STN

Store NOT

The content of the accumulator is transferred negated to the operand defined in the operand field.

Valid operands for this operator must be of one of the following data types:BOOL.

NOTE

Operator only available in IL programming language.
var_1, var_2 and var_3 must be of data type BOOL.
This code example simply exchanges the inverted values of var_1 and var_2 with the help of an additional variable var_3.

Example

POU header

In the POU header, all input and output variables are declared that are used for programming this function.

IL body The values of var_1, var_2 and var_3 are exchanged. var_1, var_2 and var_3 can be of any valid data type. However, all three operands must be of the same data type.

LD	var_1	(* Load var_1 in accu *)
ST	var_3	(* Store accu in var_3 *)
LD	var_2	(* Load var_2 in accu *)
STN	var_1	(* Store inverted accu in var_1 *)
LD	var_3	(* Load var_3 in accu *)
STN	var_2	(* Store inverted accu in var_2 *)