Operate project
9.1 Basic principles of operation
TP 270, OP 270, MP 270B (WinCC flexible)
9-4 Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0
Button action feedback
The HMI device outputs an acoustic and optical signal as soon as it detects the operation of
a touch object. This feedback is always output, regardless of communication with the PLC.
The feedback does not indicate whether the relevant action is actually executed or not.
Acoustic acknowledgement
The HMI device outputs a beep to signal operation of a touch object. You can disable this
beep.
Visual feedback
The type of visual feedback depends on the operated touch object:
• Buttons
The HMI device outputs different indicators of the "Touched" and "Not touched" states if
the programmer has configured a 3D effect.
UntouchedTouched
The programmer defines the layout of a selected field (e.g. line width and color of the
focus).
• Hidden buttons
The focus of hidden buttons is not set after marking (focus width value is 0 by default.) In
Runtime, the outline of a touched button is indicated as a line when you modify the focus
with value in the configuration data. This outline remains visible until the focus is set on
another operating object.
• I/O fields
After you touch an I/O field, a screen keyboard appears as a feedback signal.
Operating screen objects with buttons
Screen objects with predefined buttons can also be operated with external buttons. This
requires the programmer to have linked the relevant system functions to these buttons.
In WinCC flexible, these system functions are organized in the "Keyboard actions for screen
objects" group.
See also
Volume & Sounds (Page 6-17)
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