181MRS 755539Feeder Protection RelayOperator’s Manual - ANSI VersionREF 6103.1.11.1. Target LED for front communication• Target off:Rear communication is currently selected• Lit target:Front communication port is currently selected• Blinking target:Front communication port is currently selected and the relay is communicating3.1.12. How to select the protocol for rear communicationWhen REF 610 is provided with a communication module for the built-incommunication protocols, it allows you to choose the communication protocol forrear connection. If REF 610 is equipped with a protocol specific communicationmodule, no communication protocol selections are allowed. The protocol is thendefined by the communication module. The selected protocol is stored in the non-volatile memory and will therefore be activated automatically after an interruptionin the auxiliary voltage.Select the rear communication protocol as follows:1. Press an arrow button to access the main menu.2. Use the arrow buttons to select CONFIGURATION\COMMUNICATION\REARPROTOCOL and press . The cursor will be at the setting currently in use (e.g.SPA).3. Press to enter the setting mode. The second line will start to flash.4. Use or to select the desired setting.5. Press to confirm the selection.6. Press to return the display to the idle mode.Fig. 3.1.12.-1 Selecting the communication protocol for rear connectionMain Menu Group Menu Parameter MenuMEASUREMENTSRECORDED DATAOPERATIONSETTINGSCONFIGURATIONINFOCONFIGURATIONFUNCTION TEST/DICOMMUNICATIONLANGUAGEMEMORY SETTINGSFREQUENCYPASSWORD HMITIMETRIP CIRCUIT SUPCONFIGURATIONSPA ConfirmCancelProtocalREF610_BCONFIGURATIONREAR CONNECTIONREAR PROTOCALREAR COM. MODULESPA SETTINGSIEC103 SETTINGSMODBUS SETTINGSUNIT ADDRESSCOUNTERLINE-IDLE STATECONNECTION TYPEIEC 60870-5-103MODBUS RTUMODBUS ASCIICOM. MODULE