MAN0964-14-EN_XL4_XL4P_UM
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5.11 Set Time/Date
The following instructions are to set and display the real-time clock in the controller. More
details can be found in the Help File in Cscape.
Table 5.1
–
Clock and Time Setting Terms
Coordinated Universal Time
(UTC)
Abbreviated to UTC, Coordinated Universal Time is the
primary time standard by which the world regulates
clocks and time.
Time Offset
In order to obtain the local time (anywhere in the
world), the user needs to subtract / add a certain
number of hours from UTC depending on how many
time zones user is away from Greenwich.
Network Time Protocol (NTP)
A Networking Time Protocol (NTP) for clock
synchronization between computer systems over
packet-switched, variable latency data networks.
Daylight Saving Time
Time as adjusted to achieve longer evening daylight,
especially in summer, by setting the clocks an hour
ahead of the standard time.
Apply Daylight Saving (DST)
Daylight Saving Time (DST) is the practice of setting
the clocks forward one hour from standard time during
the summer months, and back again in the fall, in order
to make better use of natural daylight. Selecting this
option increases the Time offset by 1 hour.
NOTE: Not all controllers contain real-time clocks.
NOTE: Controller Time Zone (UTC time): From Cscape 9.70 SP2 and FW 14.22 onwards, UTC
time is supported.
Table 5.2
–
System Registers for UTC (Coordinated Universal Time)
%SR210 (R/W)
Time Zone: set in hours + / - UTC.
%SR211 (R/W)
Daylight Saving: YES = 1
Daylight Saving: NO = 0
(If daylight saving is enabled, one hour will be added
to the local time).
%SR212 (R)
UTC
–
Seconds
%SR213 (R)
UTC
–
Minutes
%SR214 (R)
UTC
–
Hours
%SR215 (R)
UTC
–
Date
%SR216 (R)
UTC
–
Month
%SR217 (R)
UTC
–
Year
