case of a leap second or a DST switching if a local time
zone has been selected as reference.
