Automatic Summertime Switching; Synchronization - Baer DLX User Manual

3.6.2

Automatic summertime switching

The DLX unit can perform automatic summertime switching if so desired.
The switching times (month weekday, hour) can be programmed (set) in
advance into a table.
Example: Start of summertime:
Start of wintertime:
Please note that when using the table, both times must be programmed as
standard time (CET = wintertime), i.e. if the reverse switching from summer
to winter shall take place at 03:00 summertime, the value must be set as
02:00 in DLXPARA. After a unit reset, summertime switching is activated
(factory setting).
3.6.3

Synchronization

The internal real time clock can be synchronized to the closest full minute
via a freely programmable SYN control input (any of Ctl1 to Ctl7). Currently
two methods of synchronization are available:
•
Via external contact (e.g. external radio clock)
•
Via DCF77 receiver module (type AWS0) from the company Meinberg
(Germany)
In both cases the unit is synchronized to a full minute (seconds = 0). The
permitted synchronization window depends on a setting in DLXPARA:
•
SYN window = 0:
Synchronization in a window of ± 30 seconds around each full minute; syn-
chronization is always possible
•
SYN window > 0:
Synchronization in a window of ± x seconds (max. 29 seconds) around the
end of registration period Tm1, any attempt to synchronize outside of the
permitted time window results in the generation (and storage) of an error
event.
Inside synchronization window an alarm-free window can be defined. When
the DLX is synchronized out of the alarm-free window (but inside the syn-
chronization window) a warning is generated (alert number: 07/02).
Example: SYN window:
Alarm free:
Registration period:
→ Synchronization only permitted in a window of ± 10 seconds around
each full 15 minutes (where minutes = 0 or 15 or 30 or 45).
The DLX cannot be synchronized while the parameterization pass-
word is active !
last Sunday in March, switch from 2:00 to 3:00
last Sunday in October, switch from 3:00 to 2:00
10 seconds
10 seconds
Tm1 = 15 minutes
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