Siemens Multi Panel MP270 SIMATIC HMI Equipment Manual page 41

Acknowledging alarm messages
Alarm messages must be acknowledged due to their importance. This
can be done manually on the MP270 or automatically by the PLC. The
message indicator illustrated continues to be displayed as long as alarm
messages are still present on the MP270, when this feature has been
configured (also refer to Page 4-11).
In order to acknowledge alarm messages manually, press the key
depicted to the right. The LED integrated in the key lights up when
unacknowledged alarm messages are present.
Message buffer
The MP270 stores message events concerning alarm and event messages in a
temporary message buffer. The message buffer can store up to 1024 message
events.
The messages in the buffer can be
displayed on the screen (Page 5-9)
printed out on a connected printer (Page 5-5)
Message archive
The MP270 stores all message events permanently in a message archive, as
opposed to the volatile message buffer. The size and storage medium is defined by
the configuration operator in ProTool. The stored data can be evaluated using the
message display (Page 5-10).
Display types
The events stored in the message buffer can be displayed according to various
filter criteria, depending on the configuration. The MP270 provides the following
possibilities to display messages:
Message line (Page 5-6)
Message window (Page 5-7)
Message page (Page 5-8)
Message buffer (Page 5-9)
Message view (Page 5-10)
Print messages
When correspondingly configured, event messages can be printed out directly
when the message events Arrived and Departed occur, and also alarm messages
when the event Acknowledged occurs. System messages are not logged.
Information on setting printer parameters is provided in Chapter 6.
MP270 Equipment Manual
Release 01/99
Operating Special Screen Objects
5-5