CHAPTER 5: SETTINGS PRODUCT SETUPM60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 5-855In unusual cases where the length of the link is different in different directions, set this setting to the number ofnanoseconds the Ethernet propagation delay to the relay is longer than the mean of path propagation delays to and fromthe relay. For instance, if it is known say from the physical length of the fibers and the propagation speed in the fibers thatthe delay from the relay to the Ethernet switch it is connected to is 9000 ns and that the delay from the switch to the relayis 11000 ns, then the mean delay is 10000 ns, and the path delay asymmetry is 11000 - 10000 = +1000 ns.5.3.6.3 SNTP protocolSETTINGS PRODUCT SETUP REAL TIME CLOCK SNTP PROTOCOLThe M60 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the M60 can obtain clock time overan Ethernet network. The M60 acts as an SNTP client to receive time values from an SNTP/NTP server, usually a dedicatedproduct using a GPS receiver. Unicast SNTP is supported. The UR series relays do not support the broadcast, multicast, oranycast SNTP functionality.The SNTP FUNCTION setting enables or disables the SNTP feature on the M60.To use SNTP, set SNTP SERVER IP ADDR to the SNTP/NTP server IP address. Once this address is set and SNTP FUNCTION is“Enabled,” the M60 attempts to obtain time values from the SNTP/NTP server. Since many time values are obtained andaveraged, it generally takes three to four minutes until the M60 clock is closely synchronized with the SNTP/NTP server. Ittakes up to two minutes for the M60 to signal an SNTP self-test error if the server is offline.The SNTP UDP PORT NUMBER is 123 for normal SNTP operation. If SNTP is not required, close the port by setting the portnumber to 0, after which the change takes effect when the M60 is restarted.5.3.6.4 Local timeSETTINGS PRODUCT SETUP REAL TIME CLOCK LOCAL TIME SNTP PROTOCOL SNTP FUNCTION:DisabledRange: Enabled, Disabled SNTP SERVER IP ADDR:0.0.0.0Range: standard IP address format SNTP UDP PORTNUMBER: 123Range: 0 to 65535 in steps of 1NOTEDo not set more than one protocol to the same TCP/UDP port number, as this results in unreliable operation ofthose protocols. LOCAL TIME LOCAL TIME OFFSETFROM UTC: 0.0 hrRange: –24.0 to 24.0 hr in steps of 0.5 DAYLIGHT SAVINGSTIME: DisabledRange: Disabled, Enabled DST START MONTH:JanuaryRange: January to December (all months) DST START DAY:SundayRange: Sunday to Saturday (all days of the week) DST START DAYINSTANCE: FirstRange: First, Second, Third, Fourth, Last DST START HOUR:2:00Range: 0:00 to 23:00 DST STOP MONTH:JanuaryRange: January to December (all months) DST STOP DAY:SundayRange: Sunday to Saturday (all days of the week)
