GE B90 Instruction Manual

Also see for B90: Communications manual Communications guide Instruction manual Instruction manual Instruction manual

Contents

5-32 B90 Low Impedance Bus Differential System GE Multilin5.2 PRODUCT SETUP 5 SETTINGS5The B90 supports the IEC 60870-5-104 protocol. The B90 can be used as an IEC 60870-5-104 slave device connected toa maximum of two masters (usually either an RTU or a SCADA master station). Since the B90 maintains two sets of IEC60870-5-104 data change buffers, no more than two masters should actively communicate with the B90 at one time.Do not set more than one protocol to the same TCP/UDP port number, as this results in unreliable operation ofthose protocols.The IEC ------- DEFAULT THRESHOLD settings are used to determine when to trigger spontaneous responses containingM_ME_NC_1 analog data. These settings group the B90 analog data into types: current, voltage, power, energy, and other.Each setting represents the default threshold value for all M_ME_NC_1 analog points of that type. For example, to triggerspontaneous responses from the B90 when any current values change by 15 A, the IEC CURRENT DEFAULT THRESHOLD set-ting should be set to 15. Note that these settings are the default values of the deadbands. P_ME_NC_1 (parameter of mea-sured value, short floating point value) points can be used to change threshold values, from the default, for each individualM_ME_NC_1 analog point. Whenever power is removed and re-applied to the B90, the default thresholds will be in effect.The IEC REDUNDANCY setting decides whether multiple client connections are accepted or not. If redundancy is set to Yes,two simultaneous connections can be active at any given time.The B90 relay does not support power metering. As such, the IEC POWER DEFAULT THRESHOLD setting is not appli-cable.The B90 relay does not support energy metering. As such, the IEC ENERGY DEFAULT THRESHOLD setting is not appli-cable.The IEC 60870-5-104 and DNP protocols cannot be used simultaneously. When the IEC 60870-5-104 FUNCTIONsetting is set to “Enabled”, the DNP protocol will not be operational. When this setting is changed it will not becomeactive until power to the relay has been cycled (off-to-on).k) SNTP PROTOCOLPATH: SETTINGS  PRODUCT SETUP  COMMUNICATIONS  SNTP PROTOCOLThe B90 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the B90 can obtain clock timeover an Ethernet network. The B90 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 B90 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 B90 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 B90 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 B90 clock is closely synchronized withthe SNTP/NTP server. It may take up to two minutes for the B90 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”. TheB90 then listens to SNTP messages sent to the “all ones” broadcast address for the subnet. The B90 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. SNTP PROTOCOLSNTP 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 1NOTENOTENOTENOTE