Use ST Expressions in Graphic Language

The KAS-IDE enables any complex ST expression to be associated with a graphic element in either FFLD or FBD language.

• This feature makes it possible to simplify FFLD and FBD diagrams when a trivial calculation has to be entered.
  • It also enables you to use graphic features for representing a main algorithm as text is used for details of implementation.
• Expression must be written in Structured Text (ST) language.
  • An expression is anything you can imagine between parentheses in an ST program.
  • The ST expression must fit the data type required by the diagram (e.g., an expression put on a contact must be Boolean).

FBD Language Example

A complex ST expression can be entered in any variable box of an FBD diagram if the box is not connected on its input.

FFLD Language Example

A complex ST expression can be entered on any kind of contact and on any input of a function or function block.