Setting Parameters; Time Zone And Summer Time; Table 5: Parametrization Of Time Zones And Summer Time - Siemens SIMATIC S7-300/400 Betriebsanleitung

User Manual SICLOCK DCF77 Reception Service for SIMATIC S7-300/400
4

Setting parameters

4.1

Time zone and summer time

The function block offers flexible possibilities for operation in different time zones with
or without summer time switch-over. In the received DCF77 signal, GMT or local time
can be coded with the indication whether it is summer or winter time. At first the
function block always determines GMT from this information. This is corrected with
the value "Zeit_Offset" to get the desired local winter time. The parameter
"SZ_Enable" controls whether this time of day should be adjusted by an additional
hour if summer time is indicated in the received DCF77 signal.
The following table shows typically parameter settings.
Input signal
DCF77 Signal with
MEZ/MESZ
for example from a
DCF77 radio clock or a
GPS radio clock
DCF77 Signal with GMT
for example from the
GPS radio clocks
SICLOCK GPS1000 or
SICLOCK GPSDEC
DCF77 Signal already
with local
summer-/ winter time
for example from the
GPS radio clock
SICLOCK GPSDEC
with time zone
configured.

Table 5: Parametrization of time zones and summer time

Page 14 of 17
Operation in MEZ/MESZ
Aufruf = 1
Zeit_Offset = +60
SZ_Enable = 0 (no summertime)
SZ_Enable = 1 (summertime)
Aufruf = 1
Zeit_Offset = +60
No summer time switch-over
possible.
Aufruf = 1
Zeit_Offset = +60
SZ_Enable = 0 (no summer time)
SZ_Enable = 1 (summer time)
Version 3.0
Operation in other time zones,
here for example Peking +08:00
Aufruf = 1
Zeit_Offset = +480
SZ_Enable = 0 (no summer time)
SZ_Enable = 1 (summer time)
Aufruf = 1
Zeit_Offset = +480
No summer time switch-over
possible.
Aufruf = 1
Zeit_Offset = +60,
In this case no time zone must be
configured, but the default value
+60 is to be taken here.
SZ_Enable = 0 (no summer time)
SZ_Enable = 1 (summer time)
Document order No.: 2XV9450-1AR33