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ifm
Programming Manual BasicDisplay CR0452 v03.02
05 / 2018
System description
Software description
>
Visualisation limits
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Embedded displays, used e.g. in
ecomatmobile
devices, cannot provide the full colour scope of
bitmap graphics because the available power reserves are restricted. Nevertheless, the following
preparations enable bitmap images in the device:
Correct selection of the motifs,
clever shifting of colours or
clever compilation of a colour palette and
the correct scaling of the bitmaps before using them in the device.
Performance limits of the device
(
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Parameter
Limitation CR0451
Limitation CR0452
File type
Bitmap (*.bmp)
File name
Only small letters, naming convention = 8.3
Image size
320 x 240 pixels
480 x 272 pixels
Colours
8 bit = 28 colours = 256 colours can be represented
Required memory space
< 76 Kbytes, depending on the image content for RLE compression
Table: specifications for the start image
The graphics used in the project may be larger than the specified image size. In this case, however,
only a (selectable) section of the image will be visible.
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Colours:
The device supports 2
8
(= 256) colour nuances.
► Create bitmap (BMP) with 256 colours:
>
Resample / scale image
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If an image is loaded in the device which does not meet the requirements for size or colour, it is
resized before it is displayed and the colours used are "checked".
Each time the image is opened, it must be resampled. This often leads to much longer times to
change from one image to the other. Corrective measures:
► First carry out all transformations of the bitmap or the image in an image processing program on
your computer.
Only for BasicDisplay: The colour palette is adapted when the image is integrated into the project
by CODESYS. On the device itself no adaptations will be made (size, scaling, colour).
► Only save the suitably transformed images in the visualisation of the device.
