HMI, sensitive area of touch screen operating units

Question:

What does the compiler fault indication 'sensible area overwritten by another field' mean?

Answer:

The touch screen operator units H510 and H520are operated not by a keypad but by a sensitive display which is divided in lines and columns, which form a raster.

H510: 20x8 cells with a raster size of 12x16 pixels
H520: 40x30 cells with a raster size of 16x16 pixels

The fault indication 'sensible area overwritten by another field' is displayed, if during positioning of the touch keys / fields with the attribute 'input enabled' it was not considered that

•  the touch keys / fields are not allowed to overlap,
• the touch keys / fields do not use the same cells (see figure).

Via the menu of the HMI designer the touch raster can be made visible. The touch keys / fields can be easily arranged at this raster.

Remark:
The fields can be positioned space-saving to one side, if they are clearly bigger than the selected operator panel (H510/H520).