RS232接口通讯协议.doc

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1、SENTRYRS232COMMUNICATIONPROTOCOLIndexGeneralTEXTMODEcommunicationBINARYMODEcommunicationTEXTMODEupstransmittedmessagesBINARYMODEupstransmittedmessageEasiestwaytomonitoringUPSstatusHowtogetUPSshut-down5charscommandssequenceGeneralThecommunicationwithSentryHPS/RPSuseRS232seriallinec

2、onnectionwith:-only3wiresTX,RXandGND;-8bits;-Noparity;-Baudrate=9600,selectabledownto1200ontheups.Therearetwowaystocommunicate;TEXTmodeandBINARYmode.Holdingon“0”theECHOfunction.Assetinfactory,theSentryrespondsonlyafterreceivingacommandchartransmittedformcomputer.IftheECHOisseton“1

3、”whencustomizingsomeoperatingvalues,theSentrytransmitscharswithoutreceivinganycommandcharfromthecomputer..WithECHO=1,eachtimethatthatthealarmconditionchanges,theSentrytransmitsthe“TEXTMESSAGE9”withoutreceivinganycommand.TEXTMODEcommunicationTheTEXTMODEcommunicationisopenedwhencomp

4、utertransmitsasequenceoftwoASCIIcharacters.Thefirstmustbe‘9’thesecondmustbe‘0’andinmustbeintothetimeintervalof0.5–2sec.afterthefirst.Thesecondcharis‘0’onlyidthecustomizingvalue“INDENT”isequalto‘0’,asdefault,otherwiseitmustbeequaltothenewvalueofIDENT.TheIDENTvaluecanbesetfrom0to7to

5、obtainthecommunicationwith8differentmachinesconnectedtothesameRE232serialline.AfteropeningTEXTMODEcommunicationthecomputecansendtheASCIIcharsform‘1’to‘9’tohavebackthe“TEXTMESSAGES9”andalsotoexecuteacommandonthemachineinthesameofpushingthebuttonspanelnumberedform1to8.Sendingthechar

6、’9’,aftertheopeningsequence,itispossibletoobtainbackthe“TEXTMESSAGE9”withoutexecuteanycommandonthemachine,sendingtheASCIIchar‘:’itispossibletoreceivethe“TEXTMESSAGE:”.ThecommunicationisCLOSEDwhensendinganychardifferentform‘1’to‘9’or‘:’andformthreespecial(BINARYCHSR)forreceivingthe

7、BINARYMESSAGE.BINARYMODEcommunicationTheBINARYMESSAGEisobtainedeachtimethecomputertransmitsonlyonecharwithvalue192or204or224decimaliftheIDENTis0,otherwisethecharvalueis=(192or204or224decimal)+theIDENTvalue,.Thechar192selectstheBINARYMESSAGErelativetoalloperatingsevaluesanthevalues

8、ofmeasuresreferredtothePRESENTEVE