
L-DALI User Manual
117
LOYTEC
Version 5.2
LOYTEC electronics GmbH
lowLimit:
This property relation defines the low limit for analog alarms. It exists only,
if an alarm condition has been created.
deadband:
This property relation defines the dead band for analog alarms. It exists
only, if an alarm condition has been created.
nativeAlarm:
This property relation links to a technology data point, which is required
for alarms reported to another technology. It exists only, if an alarm condition has been
created and alarms are reported to the given technology (e.g. BACnet). This property
relation cannot be modified by the user.
reportTo:
This property relation exists only in generic alarm servers. It may be linked
to a technology alarm server to report alarms to that network technology.
totalActive, totalUnacked, totalAcked:
These property relations exist only in alarm
servers. They contain counters for active unacknowledged, inactive unacknowledged,
active acknowledged alarm records of the alarm server, respectively.
ackAll:
This property relation exists only in alarm servers. When writing TRUE, all
alarms on that alarm server are acknowledged.
historicFilter:
This property relation exists for data points that have at least one
historic filter assigned (see Section 6.4.6).
enable:
For Schedulers can be enabled or disabled by the use of this property relation.
If the enable data point has been defined in the scheduler’s configuration, this property
relation is linked to that data point.
enableFb:
This property relation shows the enable state of the scheduler. If the enable
feedback data point has been defined in the scheduler’s configuration, this property
relation is linked to that data point.
presetName:
This property relation of type string shows the preset name of the
currently scheduled value. If the preset name data point has been defined in the
scheduler’s configuration, this property relation is linked to that data point.
timeToNext:
This analog property relation contains the number of minutes till the next
scheduled state changes. It can be used to implement an optimum start algorithm.
nextState:
This property relation contains the next scheduled state. It can be used to
implement an optimum start algorithm.
nextPresetName:
This property relation contains the preset name of the next scheduled
state, if such name exists. Otherwise it stays at invalid value.
6.1.13
Convertible Engineering Units
Analog data points possess the engineering units property that defines the physical unit of
the underlying scalar value, e.g., “kg”. The engineering unit is displayed with a human-
readable text to the user. The text can be freely entered by the user to describe the nature of
the scalar value. The Configurator matches this text against its database of known
engineering units. If it can identify the unit, it is denoted as a
convertible unit
with a green
checkmark .
Convertible units are linked to additional meta-information in the metric (SI) or U.S. unit
system. For those units the Configurator can offer compatible units of the respective other
unit system, of different magnitude or different usage. Important properties of convertible
units when used are:
An alternative display unit can be configured that will be displayed on the Web UI of
the device.
Automatic unit conversion in local connections is performed, if data points with
compatible convertible units are connected (e.g. ‘1000 W’ are converted to ‘1 kW’).
No custom scaling is required.