Planar Wallnet Setup & Operation page 61

General notes about alerts:
• For Margay, Puma and Lion: Alert conditions
are tested every two minutes on the odd
minutes (:01, :03, etc.)
• For all other products: Alert conditions are
tested on a continuous basis. The serial
communications to check alert conditions are
evenly paced so that WallNet sends at most
only a few serial requests to the wall each
second. It takes 5-10 seconds per display to
check for alert conditions, depending on
which alerts are configured. Source absent
and no response alert emails are only sent
after a full cycle of checking conditions on
every display, since those alerts include
information for all the displays in the wall.
• Only configured (checked) alerts are tested.
• Alerts are sent only once for any condition.
For example, if a lamp fails the email is sent
once, not every two minutes. Whenever
WallNet observes a "good" or non-alert
condition for a previously sent alert, it clears
the record of the previous alert and will send
a new email if that event occurs again. If a
temperature is fluctuating around the alert
trigger point, an alert will be sent each time
the temperature dips below the trigger and
then goes above it again.
• The record of alerts sent is in volatile memory,
so if WallNet is rebooted, it will send all the
current alerts again.
Automatic Alerts
55