MUX4

Function - Select one of the inputs - 4 inputs.

Inputs

SELECT : DINT Selection command
IN1    : ANY First input
IN2    : ANY Second input
...    :
IN4    : ANY Last input

Outputs

Q : ANY IN1 or IN2 ... or IN4 depending on SELECT (see truth table)

Truth table

SELECT	Q
0	IN1
1	IN2
2	IN3
3	IN4
other	0

Remarks

In LD language, the input rung (EN) enables the selection. The output rung keeps the same state as the input rung. In IL language, the first parameter (selector) must be loaded in the current result before calling the function. Other inputs are operands of the function, separated by comas.

ST Language

Q := MUX4 (SELECT, IN1, IN2, IN3, IN4);

FBD Language

Mux4Fbd.gif (1560 octets)

LD Language

(* the selection is performed only if EN is TRUE *)
(* ENO has the same value as EN *)
Mux4Ld.gif (1834 octets)

IL Language

Op1: LD   SELECT
     MUX4 IN1, IN2, IN3, IN4
     ST   Q