6-8
OP27,
OP37 Equipment Manual
Release 05/99
6.2 Displaying
Messages
All
message events are written in the message archive in chronological order
.
Message events are composed of the arrival, departure and acknowledgment of a
message. Up to 512 message events can be stored in the message archive of the
OP
. Every message event is stored with the following information:
message number
event identifier
(K
for arrived,
G
for departed,
Q
for acknowledged),
time of the event with date and time of day
acknowledgment group (alarm messages)
message text
values of tags at the time of arrival or departure.
If a message contains process values, the values stored in the message archive
are those which were available when the message event arrived or departed.
The OP does not record any current process values for the
Acknowledged
mes
-
sage status. The value is replaced by
###
characters. Figure 6-2 illustrates the
structure of the message archive.
0000049 K 11:32:00 27.03.97 QGR:01
Boiler pressure too high: 12,7 bar
0000049 KQ 11:33:20 27.03.97 QGR:01
Boiler pressure too high: #### bar
0000010 K 11:34:36 27.03.97 QGR:02
Oil supply stopped
0000010 KQ 11:35:18 27.03.97 QGR:02
Oil supply stopped
Message
number
Message status
T
ime and date (time of arrival)
Process value (time of arrival)
Acknowledgment group
Figure 6-2 Storing
message events in the message archive
Message
archive
Messages
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