Define a Step as the First Step in a Sequential Function Chart

You need to define a step as the initial step so that the Sequential Function Chart (SFC) can determine which step it needs to perform first. To do this, you have to use the Initial Step feature.

To define a step as the first step in an SFC:

1. Display the SFC in Design mode (see Display a Sequential Function Chart).
2. Right-click on the step that is to be the first step in the SFC.
   A context sensitive menu is displayed.
3. Select the Initial Step option.
   The step is set to be the first step. Two vertical lines are added to the step to indicate it is the first step in a sequence