Page 2 - 15Computer SystemElectricalTroubleshooting GuideIRB-6400 M94A2.4.5 System Board DSQC 256ADesignation Color DescriptionSensors 1-3 Yellow Lights when high signals arereceived from sensors 1-3.The LED shines more brightlythe more voltage is input. Thismeans that even if the inputvoltage is just under thevoltage level “1”, the LED willglow dimly.F Red Turns OFF when the boardapproves the initialization.EN Green Turns ON to indicate computersystem is operating.AS Yellow Turns ON when the Run Chain1 circuits up to and includingthe automatic mode safeguardstop (AS) are closed.MS Yellow Turns ON when the Run Chain1 enabling device on the teachpendant is pressed halfwayand the circuits up to andincluding the manual modesafeguard stop (MS) areclosed.GS Yellow Turns ON when the Run Chain1 circuits up to and includingthe general mode safeguardstop (GS) are closed.ES Yellow Turns ON when the Run Chain1 circuits up to and includingthe emergency stop (ES) areclosed.LIM Yellow Turns ON when all circuitsand limit switches are closed.The left LED indicates thestatus of Run chain 1 and theright of Run chain 2.ERR Red Turns ON when one, but notthe other KM1 or KM2 relay isenergized.Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
