Appendix
A.2 Evaluation of the operator control elements
Mobile Panel 177 (WinCC flexible)
Operating Instructions (Compact), Edition 07/2005
A-13
A.2.3.3 Illuminated pushbutton
Application
The illuminated pushbutton is an optional operator control element of the Mobile Panel 177.
The integrated LED can be actuated from the PLC.
The LED can assume the following states:
• Off
• Slow flashing
• Rapid flashing
• On
This allows the LED to signalise to the operator that he should operate the illuminated
pushbutton in the active project.
Bit assignment
The following table shows the bit assignment for the status tag of the illuminated pushbutton:
Bit 0 Status of the illuminated pushbutton
0 Pressed
1 Not pressed
The following table shows the bit assignment for the LED tag of the illuminated pushbutton:
Bit n+1 Bit n LED status
0 0 Off
0 1 Rapid flashing
1 0 Slow flashing
1 1 On (continuous)
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