How can I create a global variable compatible with Octetstring[4], Octetstring[5], so that I can call it main in my code

Cheers
DivisionByZero
Reference:
Supported port data types - ports with octet string There are several possibilities of combining the different data types of ports and I/O systems. Unsigned FDCML data types and variables (e.g. octet string) can be interconnected with the similar data types of different programming languages as shown in the table below.
Any solution, no, how could I put two bytes in a word?
BYTE0 — Distance_to_Object_in_mm_WORD.B0
BYTE1 — Distance_to_Object_in_mm_WORD.B1
Reference:
Partial Access to ANY_BIT Variables ');\n mywindow.document.close(); \n mywindow.focus();\n setTimeout(function () {\n mywindow.print();\n mywindow.close();\n }, 1000)\n return true;\n}\r\n\r\n\r\n