GE G30 Instruction Manual page 209

5 SETTINGS
c) SNTP PROTOCOL

PATH: SETTINGS PRODUCT SETUP
 SNTP PROTOCOL

MESSAGE
MESSAGE
The G30 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the G30 can obtain clock time
over an Ethernet network. The G30 acts as an SNTP client to receive time values from an SNTP/NTP server, usually a ded-
icated product using a GPS receiver to provide an accurate time. UR series relays support unicast, broadcast, multicast,
and anycast SNTP functionality.
The setting enables or disabled the SNTP feature on the G30.
SNTP FUNCTION
To use SNTP in unicast mode,
set and is "Enabled," the G30 attempts to obtain time values from the SNTP/NTP server. Since many time
SNTP FUNCTION
values are obtained and averaged, it generally takes three to four minutes until the G30 clock is closely synchronized with
the SNTP/NTP server. It takes up to two minutes for the G30 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
G30 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The G30 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
When the
SNTP UDP PORT NUMBER
NOTE
d) LOCAL TIME

PATH: SETTINGS PRODUCT SETUP
 LOCAL TIME

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
GE Multilin
 
REAL TIME CLOCK
SNTP FUNCTION:
Disabled
SNTP SERVER IP ADDR:
0.0.0.0
SNTP UDP PORT
NUMBER: 123
must be set to the SNTP/NTP server IP address. Once this address is
SNTP SERVER IP ADDR
SNTP SERVER IP ADDR
is 123 for normal SNTP operation. If SNTP is not required, close the port by setting it to 0.
is set to 0, the change takes effect when the G30 is restarted.
 
REAL TIME CLOCK
LOCAL TIME OFFSET
FROM UTC: 0.0 hrs
DAYLIGHT SAVINGS
TIME: Disabled
DST START MONTH:
January
DST START DAY:
Sunday
DST START DAY
INSTANCE: First
DST START HOUR:
2
DST STOP MONTH:
January
DST STOP DAY:
Sunday
DST STOP DAY
INSTANCE: First
DST STOP HOUR:
2
G30 Generator Protection System
SNTP PROTOCOL
Range: Enabled, Disabled
Range: Standard IP address format
Range: 0 to 65535 in steps of 1
setting to "0.0.0.0" and
SNTP FUNCTION
LOCAL TIME
Range: –24.0 to 24.0 hrs in steps of 0.5
Range: Disabled, Enabled
Range: January to December (all months)
Range: Sunday to Saturday (all days of the week)
Range: First, Second, Third, Fourth, Last
Range: 0 to 23
Range: January to December (all months)
Range: Sunday to Saturday (all days of the week)
Range: First, Second, Third, Fourth, Last
Range: 0 to 23
5.2 PRODUCT SETUP
to "Enabled." The
5
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