Introduction

Links are connections between LD objects (contacts, coils, FFBs etc).

There are two types of links:

  • Boolean links

    Boolean links comprise one or more segments that connect Boolean objects (contacts, coils) with one another.

    With Boolean links there are:

    • Horizontal connections

      Horizontal connections enable series switching of contacts and coils.

      The segments of this link can be created individually or as a complex link comprising several segments.

    • Vertical connections

      Vertical connections enable parallel switching of contacts and coils.

  • FFB links

    FFB links are a combination of horizontal and vertical segments that connect FFB inputs/outputs with other objects.

    To avoid links crossing each other, FFB links can also be represented in the form of connectors.

FFB links are represented with double line thickness to distinguish them from Boolean links.

NOTE: A detailed description about links, see also section Links in the Reference manual.

Selecting links

Selecting links:

Type of connection

Call via menu command

Call via symbol

Call via key

Cursor symbol

Horizontal connection

Objects > Boolean Connection

or

Edit > New > Boolean Connection

or

Connection > Boolean Connection from the shortcut menu

F7

Link tool mode (horizontal connection)

Objects > Boolean Link

or

Edit > New > Boolean Link

Alt + F6

Vertical connection

Objects > Vertical Connection

or

Edit > New > Vertical Connection

or

Link > Vertical connexion from the shortcut menu

Shift + F7

FFB link

Objects > Link

or

Edit > New > Link

F6

,

Derivation

–

–