MUX

MUX is a multiplexer block. It concatenates 16 BOOL input variables into one WORD output value.

Ladder Representation

Variable Table

Variable Type	Name	Data Type	Description
VAR_INPUT	EN	BOOL	Enables block execution.
VAR_INPUT	Bit0–Bit15	BOOL	Bit value for the corresponding position in the new word.
VAR_OUTPUT	ENO	BOOL	Indicates the end of the operation.
VAR_OUTPUT	Word	WORD UINT INT	New word formed from the input bits.

Operation

When EN is TRUE, MUX concatenates the Boolean input values and stores the result in Word.

Bit0 corresponds to the least significant bit (LSB). Bit15 corresponds to the most significant bit (MSB).

When EN is FALSE, Word remains unchanged.

ENO passes the EN value to the next Ladder block after the operation finishes.

Execution Flowchart

Examples

Ladder Example

The example concatenates the Boolean input bits into the output word stored in MYWORD. The block finishes successfully and activates ENO.

Structured Text Example

The following Structured Text example applies the same multiplexing logic.

Structured Text

VAR
    MYWORD : WORD;
END_VAR

MYWORD := FB_MUX(
    EN:=DI1,
    Bit0:=DI2,
    Bit1:=DI3,
    Bit2:=DI2,
    Bit3:=DI2,
    Bit4:=DI2,
    Bit5:=DI2,
    Bit6:=DI3,
    Bit7:=DI3,
    Bit8:=DI3,
    Bit9:=DI2,
    Bit10:=DI3,
    Bit11:=DI2,
    Bit12:=DI3,
    Bit13:=DI3,
    Bit14:=DI3,
    Bit15:=DI2,
    ENO=>DO1);