GE Multilin G30 Generator Protection System 5-695 SETTINGS 5.2 PRODUCT SETUP5c) SNTP PROTOCOLPATH: SETTINGS PRODUCT SETUP REAL TIME CLOCK SNTP PROTOCOLThe G30 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the G30 can obtain clock timeover 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 SNTP FUNCTION setting enables or disabled the SNTP feature on the G30.To use SNTP in unicast mode, SNTP SERVER IP ADDR must be set to the SNTP/NTP server IP address. Once this address isset and SNTP FUNCTION is “Enabled,” the G30 attempts to obtain time values from the SNTP/NTP server. Since many timevalues are obtained and averaged, it generally takes three to four minutes until the G30 clock is closely synchronized withthe 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 SNTP SERVER IP ADDR setting to “0.0.0.0” and SNTP FUNCTION to “Enabled.” TheG30 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 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 G30 is restarted.d) LOCAL TIMEPATH: SETTINGS PRODUCT SETUP REAL TIME CLOCK LOCAL TIME SNTP PROTOCOLSNTP FUNCTION:DisabledRange: Enabled, DisabledMESSAGE SNTP SERVER IP ADDR:0.0.0.0Range: Standard IP address formatMESSAGE SNTP UDP PORTNUMBER: 123Range: 0 to 65535 in steps of 1 LOCAL TIMELOCAL TIME OFFSETFROM UTC: 0.0 hrsRange: –24.0 to 24.0 hrs in steps of 0.5MESSAGE DAYLIGHT SAVINGSTIME: DisabledRange: Disabled, EnabledMESSAGE DST START MONTH:JanuaryRange: January to December (all months)MESSAGE DST START DAY:SundayRange: Sunday to Saturday (all days of the week)MESSAGE DST START DAYINSTANCE: FirstRange: First, Second, Third, Fourth, LastMESSAGE DST START HOUR:2Range: 0 to 23MESSAGE DST STOP MONTH:JanuaryRange: January to December (all months)MESSAGE DST STOP DAY:SundayRange: Sunday to Saturday (all days of the week)MESSAGE DST STOP DAYINSTANCE: FirstRange: First, Second, Third, Fourth, LastMESSAGE DST STOP HOUR:2Range: 0 to 23NOTE
