Siemens SIMATIC HMI Operating Instructions Manual page 108

Operator controls and displays
5.5 Operator controls
F
S
T1
T2
I
D
The bytes "n+6" to "n+9" contain the direct key bits for the touch buttons.
Bit coding
The following tables show the bit coding for function keys, key-operated switch, illuminated
pushbutton and handwheel:
● Bit coding of function keys
Not pressed
Pressed
● Bit coding of function key LEDs
LED not illuminated
LED is illuminated
● Bit coding of key-operated switch
● Bit coding of illuminated pushbuttons
108
Bit for function key
Bit for key-operated switch
Bit for left illuminated pushbutton
Bit for right illuminated pushbutton
Bit for handwheel pulses, forwards
Bit for handwheel pulses, backwards
State
State
State S1
Position 0 0
Position I 0
Position II 1
S0
0 In middle position
1 Turned in clockwise direction up to stop
0 Turned counter-clockwise up to stop
Operating Instructions, 12/2007, A5E01003940-01
F1 to F18
0
1
F1 to F18
0
1
Key position
Mobile Panel 277F IWLAN