4 Special Functions
3-100 SmartAXIS Touch User's Manual
4.18 Daylight Savings Time
This section describes the function that automatically adjusts the Touch real time clock according to the daylight
savings time settings.
● Feature Description
For regions where the Touch is used that implement daylight savings time, this function can automatically adjust the
Touch clock using the daylight savings time settings. When the time becomes the daylight savings time start time, the
clock is set an hour forward. When the time becomes the the daylight savings time end time, the clock is set an hour
back.
The Touch adjusts the clock for daylight savings time on the start day and the end day. However, the clock is also
adjusted for daylight savings time under the following conditions.
• When a ladder program or FBD program was downloaded to the Touch.
• When the Touch power is turned on.
When the current time of the Touch internal clock is set using System Area or special data registers, the time is not
adjusted for daylight savings time, even if the time after it was set is within the daylight savings time period. Set the
clock to the time adjusted for daylight savings time. The set date and time becomes the date and time after being
adjusted for daylight savings time.
●
Procedure
Configure daylight savings time on the Touch.
1 On the WindO/I-NV3 View tab, in the Workspace group, click (Control Function).
WindLDR starts.
2 On the WindLDR Configuration tab, in the Function Area Settings group, click Calendar & Clock.
The Function Area Settings dialog box is displayed.
3 Select the Enable Daylight Saving Time check box.
4 Configure the start time and the end time. Specify the region using the Region list box.
If you select Custom, you are able to select any desired start time and end time.
5 Click OK.
This concludes configuring the settings.
Region Start time End time
Custom User specified User specified
USA or Canada March, 2nd Sunday, 2:00 AM November, 1st Sunday, 2:00 AM
Europe March, last Sunday, 1:00 AM October, last Sunday, 1:00 AM
Australia October, 1st Sunday, 2:00 AM April, 1st Sunday, 3:00 AM
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