Clean Screen For Touch Hmi Devices; Chemical Resistance - Siemens SIMATIC TP900 Comfort INOX PCT Compact Operating Instructions

4.4

Clean screen for Touch HMI devices

The touch screen of the HMI device can be cleaned when it is switched on and a project is
running. An operating element must be available in the project that can be used to call the
"clean" screen. Once the clean screen is activated, touch screen operation is locked for a
configured period of time. Depending on the software setting, the lockout time can be
between 10 and 300 (default setting 30) seconds. The time remaining for the lockout is
indicated by a progress bar.
Note
Unintentional responses
When cleaning the touch screen, touching icons on the screen may cause unintentional
reactions in the HMI device.
Always open the clean screen or switch off the HMI device before you clean the touch
screen while the system is running.
Cannot be operated when the clean screen is active
When the clean screen is active, operations on the HMI device are not possible.
Wait for the period of the clean screen to lapse. Then you can operate the system again with
the HMI device.
4.5

Chemical Resistance

Impermissible and unsuitable cleaning agents may cause damage to the HMI device (see
General cleaning instructions).
Stainless steel front
Information on the resistance of stainless steel:
● The stainless steel surface is not fully resistant against the chemicals listed below:
– Hydrochloric acid
– Sulphuric acid
– Sodium hydroxide
– Chlorine
– Chlorides
Do not clean the stainless steel surface with these chemicals or with similar acids or
caustic solutions.
● Acid steam develops, for example, when tiles are cleaned with hydrochloric acid, and is
also harmful to the stainless steel. If the stainless steel parts are unintentionally
contaminated with hydrochloric acid, rinse these off immediately with plenty of water.
● Clean the stainless steel surface with a cleansing agent without active chlorine.
Comfort Panels INOX PCT
Compact Operating Instructions, 05/2018, A5E38804191-AA
Maintenance and repairs
4.4 Clean screen for Touch HMI devices
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