6-11
OP27, OP37 Equipment Manual
Release 05/99
6.3
Deleting Messages
All message events from event and alarm messages are stored automatically in
the message archive. The message archive can contain as many as 512 message
events. Message events are deleted
automatically in the case of buffer overflow
by means of the Message Processing standard screen.
On reaching the configured remaining buffer size, (default setting 10%), an
overflow warning is issued by default. Issue of the overflow warning can be
enabled or disabled on the OP by means of the System Settings standard screen.
To do so, open the input window in the
BUFFER
OVERFLOW
WARNING
symbolic
input field and select either of the parameters
OFF
or
ON
.
If the message archive is no longer capable of recording more message events,
message events are automatically deleted until the capacity configured for the
remaining buffer size is reached. Deletion occurs in the following sequence:
The oldest messages which have already departed.
The message events Arrived and Departed for an event message which has
departed are deleted. The message events Arrived, Departed and Acknowl-
edged are deleted in respect of alarm messages which have been cleared.
Messages still waiting.
If the capacity is still not sufficient for new messages, the oldest waiting
messages are deleted. This triggers the issue of a system message.
In the case of a buffer overflow, a printout of all the alarm and event messages
deleted is automatically triggered if
“Printout on overflow” is configured,
message logging is disabled on the OP and
a printer which is ready to operate is connected.
Purpose
Overflow warning
Deleting on buffer
overflow
Automatic printout
Messages
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