GE Multilin F60 Feeder Protection System 5-495 SETTINGS 5.2 PRODUCT SETUP5A dedicated FlexLogic™ operand, LED TEST IN PROGRESS, is set for the duration of the test. When the test sequence is ini-tiated, the LED TEST INITIATED event is stored in the event recorder.The entire test procedure is user-controlled. In particular, stage 1 can last as long as necessary, and stages 2 and 3 can beinterrupted. The test responds to the position and rising edges of the control input defined by the LED TEST CONTROL set-ting. The control pulses must last at least 250 ms to take effect. The following diagram explains how the test is executed.Figure 5–4: LED TEST SEQUENCEAPPLICATION EXAMPLE 1:Assume one needs to check if any of the LEDs is “burned” through user-programmable pushbutton 1. The following set-tings should be applied. Configure user-programmable pushbutton 1 by making the following entries in the SETTINGS PRODUCT SETUP USER-PROGRAMMABLE PUSHBUTTONS USER PUSHBUTTON 1 menu:PUSHBUTTON 1 FUNCTION: “Self-reset”PUSHBTN 1 DROP-OUT TIME: “0.10 s”Configure the LED test to recognize user-programmable pushbutton 1 by making the following entries in the SETTINGS PRODUCT SETUP USER-PROGRAMMABLE LEDS LED TEST menu:LED TEST FUNCTION: “Enabled”LED TEST CONTROL: “ PUSHBUTTON 1 ON ”The test will be initiated when the user-programmable pushbutton 1 is pressed. The pushbutton should remain pressed foras long as the LEDs are being visually inspected. When finished, the pushbutton should be released. The relay will thenautomatically start stage 2. At this point forward, test may be aborted by pressing the pushbutton.APPLICATION EXAMPLE 2:Assume one needs to check if any LEDs are “burned” as well as exercise one LED at a time to check for other failures. Thisis to be performed via user-programmable pushbutton 1.842011A1.CDRREADY TO TESTStart the software image ofthe LEDsSTAGE 1(all LEDs on)control input is onWait 1 seconddropping edge of thecontrol inputRestore the LED statesfrom the software imagerising edge of thecontrol inputSTAGE 2(one LED on at a time)STAGE 3(one LED off at a time)rising edgeof the controlinputrising edge of thecontrol inputSet theLED TEST IN PROGRESSoperandReset theLED TEST IN PROGRESSoperandrising edge of thecontrol inputWait 1 second rising edge of thecontrol inputtime-out(1 minute)
