
Errorhandlinganddiagnostics
5.2 LEDsofthepowersupplyunit(CX21000xx4)inKbus
mode
Afterswitchingon,thepowersupplyimmediatelycheckstheconnectedBusTerminalconfiguration.IfKbus
terminalsaredetected,theerrorfreebootupissignaledbythered“I/OERRLED”goingout.Ifthe“I/OERR”
LEDblinks,anerrorintheareaoftheterminalsisindicated.Theerrorcodecanbedeterminedfromthe
frequencyandnumberofblinks.Thispermitsrapidrectificationoftheerror.
Display LED Meaning
Us24V PowersupplyfortheCPUmodule.TheLEDlights
greenifthepowersupplyiscorrect.
Up24V Powersupplyforterminalbus.TheLEDlightsgreenif
thepowersupplyiscorrect.
KBUS
RUN
Kbusdiagnostics.ThegreenLEDlightsupinorderto
indicatefaultfreeoperation."Faultfree"meansthat
thecommunicationwiththefieldbussystemisalso
running.
KBUS
ERR
Kbusdiagnostics.TheredLEDflashestoindicatean
error.TheredLEDblinkswithtwodifferent
frequencies.
Table1:TheI/OerrorLEDblinkcode
fastblinking Startoftheerrorcode
Firstslowsequence Errorcode
Secondslowsequence Errorcodeargument
CX210000x4 37Version1.0
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