NOVUS V1.5x A - Manual (Page 44)

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ALARMS CONFIGURATION
After setting up all channels, you can configure alarms in order to indicate error or exception conditions. For this, we
must choose which channel must be used for the alarm, what is the alarm condition and what is the set point (trigger
value for the alarm). For example, you can select an analog temperature channel to alarm when the temperature
exceeds a critical threshold, or a digital input channel to alarm when your state is different from the expected value.
A hysteresis can be configured to prevent a marginal condition, such as an input that hovers around the set point value,
which would generate multiple alarm events. In some cases, like when the alarm channel is a digital input, the hysteresis
does not make much sense and should be maintained at “0”.
Whenever a digital channel is used for an alarm, hysteresis shall not be used (must be
configured with “0”)!
Each alarm can have one or more associated actions. You should then choose what actions should be performed on the
occurrence of an alarm or event (different actions organized by tabs). The available actions are the activation of relays,
the activation of digital outputs (assuming they are configured to be triggered by an alarm), the sending of e-mails to one
or more receivers (selected from among the ones configured on the Ethernet interface configuration page), sending a
SNMP trap and the start and/or stop of the loggings. Finally, when everything is set up, you should include the alarm in
the list clicking on the “Add” button.
By clicking on an alarm from the list on the left, its parameters are loaded into the fields on the right. To delete a channel
from the list, you must select it from the list and click on "Remove". To modify some parameter of an alarm, you must
select it from the list, change whatever you want and click on "Modify". The button "Delete all" deletes all alarms in the
list.
Alarms Configuration - Relays selection