S7-200的PLC按照寻址的范围有位寻址I0.0Q0.0M0.0S0.0SM0.0V0.0L0.0字节寻址IB0QB0MB0SMB0VB0LB0AC0字寻址IW0AIW0QW0AQW0VW0MW0LW0AC0双字寻址ID0AID0QD0AQD0VD0MD0LD0AC0S7-300的PLC按照寻址的范围有位寻址I0.0...

bool布尔量就是开关量只有0，1byte字节word字16位整数dword双字32位整数int带符号16位整数dint带符号32位整数real浮点数实数32位适配器就是plc和电脑的连接线例如MPI电缆　　以s7300为例：S7-300的数据类型分以下三种：基本数据类型、复合数据类型和参数类型。一、基本数据类型1、位...

1.比较类型数据比较指令主要包括等于、不等于、大于、小于、大于等于和小于等于等多种比较类型。这些比较类型可以根据实际需求进行选择，用于判断两个数据之间的关系。比较类型的选择需要根据具体的应用场景来确定，例如在温度控制系统中，可以使用大于和小于等比较类型来判断当前温度是否在设定范围内。数据比较指令的比较类型可以通过PLC...

文档解释ORA-26942:LCRshouldnotcontainoldvalueforcolumnstringintablestring.stringCause:TheLCRcontainedoldvaluesforLOB,XMLTypeandobjectcolumns.Action:Removeoldvaluesf...

文档解释ORA-26938:cannotpackLCRintoLCRbuffer(buffersizeisstring,LCRsizeisstring)Cause:Thelogicalchangerecord(LCR)bufferwasnotlargeenoughtostorethecurrentLCR.Action:...

文档解释ORA-09716:kslcll:Unabletofixin-fluxlamportlatch.Cause:OneOracleprocessdiedwhilestillholdingalamportlatch.Action:Exit(kill)allOracleuserprocesses.Shutdown(ab...

文档解释ORA-07212:slcpu:timeserror,unabletogetcputime.Cause:timessystemcallreturnedanerror.PossibleOSerror.Action:Checkadditionalinformationreturned.Contactcustomer...

文档解释ORA-07270:spalck:setitimererror,unabletosetintervaltimer.Cause:Anerroroccurredwhiletryingtosetanintervaltimer.Probableportingproblem.Action:Checkerrno.ORA-0...

文档解释ORA-07210:slcpu:getrusageerror,unabletogetcputime.Cause:Getrusagesystemcallreturnedanerror.PossibleOSerror.Action:Checkadditionalinformationreturned.Contact...

文档解释ORA-26893:InputLCRmustbeacommitLCRCause:TheinputLCRwasnotacommitLCR.Action:MakesuretheinputLCRisacommitLCR.ORA-26893：LCR必须是提交LCR官方解释错误消息ORA-26893表明提供程序的输入参数...

文档解释ORA-26915:UnabletoreturnLogicalChangeRecord(LCR)informationduetomissingdatadictionary.Cause:Thecurrentsessionwasunabletoreturntherequestedinformationonthegi...

文档解释ORA-26679:operationnotallowedonLOBorLONGcolumnsinLCRCause:CertainoperationsonLOB/LONGcolumnsoftheLCRthroughrule-basedtransformations,DMLhandlers,orerrorhand...

文档解释ORA-26688:missingkeyinLCRCause:Metadatamismatch,ornotenoughinformationintheusergeneratedLCR.Action:Alterthedatabaseobject,orprovidealldefinedkeysintheLCR.OR...

文档解释ORA-26904:Invalidbindvariable“string”inLCRfieldexpression.Cause:Inthestatementhandler,thebindvariableslistedintheSQLexpressiondidnotmatchtheallo...

文档解释ORA-26873:cannotcallstringwhileOCIXStreamOutLCRCallbackReceivecallisstillexecuting.Cause:AnattemptwasmadetoinvokethespecifiedcallwhileOCIXStreamOutLCRCallba...