# Example: Use a control list selector

In this example, the control list selector enables an operator to use a list to select the mode of operation of a blower. The blower can operate manually or automatically, or it can be turned off.

1. Create a control list selector with three states.
2. Set the caption to "Off" for State 0, "Manual" for State 1, and "Automatic" for State 2.

The application monitors the tag you assign to the Value connection to control the operation mode. If the operator scrolls the list and selects an entry, the Value connection value changes, and the machine switches modes.

The operation mode can also be set by a supervisory system. The operator must be able to view the application’s local display to see which mode the machine is currently in. The application reads the Value connection and highlights the currently selected mode of operation.

## See also

How the control list selector works at run time

Causes of run-time errors for the control list selector

Set up connections for the control list selector

How Enter key handshaking works at run time