Siemens SIMATIC TP900 Comfort INOX PCT Compact Operating Instructions page 17

Notes on operation
Note
Do not touch the touch screen during startup
The device automatically calibrates the capacitive single-touch screen during startup. The
touch screen is locked during calibration.
Do not touch the touch screen during startup. Make sure that you do not rest on the touch
screen with the palm of your hand during startup.
Make sure that there are no conductive liquids on the touch screen during startup.
Note when operating the capacitive single-touch screen:
● Surface contact with a diameter of about 5 to 20 mm is required for an operator action to
be detected.
Touch the touch screen with the finger tip, vertically to the surface.
● An operation with gloves with a material thickness of <2 mm is detected in most cases.
However, check the usefulness of the gloves you are using.
● To avoid incorrect operation, certain inputs are ignored and blocked from further entry:
– Simultaneous operation with multiple fingers.
– Surface contact with a diameter of > 3 cm, for example, resting the palm of the hand
– As soon as the touch screen is no longer touched, input is possible again.
Functions of the capacitive single-touch screen
General functions
● Automatic calibration of the touch screen during startup; manual calibration is not
necessary. For this reason, the "Touch" tab in the "OP Properties" dialog is not available
for the PCT devices.
● Touch screen operation analog to the operating options that are available for devices with
resistive single touch screen.
Security functions in an industrial environment
The touch screen is locked for security reasons when following happens:
● There is a conductive liquid on the touch screen with ground contact via the enclosure or
the operator, for example.
● Electromagnetic interference is present that exceeds the specification according to EN
61000-4-2.
Once the interference is over, the touch screen is no longer locked.
Comfort Panels INOX PCT
Compact Operating Instructions, 05/2018, A5E38804191-AA
on the touch screen
Safety instructions and additional information
2.5 Notes on commissioning and operating
17