Ladder Diagrams are graphical programs that are similar to 'relay ladder' programs. Traditionally, 'relay ladder' programs have been used to program PLCs and similar devices. They are ideally suited to programs that provide complicated AND and OR logic.
If you are familiar with 'relay ladder' programs, you will soon become accustomed to working with Ladder Diagrams as they use similar symbols and features.
The following sections explain the concepts and features of Ladder Diagrams:
- How Ladder Diagrams Work
- Ladder Diagram Components
- Create a Ladder Diagram Database Item
- Edit a Ladder Diagram
- Ladder Diagram Display
- Add Variables to a Ladder Diagram
- Add Processed Historic Values to Ladder Diagrams
- Add a Constant Value to a Ladder Diagram
- Add a Function to a Ladder Diagram
- Add a Function Block to a Ladder Diagram
- Add a Conversion to a Ladder Diagram
- Add a Comment to a Ladder Diagram
- Controlling the Flow of a Ladder Diagram
- Edit a Variable on a Ladder Diagram
- Rename a Variable on a Ladder Diagram
- Delete a Variable on a Ladder Diagram
- Compiling a Ladder Diagram
- Viewing the Variables in your Ladder Diagram
- Changing the Update Interval for a Ladder Diagram
For information on the properties of the Ladder Diagram database item, see Logic Program Properties and Values.