User manual

Diagnostics and Troubleshooting ILX34-AENWG ♦ Point I/O Platform
User Manual Wireless POINT I/O Adapter
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Page108of209 ProSoftTechnology,Inc.
 September19,2011
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4.5 Empty Slots and RIUP Situations
ThePOINTI/Osystemdoesnothavetheabilitytodetectanemptyterminalbase.Becauseof
this,therearenumeroussituationsinwhichyoucanpotentiallyconfigureasystemthatis
unusableoronethatexercisesunintendedcontrol.
Inanattempttoaddressthesesituations,youmustobservethefollowing
rulesforPOINTI/O
systemconstructionandtheremovalandreinsertionofmodules.
 AcorrectPOINTI/Osystemdoesnothaveanyemptyterminalbases.
 Afteryoucyclepower,theadapterwillnotrunanyI/Ountilthenumberofmodules
comprisingthechassisequalsthestoredchassis
size.
o Becausetheadaptercannotdetectemptyterminalbases,itcannotassumeanysafe
operationuntilthereisamatchbetweenthenumberofmodulesindicatingtheir
presenceinthechassisandwhattheadapterhassavedinnon‐volatilememory.
o Actualmoduleidentification(suchas,electronickeying)isdonewhenconnection
establishmentrequestsarereceivedfromthecontrollerorcontrollers.
 AmoduleremovedunderpowerdoesnotdisruptoperationoftheotherI/Omodules.
o Whenyouremoveamodule,theadapterdetermineswhatchanged.
o WheneveryouremoveamodulewithanactiveconnectionfromthePOINTI/Osystem,
theadapterindicatesthisbyflashingthePOINTBusStatusLEDredandreportsaminor
recoverablefault.
 Ifmorethanonecontiguousmoduleisremovedunderpower,connectionstoallmodulesin
thecontiguousmissingmodule
setaredisalloweduntilallmodulesarereplaced.Because
theadaptercannotdetectanemptybase,itdoesnotknowthephysicalpositioningofthe
modulesuntilallthemissingmodulesarereplaced.
 Ifamoduleseparatingtwosetsofcontiguousmissingmodulesisremoved,thetwosets
merge
intoasingleset.Allthemodulesmustbereplacedbeforeconnectionsarepermitted
toanymoduleintheset.
 Ifmodulesofdifferenttypesareremovedandreturnedtothewronglocations,attemptsto
connecttothesemoduleswillfailduringverificationoftheelectronicID(providingthat
keying
hasnotbeendisabled).
 Ifmodulesofthesametypeareremovedandreturnedtothewronglocations,theyaccept
connectionsfromthecontrollerorcontrollersandreconfigurewiththecorrectdataonce
theypasstheirelectronickeyingcheck.
 Theseremovalandreturnsituationsexistwhetherthesystem
isunderpowerornot.Ifthe
systemisunderpower,thesituationarisesimmediately.Ifthesystemisnotunderpower,
thesituationarisesinthenextpowercycle.
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