This setting is disabled when [Number of
States] is 2 or less.
The lamp does not display normally if the bit
states are outside the defined [Select State] options.
For example, if the [Number of States] is 3, you can use states 0,
1, and 2. Turning on bits 1 and 2 creates invalid state 3, and the
lamp state is not updated. If you change the screen with lamp from
another screen while the state 3, the lamp will not be
displayed.