The DST on/off date must precede the selected DST on/off day and be within the
same week as the DST shift.
Table 28:
Possible date values for DST change on Sunday
Day of the DST shift
DST on/off date (dd)
First Sunday of the month
1
Second Sunday of the month
8
Third Sunday of the month
15
Fourth Sunday of the month
22
Last Sunday, if the month has 30 days
24
Last Sunday, if the month has 31 days
25
For example, if the DST is observed from the last Sunday in March to the last Sunday
in October and the time shift occurs at 01:00 UTC, the setting parameters are the
following.
DST on time:
01:00
DST on date:
25.03
DST on day:
Sun
DST off time:
01:00
DST off date:
25.10
DST off day:
Sun
Set the
DST on day
and
DST off day
to "not in use" to determine the exact
date and time for the DST shift. Repeat the setting yearly, as the time for
the DST shift is not on the same date every year.
To disable the DST, set the
DST offset
parameter to "0 min".
Section 8
1MAC456939-IB D
Commissioning
130
620 series ANSI
Operation Manual
