F_iecCopyStreamToStream

FUNCTION F_iecCopyStreamToStream: UDINT

VAR_INPUT
    cbCopy      : UDINT;
END_VAR
VAR_IN_OUT
    target      : ST_IEC870_5_101Stream;
    source      : ST_IEC870_5_101Stream;
END_VAR

cbCopy: Number of bytes to be copied from the source variable to the target variable.

target: Target data buffer

source: Source data buffer

Example in ST:

At a rising edge at  bCopy first the srcValue  is incremented and copied to srcStream . After that the first 4 data bytes are copied from srcStream to dstStream. At the end  the first 4 data bytes are copied from dstStream into the dstValue variable.

PROGRAM P_iecCopyStreamToStream
VAR
    srcStream       : ST_IEC870_5_101Stream;
    srcValue    : DWORD;

    dstStream       : ST_IEC870_5_101Stream;
    dstValue    : DWORD;

    bCopy       : BOOL;
END_VAR

IF bCopy THEN
    bCopy := FALSE;
    srcValue := srcValue + 1;
    
    F_iecCopyBufferToStream( ADR( srcValue ), SIZEOF( srcValue ), srcStream );

    F_iecCopyStreamToStream( SIZEOF( srcValue ), dstStream, srcStream );

    F_iecCopyStreamToBuffer( ADR( dstValue ), SIZEOF( dstValue ), dstStream );

END_IF

Memory description of srcStream and dstStream variable after the first F_iecCopyStreamToStream function call:

Memory description of srcStream and dstStream variable after thesecond F_iecCopyStreamToStream function call:

Requirements