Global variabel

robotverkl

I have declared a couple of global variables in my main program and can access these values from another module which I load with the load command. However I cannot set these variables from the loaded module. How do I do that? I have the following code:

Module mod1
PERS bool red := FALSE;
PERS bool black := FALSE;
PERS bool green := FALSE;
PROC main()
LOAD "C:/folder/file.prg";
%"paintprg:callMe"%;
UNLOAD "C:/folder/file.prg";
ENDPROC
ENDMODULE

MODULE mod2
PROC callMe()
red := TRUE;         ! This doesn't work
ENDPROC
ENDMODULE

Why won't that work and how should I do to solve it?

 

claudio

Hi

I recommend you to use .MOD files for your modules.
In your example, file.prg should be Mod2.mod

I usually use a module containing only the PERS variables, such as:

MODULE Globals
  PERS bool red := FALSE;
  PERS bool black := FALSE;
  PERS bool green := FALSE;
ENDMODULE

Then a small module that loads the most of the code, such as:

MODULE StdTask
  PROC Main()
    LOAD "C:/folder/modmain.mod";
   red:=FALSE;
    TPWrite "Now red is FALSE";
    %"MainEntry"%;
    IF red THEN
      TPWrite "Now red is TRUE";
    ENDIF
  ENDPROC
ENDMODULE

And the main module

MODULE ModMain
  PROC MainEntry()
    red := TRUE;         & nbsp;       ! This will work
    Save "GLOBALS.MOD";    ! Not recommended, but legal
  ENDPROC
ENDMODULE

Saving Globals.mod will save new PERS values in the file, that can help if you P-Start the controller very often.  But do not write to often on the flash-disk or you can damage it (so I've been told, even if it has never happend to me).

claudio2007-3-29 9:27:29

kschmid

Can I load a module without an absolute path? Does it understand relative paths or environment variables?

Actually full path gives me

System1/RAPID/T_ROB1/Module1(280,14): String too long(141): The string LOAD is too long.    12/07/2019 2:51:29 PM    General   

lemster68

I believe that the real problem lies in the parentheses.

k_schmid

Would you recommend adding parentheses?

kschmid

I am using windows syntax with backslashes (path has spaces as well) ... Not sure it matters?

 RemoveDirWithContent("HOME:/Test");

Where does HOME point to or how do i set  HOME ?

This is interpreted as the path to the home directory of the current system.

kschmid

Ah, folder below your system (in controller tab) ...

Loading more than once is bad, can I check loaded?

lemster68

Yes, use ModExist.