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Jul 31, 2023 1:40 pm
Hello, I have variable code:
FOR n:=1 TO 255 DO CONCAT2(pSrcString1:=ADR(GlobalPersistent.ReadAllEvents[n].sDate),pSrcString2:=ADR(GlobalPersistent.ReadAllEvents[n].STime),pDstString:=ADR(GVariable.WriteToFileString[n]),nDstSize:=255); formatStrg:='%s,%s,%s,%s'; FBFormatString(sFormat:=FormatStrg, arg1:=F_STRING(GlobalPersistent.ReadAllEvents[n].sDate), arg2:=F_STRING(GlobalPersistent.ReadAllEvents[n].STime), arg3:=F_STRING(GlobalPersistent.ReadAllEvents[n].sSource), arg4:=F_STRING(GlobalPersistent.ReadAllEvents[n].sMessageText), sOut=>GVariable.WriteToFileString[n]); END_FOR
I string write to array, when this Array I write to txt file
fbFileWrite( bExecute := FALSE ); fbFileWrite( sNetId:=sDestNetId, hFile:=hDestFile, pWriteBuff:= ADR(GVariable.WriteToFileString), cbWriteLen:= SIZEOF(GVariable.WriteToFileString), bExecute:=TRUE, tTimeout:=tTimeOut );
I open create file and see this
how solve problem don't show a lot of NULL
1 Reply
Aug 01, 2023 8:56 am
I would guess the problem is how you are executing fbFileWrite. If this is cyclical ST code, you shouldn't execute the function block twice in the same scan. Your code is continually toggling the bExecute bit which could explain the result you're seeing. A common practice is to monitor the bBusy bit after executing fbFileWrite with bExecute:=true. It isn't necessary to turn off bExecute until the busy bit goes false.