Siemens simatic hmi op7, Equipment Manual, Page: 65 / 196

7-7
Equipment Manual OP7, OP17
Release 04/99
7.2 Displaying Messages
Event and alarm messages are always output to the display at message level
and are displayed according to display and message priorities.
If several messages having identical display and message priorities exist si-
multaneously, the most recent is displayed in all cases, for both event and
alarm messages.
System messages always have top priority in so far as display is concerned;
unacknowledged alarm messages always have the second highest priority.
Otherwise, messages are displayed in different sequences depending on
whether separate or together output of event and alarm messages was config-
ured.
Message priorities of
1 (low) to
4 (high)
can be set within event and alarm messages in the configuration according to
their importance. If several messages of the same display priority exist simul-
taneously, they are displayed according to their message priorities, those with
the highest message priority being shown first and those with the lowest last.
Depening on the setting, either the oldest message (First) or the newest mes-
sage (Last) is displayed when there are several alarm messages present. You
can change this setting on the OP online via the standard screen System Set-
tings. To do this, select the standard screen System Settings
DispMsg and
set the appropriate parameter.
Display
Display priorities
Message priorities
Displaying the
first/last message