User manual

Microgate MicroGraph LED User Manual Page 69 of 88
3.2.1 ACTIVE OBJECTS
Among the display commands present there are 'Active Objects', i.e. predefined objects updated
automatically by the graphical display board. There are 4 different active object types:
 Internal display board time (Real Time Clock) in various formats: This is given by the quartz
inside the display board that works also without power supply. It is usually synchronized
with the time of day.
 Time of day in various formats: This is given by the precision quartz of the display board
that works only with enabled power supply. When it is turned on, it synchronizes with the
RTC.
 Date in various formats
 Scrolling text
Each MicroGraph LED display board can display up to a maximum of 16 active objects, each one
characterized by an origin (X and Y coordinates of the start pixel, typically the one in the top left
corner of the display area). It is not possible to display simultaneously two active objects having
the same origin. If a command is sent to display an active object with the same coordinates as one
that is already active, the new object substitutes the previous one.
The command for displaying active objects must use a certain 'Graphic Header' (ESC - @ -
command – x_start – y_start – binary operator – font).
There is an appropriate command for stopping the displaying of an active object.
3.2.2 PROPORTIONAL AND NON-PROPORTIONAL FONTS
In text frames, as well as in graphical frames, some fonts can be displayed in non-proportional and
in proportional mode:
 non-proportional fonts have letters, numbers, punctuation marks and spaces of the same
width
 proportional fonts have:
o numbers of the same width
o punctuation marks of the same width (but narrower than numbers)
o letters of variable width
o spaces with the same width as numbers
o non-braking space of the same width as punctuation marks and corresponding to
the ASCII 255