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Table 131 Configuration > System > Date/Time (continued)
LABEL
End Date
Offset
Apply
Reset
24.4.1 Pre-defined NTP Time Servers List
When you turn on the NXC for the first time, the date and time start at 2003-01-01 00:00:00. The
NXC then attempts to synchronize with one of the following pre-defined list of Network Time
Protocol (NTP) time servers.
The NXC continues to use the following pre-defined list of NTP time servers if you do not specify a
time server or it cannot synchronize with the time server you specified.
Table 132 Default Time Servers
0.pool.ntp.org
1.pool.ntp.org
2.pool.ntp.org
When the NXC uses the pre-defined list of NTP time servers, it randomly selects one server and
tries to synchronize with it. If the synchronization fails, then the NXC goes through the rest of the
list in order from the first one tried until either it is successful or all the pre-defined NTP time
servers have been tried.
24.4.2 Time Server Synchronization
Click the Synchronize Now button to get the time and date from the time server you specified in
the Time Server Address field.
NXC2500 User's Guide
DESCRIPTION
Configure the day and time when Daylight Saving Time ends if you selected Enable
Daylight Saving. The at field uses the 24 hour format. Here are a couple of examples:
Daylight Saving Time ends in the United States on the first Sunday of November. Each
time zone in the United States stops using Daylight Saving Time at 2 A.M. local time. So
in the United States you would select First, Sunday, November and type 2 in the at
field.
Daylight Saving Time ends in the European Union on the last Sunday of October. All of
the time zones in the European Union stop using Daylight Saving Time at the same
moment (1 A.M. GMT or UTC). So in the European Union you would select Last,
Sunday, October. The time you type in the at field depends on your time zone. In
Germany for instance, you would type 2 because Germany's time zone is one hour
ahead of GMT or UTC (GMT+1).
Specify how much the clock changes when daylight saving begins and ends.
Enter a number from 1 to 5.5 (by 0.5 increments).
For example, if you set this field to 3.5, a log occurred at 6 P.M. in local official time will
appear as if it had occurred at 10:30 P.M.
Click Apply to save your changes back to the NXC.
Click Reset to return the screen to its last-saved settings.
Chapter 24 System
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