Three function block execution parameters have an influence on the runtime execution of the function block within the application configuration.
- Execution order
- Cycle time
- Instance number
Each time a new function block is inserted, these parameters are shown in the Function Block Instance dialog box in the Application Configuration tool. The three parameters are selectable and 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.
The 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.
The Cycle Time is automatically set and it cannot be modified.