GE Multilin D30 Line Distance Protection System 5-1895 SETTINGS 5.7 CONTROL ELEMENTS5Figure 5–101: ACKNOWLEDGE MODEAPPLICATION EXAMPLEConsider an application where the selector switch is used to control setting groups 1 through 4 in the relay. The settinggroups are to be controlled from both user-programmable pushbutton 1 and from an external device via contact inputs 1through 3. The active setting group shall be available as an encoded three-bit word to the external device and SCADA viaoutput contacts 1 through 3. The pre-selected setting group shall be applied automatically after 5 seconds of inactivity ofthe control inputs. When the relay powers up, it should synchronize the setting group to the three-bit control input.Make the following changes to setting group control in the SETTINGS CONTROL ELEMENTS SETTING GROUPS menu:SETTING GROUPS FUNCTION: “Enabled” GROUP 4 ACTIVATE ON: “SELECTOR 1 POS 4"SETTING GROUPS BLK: “Off” GROUP 5 ACTIVATE ON: “Off”GROUP 2 ACTIVATE ON: “SELECTOR 1 POS 2" GROUP 6 ACTIVATE ON: “Off”GROUP 3 ACTIVATE ON: “SELECTOR 1 POS 3"Make the following changes to selector switch element in the SETTINGS CONTROL ELEMENTS SELECTOR SWITCH SELECTOR SWITCH 1 menu to assign control to user programmable pushbutton 1 and contact inputs 1 through 3:842736A1.CDRSTEP-UPACK3BIT A03BIT A13BIT A23BIT ACKPOS 1POS 2POS 3POS 4POS 5POS 6POS 7BIT 0BIT 1BIT 2pre-existingposition 2changed to 4 witha pushbuttonchanged to 1 witha 3-bit inputchanged to 2 witha pushbuttonSTP ALARMBIT ALARMALARM
