Honeywell Centraline FALCON, User Manual, Page: 104 / 276

FALCON USER GUIDE
EN2Z-0962GE51 R0715 100
ALARM HANDLING
Alarm Behavior of Datapoints
Event States For any datapoint type, an application and/or product specific value range is defined
in which the point is in the operating (event) state ´Normal`. If the point value has
changed due to exceptional situations, the event state of a datapoint can be either
´Off-Normal` or ´Fault`.
The event states can be briefly described as follows:
Normal
Point is in normal operating state.
Off-Normal
Point value is out of normal range.
Fault
Point is prevented from proper operation. Point value can be in normal or out of
normal range. Due to the maloperation of the point, the value is unreliable.
Causes for a fault can be, for example sensor and cable breaks. See “Status Flag
indications for details.
High Limit
Point value has exceeded the high limit. Special case of the Off-Normal state of
analog inputs and outputs (see also Alarm range properties in the table below).
Low Limit
Point value has dropped below the low limit. Special case of the Off-Normal state of
analog inputs and outputs (see also Alarm range properties in the table below).
The alarm range of a datapoint is defined by the datapoint´s specific alarm range
properties.
Examples:
Datapoint Type Alarm range properties
Analog input, analog output, analog
value, pulse converter High limit, low limit
Binary input, binary output, binary
value, mult-state input, multistate
value Alarm value
For information on the detailed alarm behavior of a particular point type, please refer
to the diagrams and descriptions in the following subsections.
Transition Events Whenever the event state of a datapoint changes, an alarm is generated by one of
the following transition events:
Back To-Normal
The alarm is going to normal operating state.
To Off-Normal
The alarm reaches off-normal state.
To Fault
The alarm originates in a (physical) fault such as sensor break, etc.
Any alarm caused by a transition event is indicated by the enabled ´Alarm` status
flag (see "Datapoint Status Flags" section).
Alarm Display / Alarm Notification A transition event is the triggering step that generates a notification which can be
received by the EBI, the Excel Web HTML Interface or a 3
rd
party BACnet client for