Siemens Simatic MP 377 Operating Instructions Manual page 86

Calibrating the touch screen
Introduction
Depending on the mounting position and viewing angle, it is possible that parallax may occur when operating the touch
screen. To prevent any resulting operating errors, you may need to calibrate the touch screen during the startup phase or
while in runtime.
The touch screen is calibrated using 25 calibration points. This setup makes for extremely accurate calibration.
Requirement
You have opened the "OP Properties" dialog, "Touch" tab, with the "OP" icon.
Procedure
You use the calibration arrows to calibrate the edge area of the touch screen and calibration crosses to calibrate the central
area. To complete the calibration process, press the "Confirm" button.
NOTICE
Timeout after five seconds
Calibration arrows, calibration crosshairs and the "Confirm" button must be touched within a period of five seconds.
Otherwise the calibration is cancelled and the "OP Properties" dialog appears again.
Precise contact is necessary
The calibration arrows react to contact precisely at their tips and the calibration crosshairs react to contact precisely at their
center.
When calibrating, make sure that you touch exactly the tip of the calibration arrows and exactly the center of the calibration
crosshairs.
Always use the same finger
Make sure that you always touch the calibration points with the same finger of the same hand. Otherwise the touch screen
is incorrectly calibrated.
14
MP 377 15" Touch daylight readable
A5E02341631-03, 06/2009