Siemens OP15, Equipment Manual, Page: 63 / 177

7-13
Manual OP5, OP15
( ) J31069-D0840-U001-A2-7618
If the remaining buffer size is still not freed by this action, more messages
are deleted, in the following order, until it is depleted:
Acknowledged alarm messages yet to depart
Unacknowledged alarm messages that have already departed
Unacknowledged alarm messages yet to depart.
If a log layout has been configured and a printer ready for operation is at-
tached to the OP, forced printout of all deleted messages is enabled .
7.5.3 Automatically Deleting the Event Buffer upon Buffer Overflow
By default, an overflow warning is output to the display when the event buff-
er reaches the configured remaining buffer size. Output of the overflow warn-
ing can be enabled and disabled online by means of the standard screen
Events
→
Overflow. If the event buffer cannot accept any more messages,
those which have already departed are the first to be deleted automatically
until such time as the configured remaining buffer size is reached.
If the remaining buffer size is not freed by this action, as many of the oldest
event messages are deleted – irrespective of priority and message status (ar-
rived, departed) – as are necessary to restore the configured remaining buffer
size.
If the remaining buffer size is still not available, as many of the oldest wait-
ing messages are deleted as are necessary to restore the remaining buffer size.
If a log layout has been configured and a printer ready for operation is at-
tached to the OP, forced printout of all the deleted messages is enabled.
7.5.4 Automatically Deleting the System Message Buffer upon Buffer
Overflow
If the system message buffer is completely full, the oldest message is deleted
automatically from the buffer when another system message occurs. There is
no overflow warning or forced printout of the deleted message, in the case of
event and alarm messages.
Deletion order
Forced printout
Remaining buffer
size and buffer
overflow
Forced printout
Definition
Message Handling