# How the Interlocked push button works at run time

When the operator presses an Interlocked push button, it changes from State 0 to State 1 and sends the button value to the data source. When the operator presses another Interlocked push button, it changes from State 0 to State 1 and sends its button value to the data source, and the first button is set back to State 0.

When you open a display at run time, the application reads the Value connection. If the value matches the button value, the button is set to State 1. Otherwise, the button is set to State 0.

## See also

Causes of run-time errors for the Interlocked push button

Set up controls for the Interlocked push button