Struct to Byte

Hello

I have a struct fx:
TYPE
stTest :
STRUCT
BoolTest : bool;
ByteTest : byte;
IntTest : int;

END_STRUCT;
END_TYPE

I want to trasfer it over Profinet IO (ILC131) to a Siemens Master.
I Found the function MEMCPY, and in the Help file it says; "For this type of data management it is recommended to use the data types STRUCT and ARRAY"
But i can't connect the stTest Struct to the FB?

I'm a little lost now...


- Emil