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Message Function
Message function is responsible for warning the
user of changing conditions which require
immediate attention.
When a new message exists, the MSG annunciator
flashes on and off approximately twice per second,
until either the user views the new message, or the
condition causing the message goes away. If
multiple messages exist, the annunciator continues
to flash until all new messages have been viewed.
Most new messages continue to be relevant
following viewing of the new message, and are put
into the old message list, where they remain until
the condition causing the message goes away. Other
messages are cleared from the message list as soon
as they are viewed (they don’t become old
messages). The decision whether a new message
becomes an old message after viewing is described
for each individual case below in the List of
Messages section. The formats of all messages are
the same if they are in the new or old message list.
While any old message exists, the MSG annunciator
remains steadily on at all times unless new
messages arrive or all old message conditions go
away.
The home page in message mode is the first new
message, if one exists, or the New Message
Summary page if no new messages exist.
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Message Function