Alternative branch

Two or more branches in SFC can be defined as alternative branches. Each alternative branch must begin and end with a ‘Project’ ‘Passwords for user groups’. Alternative branches can contain Parallel branches and other alternative branches. An alternative branch begins at a horizontal line (alternative beginning) and ends at a horizontal line (alternative end) or with a Jump.

If the step which precedes the alternative beginning line is active, then the first transition of each alternative branch is evaluated from left to right. The first transition from the left whose transition condition has the value TRUE is opened and the following steps are activated (see Active step).