# Working with the Sources Tab

Controller features, such as the Low Reaction Tightening Strategies and controller-wide functions among others, require licenses distributed through the Functionality Management System (FMS). Whereas configuration of features is possible without specific licenses, the assignment and use of those features will require the correct license to be installed on the controller. Please refer to Licenses (FMS) for more detailed information on licenses.

External signals used as tasks for tightenings are configured in the Sources menu. Sources are accessories or similar connected to a virtual station. Two types of source tasks are available:

- Source Tightening task

- Source Batch task

Source Tightening is used to select a single tightening program.

Source Batch is used to select a batch sequence, a series of tightening programs.

For more information about selection of tasks, see Assigning a Task to a Virtual Station.

In this Section

- Source Tightening
- Source Batch Sequence