SEL_CHAR block

Short summary

Name	`SEL_CHAR`
→POU type	→function
Category	IEC-block, Select
Conform to →IEC-standard	no restrictions
Graphical interface
Available since	version 1.109.0 (for Neuron Power Engineer) – initial variant version 2.0.4 (for library `Standard`) – changed location (from sub-library `SelectEnh` to `Select`)

Functionality

The block makes a binary selection – analogous to the SEL block. In contrast to that block, SEL_CHAR allows the connection with CHAR only (for IN0 and IN1).

Inputs, return value

	Identifier	→Data type	Description
Inputs:	`G`	`BOOL`	selector
	`IN1`	`CHAR`	1st value
	`IN2`	`CHAR`	2nd value
Return value:	–	`CHAR`

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 : CHAR;

        result2 : CHAR;

    END_VAR

    result1 := SEL_CHAR(G := FALSE, IN0 := 'A', IN1 := 'B');   (* The variable 'result1' evaluates to ''A''. *)

    result2 := SEL_CHAR(G := TRUE, IN0 := 'A', IN1 := 'B');    (* The variable 'result2' evaluates to ''B''. *)

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.