Hello everybody,

I'm beginning with Step7 and SCL and I've got some problems.
I'm trying to read a record with the function SFB52.But that doesn't work. I think I made a mistake with the in/out var, because the data type is "ANY" and I don't really understant what is it and how it works.
When I try it, the error bit is set, and the status word is 16#C080B000.
I put you the code, could someone help me please?

FUNCTION_BLOCK FB_ReadReg

VAR_TEMP
// Temporary Variables
pAny : ANY;
END_VAR
VAR
// Static Variables
ControlWord : WORD;
END_VAR

pAny := ControlWord;

IF DB5.BUSY = false THEN
RDREC.DB5(REQ := 1
,ID := 16#10A // I/O Address of the module : 266dec.
,INDEX := 16#6040 // Control Word for Index = 6040hex.
,MLEN := 2 // Control Word length : 2 bytes
,RECORD := pAny
);
END_IF;
END_FUNCTION_BLOCK

So if I write :

ByteAddress := w#16#0600;

for DB6, Bit 0.0 , is it right?
Before I wrote that the variable is sored in a DB with : MemArea := b#16#19;
(I've read it in Step7 Help : "Format of the Parameter Type ANY")

Is it correct?

Regards.

I found that the address was good, because when I modify it in the code, I can see the address has changed in the symbol table.
But, it doesn't work better

It seems that the address I give is good, and I don't think the other parameters of the function are wrong...
Still a problem with the any structure?

I put the code again, I may have made a big mistake, that I don't see,of course

Thanks.

Code :

TYPE UDT_Any_Pointer
STRUCT
// Type Description
Syntax_ID : BYTE; //For S7, ID is 10h
DataType : BYTE;
RepeatFact : WORD;
DB_Number : WORD;
MemArea : WORD;
ByteAddress : WORD;

END_STRUCT
END_TYPE

FUNCTION_BLOCK FB_ReadRec

VAR_TEMP
// Temporary Variables
Buffer : UDT_Any_Pointer;
Temp_Any_Pointer AT Buffer : ANY;
Valid,Busy,Error : BOOL;
Status : DWORD;
Length : INT;
END_VAR
VAR
// Static Variables
ControlWord : WORD; //Address : DB1.DW0.0
END_VAR

Buffer.Syntax_ID := b#16#10;
Buffer.DataType := b#16#04; //Data is a word
Buffer.RepeatFact := 1;
Buffer.DB_Number := 0;
Buffer.MemArea := w#16#1900; //ControlWord is stored in a DB
Buffer.ByteAddress := w#16#0100; //DB1 , Bit 0.0

IF Busy = false THEN
RDREC.DB52(REQ := 1 // Request for reading
,ID := 16#10A // I/O Address for the module : 266dec
,INDEX := 16#6040 // ControlWord for Index = 6040hex
,MLEN := 2 // ControlWord's length : 2 bytes
,RECORD := Temp_Any_Pointer
);
Valid := DB52.VALID; // true if reading done
Busy := DB52.BUSY; // module is reading
Error := DB52.ERROR; // error while reading
Status := DB52.STATUS; // status for error
Length := DB52.LEN; // length of the value read
END_IF;

END_FUNCTION_BLOCK