Short summary

Name	`SIGN`
→POU type	→function
Category	IEC-block, NumericEnh
Conform to →IEC-standard	not defined in IEC-standard
Graphical interface
Available since	version 1.27.0 (for logi.CAD 3)

Functionality

The block returns information about the sign of the value that is connected to the input IN:

Value connected to `IN`	Return value
< `0`	`-1`
`0`	`0`
> `0`	`1`

Inputs, return value

	Identifier	→Data type	Description
Inputs:	`IN`	`REAL`, `LREAL`, `USINT`, `UINT`, `UDINT`, `ULINT`, `SINT`, `INT`, `DINT` or `LINT` (corresponds to →generic data type `ANY_NUM`)	value
Return value:	–	`SINT`

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, result2, result3 : SINT;
   END_VAR
   result1 := SIGN(INT#-5);    (* The variable 'result1' evaluates to '-1'. *)
   result2 := SIGN(INT#0);     (* The variable 'result2' evaluates to '0'. *)
   result3 := SIGN(INT#5);     (* The variable 'result3' evaluates to '1'. *)
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.