Hello knezamo,

1. Create UDT DT_ANY pic 1.

• wDataType : WORD;
• wByteNo : WORD;
• wDB_No : WORD;
• dwAddress : DWORD;

2. Create dbAny Data Block pic 2.

• pSource : DT_ANY;
• pDestination : DT_ANY;

3. Create 1 destination data block and at least two source Data blocks. Pics 3.,4.,5.,6.
In this example they are all the same but they don't have to be.
4.Create FC2 as it is shown on pic 7.
5. Inside OB1 call FC2 pic 8.
6. Regardless of pSource and pDestination Values your function FC copy one DB to the another.
7. Carefully enter values inside pSource and pDestination otherwise....

FC2 Pic. 9;

// Fill Source Any
L     P##pSource
LAR1
// Fill Data Type
L     #Source.wDataType
T LW [ AR1 , P#0.0 ]
//-----------------------------
// Fill Number of bytes
L     #Source.wByteNo
T LW [ AR1 , P#2.0 ]
//-----------------------------
// Fill DB Number
L     #Source.wDB_No
T LW [ AR1 , P#4.0 ]
//-----------------------------
// Fill DB Starting point
L     #Source.dwAddress
T LD [ AR1 , P#6.0 ]
//-----------------------------

// Fill Destination Any
L     P##pDestination
LAR1
// Fill Data Type
L     #Destination.wDataType
T LW [ AR1 , P#0.0 ]
//-----------------------------
// Fill Number of bytes
L     #Destination.wByteNo
T LW [ AR1 , P#2.0 ]
//-----------------------------
// Fill DB Number
L     #Destination.wDB_No
T LW [ AR1 , P#4.0 ]
//-----------------------------
// Fill DB Starting point
L     #Destination.dwAddress
T LD [ AR1 , P#6.0 ]
//-----------------------------

CALL  BLKMOV
blk_type:=Variant
SRCBLK  :=#pSource
RET_VAL :=#iRET
DSTBLK  :=#pDestination

This program is fully made by following next example YT Link , just with minor expansion allowing entering input parameters from "outside".
In order to understand entering source and destination DB from "Outside" you need to know this:

Format of the Parameter Type POINTER

Be aware you can realize this even easier inside SCL using VARIANT Data type. Using VARIANT instead of "DT_ANY" Source and Destination  input Tags. Handling Tags inside SCL especially with Variant data type is a lot more easier than in STL. Take a look example over there

VARIANT POINTER

Best Regards Soble

There is project example in v15.1 sp3

Best Regards Soble