Transitions in FBD
Use →transitions in order to create a step sequence (an →SFC network).
Several transitions are allowed per SFC network. See the notes under SFC elements in drawing field how to create/use SFC networks efficiently and correctly.
Each transition requires at least one predecessor step, one successor step and one transition condition.
Lines visualize the connections to the other FBD-elements in the drawing field.
Representation
Example for a transition, the name of the transition is not visible:
The transition input in is located on the top edge, the transition output out on the bottom edge, the input for the transition condition T on the left edge.
The transition input and the transition output are connected to →steps, the input for the transition condition is connected to a Boolean →variable or →literal (e.g. a →value field containing a Boolean variable).
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.
Actions for transitions
Page:Moving FBD-elements