Save Variable Values to PDMM SD memory | 08 Apr 2015 | |

Save Variable Values to PDMM SD memory

The attached sample .kas project contains a program (SaveVarsToSDcard) that stores application variables in a .csv file on the PDMM SD card:

//Load variable names (VAR1,VAR2,VAR3, and VAR4) from file on development PC
ON FileConnect DO
ID_LogFile := VLID ('c:\MyFileTest.txt');
END_DO;

//Store variable values to a csv file on the PDMM SD card
rStart(Execute);

IF Done AND NOT Execute THEN
Done := FALSE;
END_IF;

IF rStart.Q OR Active THEN

   CASE iStepCounter OF

   0:
      Active := TRUE;
      iStepCounter := 1;

   1:
      SD_MOUNT();

      IF SD_ISREADY() THEN
         iStepCounter := 2;
      END_IF;

   2:
      ID := F_WOPEN('//SDCard/file2');
      iStepCounter := 3;

   3:
      MyLog (1, RST, ID_LogFile, '//SDCard/file1');
      IF MyLOG.Q THEN
         Q := MyLOG.Q;
         ERR := MyLog.ERR;
         MyLog (0, RST, ID_LogFile, '//SDCard/file1');
         iStepCounter := 4;
      END_IF;
      ERR := MyLog.ERR;

   4:
      F_CLOSE(ID);
      iStepCounter := 98;

   98:
      SD_UNMOUNT();
      iStepCounter := 99;

   99:
      Done := TRUE;
      Active := FALSE;