Properties fields
Use properties fields in →FBD to specify properties (e.g. requirements) at any position within the function logic.
A properties field is similar to a →comment field. Observe the following differences:
For a better distinction, the properties fields are displayed with a different color than the comment fields.
A property statement must be entered within the property field – analogous to the property statements in ST but without the enclosing characters: { }; of ST.
See the following representation for an example. In case of another input, it is not possible to exit the input mode of the property field.The content of a properties field is transferred to the generated code as comment.
Representation
Example for a properties field with one requirement:
It is possible to enter several lines within a property field. See "Creating or editing properties fields in FBD" for the syntax.
Depending on the configuration of your logi.CAD 3 version, the FBD-editor and its elements might be displayed differently in your logi.CAD 3 version than illustrated in the IDE documentation. This is the case, if logi.cals or the system integrator has changed the styles for the FBD-editor. Subsequently, the illustration in the IDE documentation are symbolic images and the representation in your logi.CAD 3 version takes precedence for the valid representation. In case of doubts, please contact logi.cals or your system integrator.
logi.cals recommends that you and/or your system integrator do not use yellow shades when designing FBD-elements because the color "Yellow" is used for tracking safe signals when developing safety-related applications. logi.CAD 3 does not check if colors are already used elsewhere. So the use of the yellow shades by you and/or your system integrator could have the consequence that "yellow" might also identify a non-safe logic as well.