Change the connection key set up on each display unit.
If you forget the connection key, you will not be able to connect to the display unit.
For details about the setting screen, refer to the setting guide.
M.17.4.3 Set Password - Connection Key
Enter offline mode and touch [Password Settings] in the item change over buttons.
When using GP-4100 Series (Monochrome Model), touch [Password].
In the [Password Settings] screen, touch [Connection Key].
The [Connection Key] screen opens. Touch the [Enter current connection key] field to display a keypad and enter the current key.
When the [Enter new connection key] field appears, enter the new key.
Touch [Save].