BYTE_TO_WORD

The BYTE_TO_WORD block converts a BYTE value to WORD.

Ladder representation

Variable Type	Name	Data Type	Description
VAR_INPUT	EN	BOOL	Block enable.
VAR_INPUT	Value	BYTE / USINT / SINT	BYTE value.
VAR_OUTPUT	ENO	BOOL	End of operation.
VAR_OUTPUT	Result	WORD / UINT / INT	WORD value.

When EN is TRUE, the block interprets Value as a BYTE value, converts it to WORD, and stores the result in Result.

When EN is FALSE, Result remains unchanged.

The ENO output passes the EN state to the next Ladder block after the operation is finished.

BYTE_TO_WORD execution flowchart

The Ladder examples convert VALUE from BYTE to WORD, store the final value in RESULT, and activate ENO when the block finishes successfully.

BYTE_TO_WORD Ladder example

BYTE_TO_WORD Ladder example result

The following Structured Text code applies the same logic shown in the Ladder example.

Structured Text
VAR
    VALUE : SINT := 120;
    RESULT : INT;
END_VAR

RESULT := FB_BYTE_TO_WORD(EN:=DI1, Value:=VALUE, ENO=>DO1);