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TP27, TP37 Equipment Manual
Release 01/00
6.2 Displaying Messages
All message events are written in the message archive in chronological order.
Message events are the arrival, clearing and acknowledgment of a message. A
maximum of 512 message events can be stored in the Touch Panel message ar-
chive. Every message event is stored with the following information:
S message number
S event identifier
(A for arrived, D for cleared, K for acknowledged),
S time of the event with date and time of day
S acknowledgment group (alarm messages)
S message text
S values of tags at the time of arrival or clearing.
If a message contains process values, the values stored in the message archive
are those which were available when the message event arrived or has been
cleared. The Touch Panel does not record any current process values for the
Acknowledged message status. The value is replaced by ### characters. Fi-
gure 6-2 shows the structure of the message archive.
0000049 A 11:32:00 27.03.97 AGR:01
Boiler pressure too high: 12,7 bar
0000049 AK 11:33:20 27.03.97 AGR:01
Kesseldruck zu hoch: #### bar
0000010 A 11:34:36 27.03.97 AGR:02
Oil supply stopped
0000010 AK 11:35:18 27.03.97 AGR:02
Oil supply stopped
Message number
Message status
Time 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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