Activate and adjust lcd brightness TDE LOGO

Flags for controlling the backlight of the LOGO! Display or TDE display

Of the 64 digital flags of LOGO! available to the user only 56 for free use, the other 8 are used for system functions.

M8 = startup flag (as with previous versions). After the start (1 cycle) it is but then the users disposal.
M25 = white backlight LOGO! Display.
M26 = white backlight display TDE.
M27 = character switching in the message texts.
M28 = amber backlight LOGO! Display.
M29 = red backlight LOGO! Display.
M30 = yellowamber backlight display TDE.
M31 = red backlight display TDE.

Will M25 and M26 used in the program, the display backlight turns with keystrokes not counted independently. If you want it back, you have to-or operations, the control of these two markers with the keys.

Here is a little example for using backlight flags.

Please note:
The flags have different priorities.
The lowest priority have the flag for the white light.
The medium priority have the flag for the yellow light.
The highest priority have the flags for the red light.

This means e.g .:
If the markers are simultaneously driven for the white and the red backlight, the red backlight displays.