GE Multilin L90 Line Current Differential System 5-435 SETTINGS 5.2 PRODUCT SETUP5The Trivial File Transfer Protocol (TFTP) can be used to transfer files from the L90 over a network. The L90 operates as aTFTP server. TFTP client software is available from various sources, including Microsoft Windows NT. The dir.txt fileobtained from the L90 contains a list and description of all available files (event records, oscillography, etc.).k) IEC 60870-5-104 PROTOCOLPATH: SETTINGS PRODUCT SETUP COMMUNICATIONS IEC 60870-5-104 PROTOCOLThe L90 supports the IEC 60870-5-104 protocol. The L90 can be used as an IEC 60870-5-104 slave device connected to amaximum of two masters (usually either an RTU or a SCADA master station). Since the L90 maintains two sets of IEC60870-5-104 data change buffers, no more than two masters should actively communicate with the L90 at one time.The IEC ------- DEFAULT THRESHOLD settings are used to determine when to trigger spontaneous responses containingM_ME_NC_1 analog data. These settings group the L90 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 L90 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 L90, the default thresholds are in effect.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 does not operate. When this setting is changed, it takes effect whenpower to the relay is cycled (off-to-on). IEC 60870-5-104 PROTOCOLIEC 60870-5-104FUNCTION: DisabledRange: Enabled, DisabledMESSAGE IEC TCP PORTNUMBER: 2404Range: 0 to 65535 in steps of 1MESSAGE IEC NETWORK CLIENT ADDRESSESMESSAGE IEC COMMON ADDRESSOF ASDU: 0Range: 0 to 65535 in steps of 1MESSAGE IEC CYCLIC DATAPERIOD: 60 sRange: 1 to 65535 s in steps of 1MESSAGE IEC CURRENT DEFAULTTHRESHOLD: 30000Range: 0 to 65535 in steps of 1MESSAGE IEC VOLTAGE DEFAULTTHRESHOLD: 30000Range: 0 to 65535 in steps of 1MESSAGE IEC POWER DEFAULTTHRESHOLD: 30000Range: 0 to 65535 in steps of 1MESSAGE IEC ENERGY DEFAULTTHRESHOLD: 30000Range: 0 to 65535 in steps of 1MESSAGE IEC OTHER DEFAULTTHRESHOLD: 30000Range: 0 to 65535 in steps of 1NOTE
