Actions are used to associate a step with a specific response. The response can be change the state or value of one of the Sequential Function Block's variables, or can be to initiate a method for any database item. For example, an action can be used to associate a step with the EnableAlarms method for a point. When the step is active, the action will initiate the EnableAlarms method for the relevant point.
To use an action on an SFC, you need to use the Actions window to add an action (see Add an Action to a Sequential Function Chart). When you have added an action, you need to configure it (see Edit an Action on a Sequential Function Chart).
If you are using an action to perform a method, you will need to add a method to the SFC (see Add a Method Variable to a Sequential Function Chart), and then configure the action to refer to the method (see Initiate a Method on a Sequential Function Chart).
When you use an action on an SFC, you will also need to configure an action association (see Action Associations). The action association defines when the action is initiated.