5-20 L90 Line Current Differential System GE Multilin5.2 PRODUCT SETUP 5 SETTINGS5Selected records can be cleared from user-programmable conditions with FlexLogic operands. Assigning user-programma-ble pushbuttons to clear specific records are typical applications for these commands. Since the L90 responds to risingedges of the configured FlexLogic operands, they must be asserted for at least 50 ms to take effect.Clearing records with user-programmable operands is not protected by the command password. However, user-program-mable pushbuttons are protected by the command password. Thus, if they are used to clear records, the user-programma-ble pushbuttons can provide extra security if required.For example, to assign user-programmable pushbutton 1 to clear demand records, the following settings should be applied.1. Assign the clear demand function to pushbutton 1 by making the following change in the SETTINGS PRODUCT SETUP CLEAR RELAY RECORDS menu:CLEAR DEMAND: “ PUSHBUTTON 1 ON ”2. Set the properties for user-programmable pushbutton 1 by making the following changes in the SETTINGS PRODUCTSETUP USER-PROGRAMMABLE PUSHBUTTONS USER PUSHBUTTON 1 menu:PUSHBUTTON 1 FUNCTION: “Self-reset”PUSHBTN 1 DROP-OUT TIME: “0.20 s”5.2.5 COMMUNICATIONSa) MAIN MENUPATH: SETTINGS PRODUCT SETUP COMMUNICATIONSMESSAGE CLEAR DEMAND:OffRange: FlexLogic operandMESSAGE CLEAR CHNL STATUS:OffRange: FlexLogic operandMESSAGE CLEAR ENERGY:OffRange: FlexLogic operandMESSAGE RESET UNAUTH ACCESS:OffRange: FlexLogic operand COMMUNICATIONS SERIAL PORTS See below.MESSAGE NETWORK See page 5–23.MESSAGE MODBUS PROTOCOL See page 5–24.MESSAGE DNP PROTOCOL See page 5–25.MESSAGE DNP / IEC104 POINT LISTS See page 5–28.MESSAGE IEC 61850 PROTOCOL See page 5–29.MESSAGE WEB SERVER HTTP PROTOCOL See page 5–42.MESSAGE TFTP PROTOCOL See page 5–42.MESSAGE IEC 60870-5-104 PROTOCOL See page 5–43.
