Transition / Transition condition

Between the steps there are so-called transitions.

A transition condition must have the value TRUE or FALSE. Thus it can consist of either a boolean variable, a boolean address or a boolean constant. It can also contain a series of instructions having a boolean result, either in ST syntax (e.g. (i<= 100) AND b) or in any language desired (see ‘Extras’ ‘Zoom Action/Transition’). But a transition may not contain programs, function blocks or assignments!

In the SFC-Editor a transition condition can be written directly at the transition symbol or an own editor window can be opened for entering the condition ( ‘Extras’ ‘Zoom Action/Transition’). Regard that the instructions entered in the editor window  will take precedence!

Note

Besides transitions, inching mode can also be used to skip to the next step.