Hardware
Device Description Embedded HMI-PLC XV-23x-57
Notes on the touch screen
10 N
OTES ON THE TOUCH SCREEN
10.1 R
ESISTIVE TOUCH
Basic touch screen function
Resistive touch panels are based on two resistive foils or glass panels that are kept apart by means of
small spacers. The foils are contacted at the edges and thus connected to the evaluation circuit. A
slight touch pressure causes an electrical contact. Due to the voltage divider principle, a specific
current or resistance value is generated according to where the touch actuation occurred. A controller
evaluates these changes on touch contact and thus determines the touch position.
Actuation
The resistive touch panel must only be actuated with a special pen (supplied with the accessories) or
with a finger. When wearing gloves, these must be clean and must not be covered with abrasive dust
or sharp particles. The touch panel must not be operated with pointed objects or any writing
equipment (pens, pencil etc.).
Calibration
The resistive touch panel has to be calibrated on initial startup. In a dialog, the marked position must
be touched with the stylus. The touch panel can be recalibrated as required.
This calibration is carried out via the Control Panel.
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Further information: PANEL with WindowsCE [3]
Cleaning the Touch Screen
Only clean the touch foil with a non-abrasive cleaning material. Do not expose the front of the device
to solvents which may corrode and destroy the foil (foil material: polyester (PET); Carrier plate:
aluminum).
The touch panel must only be actuated with a special pen or with a finger.
12/05 AWB2776-1581GB
© by Moeller GmbH
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