Siemens SIMATIC HMI Mobile Panel 277 RO Operating Instructions Manual page 61

Circuit diagram
The figure below shows the operating positions and interconnections of the enabling button.
Switch settings
The primary function of the evaluating logic is to recognize the three switch settings:
The following figure shows the switching sequence during normal usage.
Mobile Panel 277 RO
Operating Instructions, 10/2015, A5E36824256-AA
Switch setting
1 Neutral position
2
3
5.1 Operator controls and displays on the Mobile Panel 277 RO
Functions Enabling button
Not activated
Enable
Panic
Operator controls and displays
Switch state
OFF (open)
Activated ON (closed)
Pressed OFF (open)
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