Date And Time Configuration; Time Zone Compensation; Daylight Saving Time Compensation - GE MiCOM P747 Agile Technical Manual

Chapter 4 - Configuration
4

DATE AND TIME CONFIGURATION

The Date and Time setting will normally be updated automatically by the chosen UTC (Universal Time Co-
ordination) time synchronisation mechanism when the device is in service. This does not mean that you
should dispense with configuring the date and time parameters during commissioning. It is desirable to have
the correct date and time represented for the commissioning process, therefore this should be the first item
to configure during the commissioning process.
The date and time is set in the Date/Time cell in the DATE AND TIME column.
4.1

TIME ZONE COMPENSATION

The UTC time standard uses Greenwich Mean Time as its standard. Without compensation, this would be
the date and time that would be displayed on the device irrespective of its location.
It is obviously desirable for the device to display the local time corresponding to its geographical location. For
this reason, it is possible to compensate for any difference between the local time and the UTC time. This is
achieved with the settings LocalTime Enable and LocalTime Offset.
The LocalTime Enable has three setting options; Disabled, Fixed, and Flexible.
With Disabled, no local time zone is maintained. Time synchronisation from any interface will be used to
directly set the master clock. All times displayed on all interfaces will be based on the master clock with no
adjustment.
With Fixed, a local time zone adjustment is defined using the LocalTime Offset setting and all non-
IEC 61850 interfaces (which uses SNTP) are compensated to display the local time.
With Flexible, a local time zone adjustment is defined using the LocalTime Offset setting and the non-
local and non-IEC 61850 interfaces can be set to either the UTC zone or the local time zone. The local
interfaces are always set to the local time zone and the Ethernet interface is always set to the UTC zone.
The interfaces where you can select between UTC and Local Time are the serial interfaces RP1, RP2, DNP
over Ethernet (if applicable) and Tunnelled Courier (if applicable). This is achieved by means of the following
settings:
● RP1 Time Zone
● RP2 Time Zone
● DNPOE Time Zone
● Tunnel Time Zone
The LocalTime Offset setting allows you to enter the local time zone compensation from -12 to + 12 hours
at 15 minute intervals.
4.2

DAYLIGHT SAVING TIME COMPENSATION

It is possible to compensate for Daylight Saving time using the following settings
● DST Enable
● DST Offset
● DST Start
● DST Start Day
● DST Start Month
● DST Start Mins
● DST End
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MiCOM P747
P747-TM-EN-1
P747-TM-EN-1.1