Insert a Use Auto Scheduled Resource step and select Edit Auto Scheduled Resource Settings or Step Settings from the context menu to display the Auto Scheduled Resource Settings edit tab in the TestStand Sequence Editor .

The following operations are available when you use the Use Auto Scheduled Resource step type:

• Resource Lock Alternatives —A list of lock names or reference expressions . The list must consist of at least one lock name or reference expression. The step attempts to acquire the first lock in the list. If the lock is not available, the step attempts to acquire the next lock, and so forth, until it successfully acquires a lock. If the step cannot acquire a lock, the step proceeds to the next Use Auto Scheduled Resource step in the same Auto Schedule block.

  Specify alternative locks if the steps in the Use Auto Scheduled Resource sub-block can execute with more than one set of resources. For example, you can specify alternative locks " DAQCard1 " and " DAQCard2 " if the steps can execute with either card, depending on which card is available. Specify an array of lock names for a single item to lock multiple resources. For example, you can use the expression {"DAQCard1", "DAQCard2"} if the steps require both devices to execute. This operation is atomic, and neither resource is acquired unless both resources are available.

  • Add —Adds a new empty lock name or reference expression to the end of the list.
  • Delete —Deletes the currently selected item.
  • Move Up —Moves the currently selected item up one place in the list.
  • Move Down —Moves the currently selected item down one place in the list.
• Acquired Lock (optional output string) —An expression that specifies a string variable or property into which to store the lock alternative the step acquires during execution. To identify the alternative lock it selects, the step stores the unevaluated alternative lock expression, exactly as the expression appears in the list.

See Also

Synchronization Step Types