Condition for using the LD-editor

You have already installed the required license.

Representation of ladder diagram

The ladder diagram is displayed as graphical elements in the appropriate LD-editor:

Open the graphical LD-editor as follows: Double-click an already created LD-object . Alternative: Open the context menu for the LD-object and select Open With – LD-Editor.
See "Components for LD-editor" and "Logic elements of ladder diagram " for more information on the content.

Specific actions/elements within LD-editor

• Creating POU in LD

• Important features of LD-editor

  • Content assist in the LD-editor

  • Highlighting the errors and warnings in the LD-editor

  • Auto layouting for LD-editor

  • Automatic routing of lines in LD-editor

• Reserved keywords in LD

• Supported data types (in LD)

• Evaluation of rungs in LD

• Actions within LD-editor

  • Creating the ladder diagram

    • Declaring variables in LD and assigning a variable to contact/coil

    • Creating elements in a rung (with new link element or an And/Or link)

    • Entering an expression for an input/output for a function or function block

    • Assigning an existing variable to a contact or coil

    • Reconnect existing link elements

    • Saving ladder diagram

    • Closing LD-editor

  • Modifying variables (LD)

  • Modifying the ladder diagram

    • Changing the name of POU in LD

    • Showing or hiding EN and ENO within the LD-editor

    • Create more rungs

    • Entering or editing the title or description of a rung

    • Entering/editing the description/tag of a contact or a coil

    • Undoing or redoing changes in LD-editor

    • Selecting multiple logic elements

    • Moving logic elements

    • Deleting logic elements

    • Resizing logic elements

  • Namespaces in LD

  • Changing position or view in LD-editor

    • Moving and scrolling within the LD-editor

    • Zooming in or out (in the LD-editor)

• Logic elements of ladder diagram

  • Rung in LD-editor

  • Power rails

  • Link elements (lines) and their states in LD

  • Functions and function blocks in LD

  • Contacts in LD

  • Coils in LD

  • OLT-fields in LD

• Components for LD-editor

  • Drawing field for LD-editor

  • Palette for LD-editor

  • List of the declared variables (LD)

  • Statusbar for LD-editor