BIT_CLR block

Short summary

Name	`BIT_CLR`
→POU type	→function
Category	IEC-block, BitstringEnh
Conform to →IEC-standard	not defined in IEC-standard
Graphical interface
Available since	version 1.20.0 (for Neuron Power Engineer) – initial variant: `ANY_BIT` for input `IN` and return value version 1.35.0 (for Neuron Power Engineer) – enhancement: `ANY_INT` for input `IN` and return value

Functionality

The block returns the result of a bitwise deletion.

At input IN, enter a value (the value at input IN is unchanged when the deletion takes place). At input N, enter the bit number (0-based) that should be cleared.

Inputs, return value

	Identifier	→Data type	Description
Inputs:	`IN`	`BOOL`, `BYTE`, `WORD`, `DWORD` or `LWORD` (corresponds to →generic data type `ANY_BIT`) and `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_INT`)	input value
Inputs:	`N`	`USINT`	the bit number (0-based) to clear
Return value:	–	`BOOL`, `BYTE`, `WORD`, `DWORD` or `LWORD` (corresponds to →generic data type `ANY_BIT`) and `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_INT`)

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.

Example for usage within ST-editor

PROGRAM Test

VAR

        result1 : WORD;

        result2 : LWORD;

    END_VAR

    result1 := BIT_CLR(IN := WORD#16#8003, N := 15);               (* The variable 'result1' evaluates to 'WORD#16#0003'. *)

    result2 := BIT_CLR(IN := LWORD#16#0000000000000003, N := 2);   (* The variable 'result2' evaluates to 'LWORD#16#0000000000000003'. *)

END_PROGRAM

When creating your application within the ST-editor, enter a call of a block by typing the text as requested by the syntax or use Content Assist.