Siemens simatic hmi op7, Equipment Manual

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11-1
Equipment Manual OP7, OP17
Release 04/99
Process-Dependent Operator Guidance
Different action is normally required or allowed in different operating
situations. To support changing requirements during process control, you can
configure the following measures, which provide the operator with situation-
specific purposeful help:
screen-dependent soft keys,
global function keys and
user-defined screen hierarchies.
11.1 Branching by Means of Soft Keys and Function Keys
You can assign function calls to the function keys on the OP7 and the OP17.
We distinguish in this instance between local and global assignment. Global
means that the assignment applies to the entire configuration. Local means
that the assignment applies to one screen entry only. This makes it possible
for the operator to initiate functions as and when required by the situation.
When the assignment of function keys may vary from screen entry to screen
entry, the keys are referred to as soft keys.
The following keys can be assigned as soft keys on the different devices:
OP7 The two tiers of keys F1 to F4 and K1 to K4 of the function keyboard
may be configured both as soft keys and global function keys.
OP17 The two tiers of keys F1 to F8 and K1 to K8 of the function keyboard
may be configured both as soft keys and global function keys.
Function keys K9 to K16 can be assigned only globally.
While configuring soft keys, you must make sure that function calls which
are required to be permanently available, i.e. also during screen editing, are
not assigned to keys which you intended to be soft keys.
Situation-specific
process control
Soft keys:
function keys with
a tag assignment
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