User Manual

Alarm management
Effects of BACnet properties on alarm response
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Fire protection damper timing with BO and two feedback addresses:
Fire protection damper timing with BO and two feedback addresses:
Error condition: The damper does not close quickly enough.
Neutral zone [Nz]
[Nz] (data type Real) can be used to define a switching hysteresis for the state transition TO_NORMAL1.
This is equivalent to the standard BACnet property Deadband.
Out of service [OoServ]
The following applies to alarm response:
[PrVal] can also change for [OoServ=TRUE].
[PrVal] is monitored for alarms irrespective of the source of any change in [PrVal]. In other words, the value
of [OoServ] does not affect the monitoring of OFFNORMAL alarms. If [OoServ = TRUE], the [Rlb] property
can be overwritten via BACnet. However, the alarm monitoring system responds to changes in Reliability in
the same way as if [OoServ=FALSE]. This makes it possible to simulate FAULT alarms.
In the BACnet Device Info object, this Boolean variable is FALSE at the very time when the operating state
is RUN, that is, when the D-MAP program is being run on the automation station. All the alarm-generating