Operate project
9.1 Basic principles of operation
TP 270, OP 270, MP 270B (WinCC flexible)
Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0
9-3
9.1.2 Operating the touch panel
9.1.2.1 Operating touch objects
Operation
Touch objects are touch-sensitive operating objects on the HMI device screen, e.g. buttons,
I/O fields and alarm windows. The operation of these is basically no different than the
operation of conventional keys. You operate these objects by touching them with your finger.
Caution
Always touch only one object on the screen. Do not touch several touch objects
simultaneously. You may trigger an unintended action.
Caution
To avoid damaging the plastic surface of the touchscreen, do not use any pointed or sharp
objects to operate the screen.
Direct keys
With a PROFIBUS DP coupling, it is also possible to configure buttons for operation as direct
keys in order to allow rapid key operation. Rapid key operation is required for jog mode, for
example.
PROFIBUS DP direct keys on the HMI device are used to set bits in the I/O area of a
SIMATIC S7.
Note
Direct keys can only be triggered by touch and not by a mouse click from a connected
external USB mouse.
Note
With touch operation, direct keys are triggered regardless of the configured password
protection.
Notice
Direct keys are still active when the HMI device is in the "offline" mode.
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