Siemens OP15, Equipment Manual, Page: 62 / 177

7-12
Manual OP5, OP15
( ) J31069-D0840-U001-A2-7618
7.5 Deleting Messages
Event and alarm messages are stored automatically in the event and alarm
buffers, respectively. Each of these buffers can contain as many as 256
events. To prevent a buffer overflowing, you should delete event and alarm
messages from the buffer.
Messages from the event and alarm buffers are deleted
by means of a standard screen or
automatically upon buffer overflow.
System messages are deleted automatically only when the buffer overflows.
7.5.1 Deleting Event and Alarm Messages Using Standard Screens
Standard screens can be used to delete
all (not individual) acknowledged and departed alarm messages
all (not individual) arrived and departed event messages.
To delete event and alarm messages, proceed as follows:
Depending on the type of message you want to delete, choose one of two
standard screens, either Alarms
→
Delete (for alarm messages) or Events
→
Delete (for event messages).
Delete buffer: Press ENTER.
Do not delete buffer: Press ESCAPE.
7.5.2 Automatically Deleting the Alarm Buffer upon Buffer Overflow
By default, an overflow warning is output to the display when the alarm buffer
reaches the configured remaining buffer size. Output of the overflow warning
can be enabled and disabled online by means of the standard screen Alarms
→
Overflow. If the alarm buffer cannot accept any more messages, those which
have been acknowledged and have departed are the first to be deleted automati-
cally until such time as the configured remaining buffer size is reached.
Preventing a buffer
overflow
Overview
Remaining buffer
size and buffer
overflow
Message Handling