Siemens SIMATIC S7-1500 Getting Started page 10

Automation task
1.2 Sample project
Displaying the CMYK and RGB values
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When the required color mixture is selected in the HMI screen "Recipes", the values
are displayed in the CMYK color space by means of a bar diagram.
The color mixture can be shown with an additional display. This requires the
"Recipescreen" script to be run.
You run the "Recipescreen" script by clicking the "Display RGB Value" button. The
script assigns the RGB value assigned to the CMYK value to the display, because
CMYK values cannot be output directly on screens.
The required RGB value is calculated by the "SCL_Convert_CMYK_TO_RGB"
program block.
Getting Started, 05/2014, A5E03981761-AC
S7-1500