Siemens PC 870 - Manual (Page 19)

Description of Device
2-3
SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual
Edition 07/01
2.1.2 Keyboard
The keyboard is subdivided into different functional groups of keys:
S function keys, soft keys
S control keys
S alpha keys
S numeric keys
S cursor keys
The function keys arranged on the left and right of the display and in
two rows at the bottom of the display possess LEDs and can
be assigned freely.
...
Fig. 2-2 Function keys
The control keys are used for higher–level editing and control functions
in the different applications:
Tabulator
Open help
Delete
Insert
Backspace
Cancel
Acknowledge
Confirm
entry
F
N:
Switch to enable entering
of special characters using
the alpha and numeric keys
ALT key
CTRL key
SHIFT
:
Switch between
lower-case and
upper-case letters
Fig. 2-3 Control keys
Function keys,
soft keys
Control keys