# Remote Display Number

The application reads the value of the connection and opens the graphic display whose display number corresponds to the value. If the value is zero, the operator has control of display changes. If the value does not match any display's number, the application sends a message to Diagnostics.

If you assign this connection, remote display changes occur whether or not the logged-in user has security access to a given display.

If you want to use global connections, you must make sure that each display has its own unique number.

Assign an analog tag or an expression to this connection. Do not assign an expression consisting of a constant to this connection. If you do, the display whose number matches the constant opens and can never be closed or changed.

Tip: | If the remote screen change opens too many On Top displays, the application may run out of memory, or so many tags may be on scan that performance will suffer.

## See also

Set up global connections - Display tab