‘Extras’ ‘Negate’ in LD

Symbol: Shortcut: <Ctrl>+<N>

Use this command to negate a contact, a coil, a jump or return instruction, or an input or output of EN POUs at the present Cursor Positions in the LD Editors.

Between the parentheses of the Coil or between the straight lines of the Contact, a slash will appear ((/) or |/|). If there are jumps, returns, or inputs or outputs of EN POUs, a small circle will appear at the connection, just as in the FBD editor.

The coil now writes the negated value of the input connection in the respective Boolean variable. Right at this moment, a negated contact switches the status of the input to the output, if the respective Boolean variable carries the value FALSE.

If a jump or a return is marked, then the input of this jump or return will be negated.

A negation can be canceled through renewed negation.