User's Manual

Table Of Contents
PROOFPROOF
DiagnosticsCenter
DX,PC,DIAG,CANVALUES-19-22DEC15-1/1
CANBusValues
NetworkStatus
Active
Systemisworkingasexpected.Inadditiontodisplay,
atleastonecontrollerisconnectedandcommunicating
onCANBus.
Inactive
Displayisnotcommunicatingwithanyothercontrollers
onCANBus.IfdisplayisonlycontrolleronCANBus,
TotalMessageCountincreases,butNetworkStatusis
inactive.
TotalMessageCount
Totalmessagecountisnumberofmessagessentover
CANBus.Whenmachineisrunning,thisvaluecounts
upcontinuouslysincetherearealwaysmessagessent
onCANBus.
CANHighandCANLowVoltage
Peakvoltageishighestaveragevoltagethathasoccurred
sincelastcoldboot.Voltagemeasurementsareaveraged
foreachsecond.PeakCANHighandPeakCANLow
voltagesnormallyrangebetween1.8and3.3Volts.
NOTE:Acoldbootoccursafterdisplayhasbeen
offfor24hoursorafterunswitchedpowerhas
beendisconnectedfromdisplay.
BusUtilization
InformationonCANBusissentinmessagesbetween
controllers.TheJohnDeereimplementCANBusis
runningatabaudrateof250kbd,meaningitcanswitch
powerupto256,000timespersecondtotransmit
messages.ThisisaBusutilizationof100%.
Ifacontroller,suchasanimplement,isnotrunningas
expected,aBusutilizationof45%orhighercouldbea
reasonfortheissue.Somedevicescannotsendand
receiveallnecessarymessagesduetohighBusload.
NOTE:SomeISOBUSimplementsdonotworkwith
Busloadshigherthan25%.
AworkingStarFire™ReceivercausesaBus
loadofabout5—7%.
UnpluggingimplementsorGPSreceivers
canreduceBusutilization.
BaudRate
BaudRateindicateshowfasttheBusisworking.ISOBUS
andJohnDeereimplementBusarerunningatarateof
250kbd.Anycontrollerconnectedtothissystemmust
workat250kbd,otherwiseitwillnotfunctionproperly.
CANBusStateandErrorCounts
FourCANBusstatesarepossible:
ActiveCANBusisrunningwithoutanyproblems.
PassivePassiveerrorshaveoccurred.
WarnBusWarnerrorshaveoccurred.
OffBusOfferrorshaveoccurred.
Ifoneoftheseerrorsoccurs,displayrecordsnumberof
timesithappens.
PassiveErrorCount
Ifvaluecountsuphigherthanzero,acontrolleronCAN
Busdidnotreceiveallmessages.Importantinformation
mighthavebeenlost.Thisismostlikelyduetohigh
CANBusUtilization.
BUSWarnCount
Ifvaluecountsuphigherthanzero,acontrolleronCAN
Bushasissues.
BUSOffCount
Ifvaluecountsuphigherthanzero,acontrolleron
CANBushasissues.Itmissedacertainnumberof
messagesanddoesnotreceivemessagesanymore.
Importantinformationhasbeenlost.Itmostlikely
occursincombinationwithhighCANBusUtilization.
OverrunErrorCount
OverrunErrorCountindicatesthatapplicationsor
controllersonCANBusreceivemessagesfaster
thantheycanprocessthem.Thisresultsinmissing
messagesandmalfunctionofthesystem.Itmostlikely
occursincombinationwithhighCANBusUtilization.
StarFireisatrademarkofDeere&Company
07-5
102616
PN=86