英文材料部分

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1、ThefollowingpagescontainsadescriptionofeachofthemainsystemcomponentsoftheDataChiefC20Alarmandmonitoringsystem.Thefollowingsystemcomponentsaredescribed:・Remoteoperatorstation-LocalOperatorStations-WatchBridgeUnit-WatchCabinUnit-DistributedProcessingUnits・GatewaysL4.1

2、RemoteoperatorstationTheRemoteOperatorStationisatypeapprovedpersonalcomputer,connectedtoacolourgraphicsdisplayandaprinte匸OperatorinputiseitherdonethroughastandardpersonalcomputerkeyboardorthroughourcustommadeOperatorControlPanel.TheOperatorControlPanelisaspeciallyde

3、signedkeyboardthatprovideseasyaccesstothedifferentoperatorfunctions.Itisdividedintoseparatefunctionareas.Buttonsarecombinedwithlampstoindicatealarms,statusoftheExtendedAlarmSystemandtoindicatemainsystemfunctions.TheOperatorControlPanelisinmanycasesconnectedtoanexter

4、nal"soundoffbutton.TheRemoteOperatorStationcanbesuppliedwithaprinter(forondemandprinting),analarmprinter,logprinterorcolourhardcopyunit.WhenaDistributedProcessUnitdetectsanalarmcondition,thealarmisidentifiedbyaflashingindicatorontheOperatorControlPanel.Thealarmisals

5、odisplayedonthecolourgraphicsdisplay,abuzzeristurnedonandtheAlarmPrinterautomaticallyprintsthealarm.Bypressingthebuttonassociatedwiththeflashingindicatormoredetailedalarminformationisdisplayedonthecolourgraphicsdisplay.DetailedsensorinformationforanyDistributedProce

6、ssUnit,suchasalarmornormalstatusdata,canalsobeshownonthecolourgraphicsdisplay,orprintedondemand・Analoguesensordatacanbepresentedasabargraphoratrendcurve・Selectedsensordatamaybeprintedautomaticallyatfixedintervals.Thesystemcandisplaythelatestalarmsforeachalarmgroupin

7、dividuallyorallactivealarms.Theloggingprinterandthecolourgraphicsdisplayrecordsallstatuschanges,suchasalarmacknowledgementsandalarmconditioncleared.Whenallalarmconditionsarecleared,thesystemreturnstonormal.AlarmlimitsanddelaysareadjustablefromtheOperatorControlPanel

8、.Acounterfunctionkeepstrackofrunninghoursforengines,pumpsandrelateditems.Thisfunctioncanalsoaccumulateflow・Countervaluesareshownonthecolou