Siemens SIMATIC HMI Operating Instructions Manual page 148

Configuring the operating system
6.6 Changing HMI device settings
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③
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Procedure
Proceed as follows:
1. Select the appropriate time zone for the HMI device from the "Time Zone" selection box.
2. Touch the "Apply" button to confirm your entry.
3. Set the date in the selection box.
4. Set the current time of day in the "Current Time" text box.
5. Touch the "Apply" button to confirm your input.
Note
The system does not automatically switch between winter and summer time.
1. If you want to switch from winter to summer time, select the
"Daylight savings time currently in effect" check box.
2. If you want to switch from summer to winter time, clear the
"Daylight savings time currently in effect" check box.
3. Confirm your entries.
The dialog closes.
Result
The settings for the data and time of day have now been changed.
Internal clock
The HMI device has an internal buffered clock.
Synchronizing the date and time with the PLC
The date and time of the HMI device can be synchronized with the PLC if this has been
configured in the project and the PLC program.
Additional information on this subject is available in the "WinCC flexible" system manual.
148
Time zone selection box
Text box for the time
Date selection box
"Daylight savings" check box
Button for applying changes
The time of day shown in the "Current Time" box is adjusted correspondingly to the
selected time zone.
The values you have set are now in effect.
When you press the "Apply" button, the time is brought forward by one hour.
When you press the "Apply" button, the time is moved backwards by one hour.
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01