Retain variables from File, cmpApp

Engineering 🇬🇧
alex87
2014-11-28
2014-11-28

  • alex87 - 2014-11-28

    Hello,

    I'm trying to implement retrieving Retain variables from File, using lib cmpApp. I found a sample in Codesys Store:
    http://store.codesys.com/application-manager.html

    So I copied PRG into my project added lib and retain variable, And I get an error that RTS_IEC_RESULT is unknown type, but is declared like:

    PROGRAM AppRetain
VAR
   fbDelete            : FILE.Delete; (* Function block to delete the file *)
    (* The retain file <application-name>.ret is placed in the directory of the bootproject *)
   sFileName          : STRING := 'App1.ret';
   pApp         : POINTER TO APPLICATION;
   Result                : RTS_IEC_RESULT; (* Result code *)
   xInit         : BOOL;
END_VAR

    Code:

    (* The retain variables are stores in a file and get retrieved afterwards. *)
IF NOT xInit THEN
   
   (* First delete the retain file.
      This is necessary, because the function AppStoreRetainsInFile appends the data at the end of the file. *)
   fbDelete(xExecute:=TRUE, sFileName:=sFileName);
   IF fbDelete.xDone OR (fbDelete.xError AND fbDelete.eError = FILE.ERROR.NOT_EXIST) THEN
      (* Attention: It takes at least one cycle until xDone is TRUE *)
      fbDelete(xExecute:=FALSE);
      xInit := TRUE;
      (* Now, it's the time to save the retains. *)
      pApp := AppGetCurrent(pResult:=ADR(Result));
      IF pApp <> 0 THEN
         (* Store the variables in a file*)
         Result := AppStoreRetainsInFile(pApp,sFileName);
      END_IF
   END_IF
END_IF
(* Restore the Retain Variables from the file.
   For storing and restoring, the same pointer to application (pApp) must be used.*)
Result := AppRestoreRetainsFromFile(pApp, sFileName);

    I have no Idea how to declare it other way??? Any Ideas?

    regards,
    Alex

    IMG: RTS_IEC_RESULT.png

     

  • TimvH

    TimvH - 2014-11-28

    With newer library versions it is required (and also better for older versions) to use the namespace to define which RTS_IEC_RESULT you want to use.

    In this case you need to define the variable as:
    Result : CmpApp.RTS_IEC_RESULT;

     

  • alex87 - 2014-11-28

    Thank you TimvH didn't know that, Build OK, now testing.

    regards,
    Alex

     

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