Three function block execution parameters influence the runtime execution of the function block within the application configuration.
- Execution order
- Cycle time
- Instance number
When a new function block is inserted, these parameters are shown in the Function Block Instance dialog box in Application Configuration. The three parameters are selectable or not selectable depending on the function block type. The cycle time is predefined to one value. The instance number is a counter for the total possible number of function blocks of that type used within the application configuration.
Execution Order and Instance Number are a combination that is predefined within a product. It is possible to select a pair out of the list.
Cycle Time is automatically set and it cannot be modified.