Siemens Simatic M7-400 Reference Manual page 449

Key Control within the Setup Menu
The following keys are used for control within the Setup menu and the associated
setup page (conforming to the Windows
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
With this key, you jump to the first line of a list box,
edit box, check box, or option button.
If the cursor is at a button (OK, CANCEL, ...) or at a selected
line (inverse video) within a list box, you can activate the function
with .
If the cursor is not at a button when you press
this executes the same function as an activated OK button:
Return to the Setup menu with any changes made in the
setup page being retained.
This key executes the same function as a CANCEL button:
Return to Setup menu with any changes in the setup page being
deleted.
With this key, you can move the cursor from one box to the next
box or to the next button.
With this key, you can move the cursor from one box to the next
box or to the next button (only locally, not under Remote Setup).
TM
Standard):
CPUs for M7-400
11-21