How to use a variable (exp.variantPTR) able to contain pointers

Hi all,

I'm searching hard how to use a variable (exp.variantPTR)  able to contain pointers.

I have to use T_SEND but I need the DATA input to represent sometimes P#DB10.DBX0.0 BYTE 4, sometimes P#DB11.DBX0.0 BYTE 6, ... to be able to send different DataBlocks of different Types and Structures.

Here is my following example but it is INCORRECT, How to write it correctly?

IF #iSelect>1 THEN
// Statement section IF
     #variantPTR:=P#DB11.DBX0.0 BYTE 4;
END_IF;
IF #iSelect > 2 THEN
     #variantPTR:= P#DB22.DBX0.0 BYTE 6;
END_IF;

"TSEND_C_DB"(

   REQ:=false,
   CONT:=false,
   LEN:=0,
   DONE=>_bool_out_,
   BUSY=>_bool_out_,
   ERROR=>_bool_out_,
   STATUS=>_word_out_,
   CONNECT:=_variant_inout_,
   DATA:=#variantPTR,  // <== HERE I NEED A VARIABLE TO CONTAIN A VARIABLE POINTER
   ADDR:=_variant_inout_,
   COM_RST:=_bool_inout_

);

Thank you for help, I find no solution and deadline is close...

David

------------------------------------------------------------------------------------------
Split from Extended instruction handling Variant pointer in TIA V13 - S71500..

Hello David.

CASE iSelect OF
1: // -- FIRST SELECTION
  "TSEND_C_DB"
  (
    BUSY := #doTask,
    ^{_{...missing code}}
    DATA:=P#DB11.DBX0.0 BYTE 4,
    DONE := #taskDone,
    ^{...missing code}
  );
  IF #taskDone THEN
    doTask := FALSE;
    iSelect := 2;
  ELSE
    doTask := TRUE;
  END_IF;

2: // -- SECOND SELECTION
  "TSEND_C_DB"
  (
    BUSY := #doTask,
    _{^{...missing code}}
    DATA:=P#DB22.DBX0.0 BYTE 6,
    DONE := #taskDone,
    ^{...missing code}
  );
  IF #taskDone THEN
    doTask := FALSE;
    iSelect := 1;
  ELSE
    doTask := TRUE;
  END_IF;

ELSE //-- NO LEGAL TASK
  doTask := FALSE;
  iSelect := 1;

END_CASE;

Note that the complete instance DB is called at each case.

Bye.
 - Dan

Thank you very much for your quick answer, Dan,

I will apply it ASAP,

Thank you again,

David

David4444

Thank you very much for your quick answer, Dan,

I will apply it ASAP,

Thank you again,

David

David, there is a slip-up from my side. Do look into how you are handling the situation if an error is generated. Else you will have a system that "hangs" when it does not receive a "done" state.