GE Multilin D30 Line Distance Relay 5-275 SETTINGS 5.2 PRODUCT SETUP5The D30 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the D30 can obtain clock timeover an Ethernet network. The D30 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. Both unicast and broadcast SNTP are supported.If SNTP functionality is enabled at the same time as IRIG-B, the IRIG-B signal provides the time value to the D30 clock foras long as a valid signal is present. If the IRIG-B signal is removed, the time obtained from the SNTP server is used. Ifeither SNTP or IRIG-B is enabled, the D30 clock value cannot be changed using the front panel keypad.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 D30 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 D30 clock is closely synchronized withthe SNTP/NTP server. It may take up to two minutes for the D30 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”. TheD30 then listens to SNTP messages sent to the “all ones” broadcast address for the subnet. The D30 waits up to eighteenminutes (>1024 seconds) without receiving an SNTP broadcast message before signaling an SNTP self-test error.The UR-series relays do not support the multicast or anycast SNTP functionality.5.2.5 MODBUS USER MAPPATH: SETTINGS Ö PRODUCT SETUP ÖØ MODBUS USER MAPThe Modbus User Map provides read-only access for up to 256 registers. To obtain a memory map value, enter the desiredaddress in the ADDRESS line (this value must be converted from hex to decimal format). The corresponding value is dis-played in the VALUE line. A value of “0” in subsequent register ADDRESS lines automatically returns values for the previousADDRESS lines incremented by “1”. An address value of “0” in the initial register means “none” and values of “0” will be dis-played for all registers. Different ADDRESS values can be entered as required in any of the register positions. MODBUS USER MAPADDRESS 1: 0VALUE: 0Range: 0 to 65535 in steps of 1MESSAGE ADDRESS 2: 0VALUE: 0Range: 0 to 65535 in steps of 1↓MESSAGE ADDRESS 256: 0VALUE: 0Range: 0 to 65535 in steps of 1
