Problem
The MultiTouch no longer works on a Linux Taget.
Codesys code and application example:
On newer Linux PLCs with a Target Visualization, it can happen that the MultiTouch functions are no longer completely or incorrectly executed as expected.
Solution
In the PLC ".cfg" configuration file, the MultiTouch option must be activated and configured as follows:
Touchsupport=6
On Windows Runtime based platforms, the option is not needed because here the detection is automatic, but on Linux platforms it can be a problem.
Related Information:
#define CMPTARGETVISU_KEY_TOUCHSUPPORT “Touchsupport”
Setting affecting the way the support of touch/multi-touch features is detected. The following values are possible at the moment:
o 0: No touch support at all
o 1: Derive touch support from the according operating system window
o 2: Explicitly activate single touch support
o 6: Explicitly activate multi touch support (includes single touch in fact)