Short summary

Name	`MUX_DWORD`
→POU type	→function
Category	IEC-block, Select, block with internal error diagnostic
Conform to →IEC-standard	more possible than defined in IEC-standard (IEC demands `ANY_ELEMENTARY` for the inputs and the return value.) but also: currently restricted (IEC demands data type `ANY_ELEMENTARY` for the inputs, hence the following data types are demanded as well: `LTIME`, `WSTRING`, `WCHAR`, `LDATE_AND_TIME`, `LTIME_OF_DAY` and `LDATE`. Currently, these data types are not supported for the block.)
Graphical interface
Available since	version 1.22.0 (for logi.CAD 3) – initial variant version 1.109.0 (for logi.CAD 3) – enhancement: `STRING` and `CHAR` for `IN0`, `IN1` ... `IN15` and for the return value version 3.0.1 (for library `Standard`) – enhancement: user-defined data types and references for `IN0`, `IN1` ... `IN15` and for the return value

Functionality

Depending on the input K, the block selects one of the values connected at the other inputs.

If value 0 is connected at input K, the block returns the value connected at input IN0. Value 1 for input K has the block return the value connected at input IN1, value 2 has the value of input IN2 returned etc.

Inputs, return value

	Identifier	→Data type	Description
Inputs:	`K`	`DWORD`	selector
	`IN0`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT`, `LINT`, `TIME`, `BOOL`, `BYTE`, `WORD`, `DWORD`, `LWORD`, `STRING`, `CHAR`, `DATE_AND_TIME`, `DATE`, `TIME_OF_DAY`, a →user-defined data type or a →reference Restriction: In case of →array data types, only one-dimensional arrays are allowed.	1st value
	`IN1`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT`, `LINT`, `TIME`, `BOOL`, `BYTE`, `WORD`, `DWORD`, `LWORD`, `STRING`, `CHAR`, `DATE_AND_TIME`, `DATE`, `TIME_OF_DAY`, a →user-defined data type or a →reference Restriction: In case of →array data types, only one-dimensional arrays are allowed.	2nd value
	... (extensible until)
	`IN15`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT`, `LINT`, `TIME`, `BOOL`, `BYTE`, `WORD`, `DWORD`, `LWORD`, `STRING`, `CHAR`, `DATE_AND_TIME`, `DATE`, `TIME_OF_DAY`, a →user-defined data type or a →reference Restriction: In case of →array data types, only one-dimensional arrays are allowed.	16th value
Return value:	–	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT`, `LINT`, `TIME`, `BOOL`, `BYTE`, `WORD`, `DWORD`, `LWORD`, `STRING`, `CHAR`, `DATE_AND_TIME`, `DATE`, `TIME_OF_DAY`, a →user-defined data type or a →reference Restriction: In case of →array data types, only one-dimensional arrays are allowed.

Input EN and output ENO are available when →calling the block. See "Execution control: EN, ENO" for information on input EN and output ENO.

See:

"Blocks for safe logic" whether this block is supported for developing safety-relevant applications.
"Highlighting safe logic in the FBD-editor" for the effects when using the block as a block for safe logic .

Internal error diagnostic for block

The block checks the value connected to inpu t K before it is executed.
If the value for K is > the highest connected input, the output ENO of the block is set to value FALSE (or an equivalent) and the block returns the value 0.

Example for usage within ST-editor

PROGRAM Test
	VAR
		result1, result2, result3, result4 : DWORD;
		stateENO1 : BOOL;
	END_VAR
	result1 := MUX_DWORD(K := 16#0000_0002, IN0 := 16#0000_0001, IN1 := 16#0000_0002, IN2 := 16#0000_0003, IN3 := 16#0000_0004, IN4 := 16#0000_0005);       (* The variable 'result1' evaluates to '16#0000_0003'. *)
	result2 := MUX_DWORD(K := 16#0000_0004, IN0 := 16#0000_0001, IN1 := 16#0000_0002, IN2 := 16#0000_0003, IN3 := 16#0000_0004, IN4 := 16#0000_0005);       (* The variable 'result2' evaluates to '16#0000_0005'.  *)
	result3 := MUX_DWORD(K := 16#0000_0000, IN0 := 16#0000_0001, IN1 := 16#0000_0002, IN2 := 16#0000_0003, IN3 := 16#0000_0004, IN4 := 16#0000_0005);       (* The variable 'result3' evaluates to '16#0000_0001'.  *)
	result4 := MUX_DWORD(K := 16#0000_0007, IN0 := 16#0000_0001, IN1 := 16#0000_0002, IN2 := 16#0000_0003, IN3 := 16#0000_0004, IN4 := 16#0000_0005, ENO => stateENO1);      (* The variable 'result4' evaluates to '0', 'stateENO1' to 'FALSE'. *)
END_PROGRAM

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