L-DALI User Manual
174
LOYTEC
Version 5.2
LOYTEC electronics GmbH
filtering of properties that have a matching text in their name. For example, type “OPC” to
filter the OPC Tag property.
Data point properties common to all technologies:
Datapoint Name
: This is the technology-independent data point name. This name may
be longer than and different to the name of the native communication object (i.e.,
network variable). Data point names must be unique within a given folder. The
maximum length is limited to 64 ASCII characters.
Datapoint Path
: This informational property specifies the entire path of the data point
within the data point hierarchy. The maximum length is limited to 64 ASCII characters.
Datapoint Description
: This is a human-readable description of the data point. There
are no special restrictions for a description.
OPC Tag
: If enabled, the data point will be exposed to OPC. If not enabled, this data
point does not contribute to the limit of OPC tags.
Parameter
: If enabled, the data point will be exposed to the parameter file. Those data
points are visible to the LWEB-900 parameter view [5]. A parameter data point is also
persistent. See Section 6.1.5.
Use Pollcycle value as
: For input data points, this property defines whether the input
shall use a receive timeout or be constantly polling. See Section 6.1.2.
Poll on Startup
: For input data points this property defines, whether the data point
shall be polled once at start-up. Poll-on-startup can be enabled independently of the
poll cycle. See Section 6.1.2.
Pollcycle
: For input data points, this property defines the poll cycle in seconds. Set this
property to 0 to disable polling. See Section 6.1.2.
Receive Timeout
: For input data points, this property defines the receive timeout in
seconds. Set this property to 0 to disable polling. See Section 6.1.2.
Min Send
: For output data points, this property defines the min send time in seconds.
See Section 6.1.2.
Max Send
: For output data points, this property defines the max send time in seconds.
See Section 6.1.2.
Send-on-delta
: For output data points this property defines, if value updates shall be
sent only once they meet the COV condition of the data point. For analog data points
the analog COV increment is used. If not checked, updates are always transmitted
according to min and max send times. See Section 6.1.7.
Use Linear Scaling
: If this property is enabled, the analog values are pre-scaled from
the technology to the data point. This scaling is in addition to any technology-specific
scaling factors. If enabled, the properties
Custom Scaling Factor
and
Custom Scaling
Offset
accept the scaling factors. See Section 6.1.7.
Custom Scaling Factor, Custom Scaling Offset
: These properties only exist, if linear
scaling is enabled. They apply to analog data points only. See Section 6.1.7.
Only notify on COV
: This property assists for binary and multi-state input data points.
It defines, if a data point shall trigger an update only when the value changes or on
every write. If this is enabled, consecutive writes with the same value do not trigger an
update. If you want to convey every write, disable COV on the data point.
Persistent
: This property defines, if the last written value shall be stored as a persistent
value. Persistent data points restore that value after a restart from the persistent storage.
See Section 6.1.4.
Default Value
: This property defines a default value (see Section 6.1.3). Enter a
default value to enable this feature in the data point. Delete the value entirely to remove
