A 35
1.6 Changing between summertime and wintertime
The following paragraphs illustrate the changes in system time and device
status of a registration period when switching from wintertime to summer-
time (and vice versa) and subsequently retrieving data using the SCTM
protocol.
1.6.1 Switching from wintertime to summertime
Example: Data registered on 28.03.99 is being retrieved, registration period length is
15 minutes.
CET
Central European
Time
CEST
Central European
Summertime
S-Bit
T-Bit
*
Explanation
01:30 01:30 0 0 Wintertime
01:45 01:45 0 0 Wintertime
02:00 03:00 1 1 Summertime S-Bit is 1,
the change from wintertime to summer-
time has taken place T-Bit is 1
02:15 03:15 1 0 Summertime
02:30 03:30 1 0 Summertime
*
: The T-Bit will be set in each registration period where the time was mod-
ified.
1.6.2 Switching from summertime to wintertime
Example: Data registered on 31.10.99 is being retrieved, registration period length is
15 minutes
CET
Central European
Time
CEST
Central European
Summertime
S-Bit
T-Bit
*
Explanation
00:30 01:30 1 0 Summertime
00:45 01:45 1 0 Summertime
01:00 02:00 1 0 Summertime
01:15 02:15 1 0 Summertime
01:30 02:30 1 0 Summertime
01:45 02:45 1 0 Summertime
02:00 02:00 0 1 Wintertime S-Bit is 0,
the change from summertime to winter-
time has taken place T-Bit is 1
02:15 02:15 0 0 Wintertime
02:30 02:30 0 0 Wintertime
*
: The T-Bit will be set in each registration period where the time was mod-
ified.
To Next Page