GE C70, Instruction Manual

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5-68 C70 Capacitor Bank Protection and Control System GE Multilin
5.2 PRODUCT SETUP 5 SETTINGS
5
To use SNTP in unicast mode,
SNTP SERVER IP ADDR
must be set to the SNTP/NTP server IP address. Once this address is
set and
SNTP FUNCTION
is “Enabled,” the C70 attempts to obtain time values from the SNTP/NTP server. Since many time
values are obtained and averaged, it generally takes three to four minutes until the C70 clock is closely synchronized with
the SNTP/NTP server. It takes up to two minutes for the C70 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
SNTP SERVER IP ADDR
setting to “0.0.0.0” and
SNTP FUNCTION
to “Enabled.” The
C70 then listens to SNTP messages sent to the “all ones” broadcast address for the subnet. The C70 waits up to 18 min-
utes (>1024 seconds) without receiving an SNTP broadcast message before signaling an SNTP self-test error.
The
SNTP UDP PORT NUMBER
is 123 for normal SNTP operation. If SNTP is not required, close the port by setting it to 0.
When the
SNTP UDP PORT NUMBER
is set to 0, the change takes effect when the C70 is restarted.
d) LOCAL TIME
PATH: SETTINGS

PRODUCT SETUP

REAL TIME CLOCK

LOCAL TIME
The UR device maintains two times: local time and Universal Coordinated Time (UTC). Local time can be provided by IRIG-
B signals. UTC time is provided by SNTP servers.
The real-time clock (RTC) and time stamps reported in historical records and communication protocols can be incorrect if
the Local Time settings are not configured properly.
See the IRIG-B section in the Installation chapter for guidance on these settings when using an IRIG-B source that sets the
IRIG-B control bits according to IEEE Std 1344-1995.
The
LOCAL TIME OFFSET FROM UTC
setting is used to specify the local time zone offset from UTC (Greenwich Mean Time) in
hours. Time zones in the eastern hemisphere have positive values; time zones in the western hemisphere have negative
values. A value of zero causes the relay to use UTC for local time. This setting has two uses. When the system RTC is syn-
chronized with a communications protocol providing only local time or it is free-running, the offset setting is used to calcu-
late UTC from the local time these provide. When the RTC is synchronized with a communications protocol providing only
UTC (such as PTP or SNTP), the time offset setting is used to determine local time from the UTC provided. PTP
ALTERNATE_TIME_OFFSET_INDICATOR TLVs are not used to calculate local time.

LOCAL TIME

LOCAL TIME OFFSET
FROM UTC: 0.0 hrs
Range: –24.0 to 24.0 hrs in steps of 0.5
MESSAGE
DAYLIGHT SAVINGS
TIME: Disabled
Range: Disabled, Enabled
MESSAGE
DST START MONTH:
January
Range: January to December (all months)
MESSAGE
DST START DAY:
Sunday
Range: Sunday to Saturday (all days of the week)
MESSAGE
DST START DAY
INSTANCE: First
Range: First, Second, Third, Fourth, Last
MESSAGE
DST START HOUR:
2
Range: 0 to 23
MESSAGE
DST STOP MONTH:
January
Range: January to December (all months)
MESSAGE
DST STOP DAY:
Sunday
Range: Sunday to Saturday (all days of the week)
MESSAGE
DST STOP DAY
INSTANCE: First
Range: First, Second, Third, Fourth, Last
MESSAGE
DST STOP HOUR:
2
Range: 0 to 23
NOTE