Configure the safety task

Each safety application must contain one, and only one, safety task. FactoryTalk Design Studio creates a safety task within a safety application when you add a safety controller. For more details on safety tasks, see the 
Develop Safety Applications in FactoryTalk Design Studio Programming Manual
 (publication FTDS-PM001).
Use the
Properties
pane to edit the properties of the safety task.
  1. On the explorer bar, select Execution icon
    Execution
    .
  2. Expand the folder of the controller.
  3. Expand the
    Tasks
    folder and select the safety task.
  4. In
    Properties
    on the
    Configuration
    tab, configure these settings:
    • Type
      . The safety task is defined by having its Type property set to
      Safety
      .
    • Period
      . Enter the frequency to perform the safety task in whole milliseconds from 1 to 500. Reducing the Period rate increases how often the task performs. Increasing the frequency causes other tasks in the controller to perform at a slower rate.
    • Priority
      . Enter the priority level of the safety task. Lower numbers indicate higher priorities for tasks. A task assigned a priority of 1 is a higher priority task than a task assigned a priority of 15.
    • Watchdog
      . The safety task watchdog is the maximum time that is allowed from the start of the safety task to its completion. If a safety task watchdog timeout occurs, a nonrecoverable safety fault is generated in the controller.
    TIP: You cannot inhibit a safety task or select
    Disable automatic output processing to reduce task overhead
    .
  5. In
    Properties
    , select the
    Program Schedule
     tab and configure the schedule:
    • Under
      Scheduled
      , drag and drop programs in the list to change the execution order of the programs.
    • Under
      Unscheduled
      , drag and drop programs into the
      Scheduled
      list.
  6. Select
    Apply
    .
Provide Feedback
Have questions or feedback about this documentation? Please submit your feedback here.
Normal