7-6 N60 Network Stability and Synchrophasor Measurement System GE Multilin7.2 TARGETS 7 COMMANDS AND TARGETS77.2TARGETS 7.2.1 TARGETS MENUEach N60 element with a TARGET setting has a target message that when activated by its element is displayed insequence with any other currently active target messages in the TARGETS menu. In the example shown, the Phase TOC4and Digital Element 48 target settings are active and so have their targets displayed. The down arrow below the two ele-ments indicates that there can be other active elements beyond these two.For more information, see the description of target messages in the next section, and the Introduction to Elements sectionin the Settings chapter for instructions on TARGET setting.When no targets are active, the display reads NO ACTIVE TARGETS.7.2.2 TARGET MESSAGESWhen there are no active targets, the first target to become active will cause the display to immediately default to that mes-sage. If there are active targets and the user is navigating through other messages, and when the default message timertimes out (i.e. the keypad has not been used for a determined period of time), the display will again default back to the tar-get message.The range of variables for the target messages is described below. Phase information will be included if applicable. If a tar-get message status changes, the status with the highest priority will be displayed.If a self test error is detected, a message appears indicating the cause of the error. For example UNIT NOT PROGRAMMEDindicates that the minimal relay settings have not been programmed.7.2.3 RELAY SELF-TESTSa) DESCRIPTIONThe relay performs a number of self-test diagnostic checks to ensure device integrity. The two types of self-tests (major andminor) are listed in the tables below. When either type of self-test error occurs, the Trouble LED Indicator will turn on and atarget message displayed. All errors record an event in the event recorder. Latched errors can be cleared by pressing theRESET key, providing the condition is no longer present.Major self-test errors also result in the following:• The critical fail relay on the power supply module is de-energized.• All other output relays are de-energized and are prevented from further operation.• The faceplate In Service LED indicator is turned off.TARGETSMESSAGE PHASE TOC4OP: A B -Displayed only if targets for this element are active.Example shown.MESSAGE DIGITAL ELEMENT 48:LATCHEDDisplayed only if targets for this element are active.Example shown.MESSAGETable 7–1: TARGET MESSAGE PRIORITY STATUSPRIORITY ACTIVE STATUS DESCRIPTION1 OP element operated and still picked up2 PKP element picked up and timed out3 LATCHED element had operated but has dropped out
