Siemens SIMATIC Box PC 820 Manual page 112

Keyboard Controller (PC FI45 V2)
The special keys and function keys of the SIMATIC PC have the following default
assignments:
Membrane Direct key no.
key
F1 to F8 1 to 8
F9 to F12 9 to 12
F13 to F16 13 to 16
S1 to S8 17 to 24
S9 to S16 25 to 32
F17–F20 –
Note
The direct keys can only be used in conjunction with the direct key module
(optional).
3-6
Digital I/O (byte bit)
DI 0.0 to DI 0.7 F1 to F8
DI 1.0 to DI 1.3 F9 to F12
DI 1.4 to DI 1.7 –
DI 4.0 to DI 4.7 –
DI 5.0 to DI 5.7 –
– –
PC AT key Remarks
PC key without-repeat
PC key without auto-repeat
–
–
–
–
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03