LDN

Load NOT

The accumulator is loaded with the negated operand defined in the operand field.

Remarks

  • Valid operands for this operator must be of one of the following data types:   (BOOL)

  • 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.
Related topics:

LD

System instructions

Instructions pane

Memory areas

Data types

Parent topic: IL editor operators

Example

POU header

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

IL body

LDN

var_1

(* Load inverted var_1 in accu *)

ST

var_3

(* Store accu in var_3 *)

LDN

var_2

(* Load inverted var_2 in accu *)

ST

var_1

(* Store accu in var_1 *)

LD

var_3

(* Load var_3 in accu *)

ST

var_2

(* Store accu in var_2 *)

Modified on: 2019-01-25Feedback on this pagePanasonic hotline