L-INX User Manual 98 LOYTEC
Version 4.0 LOYTEC electronics GmbH
BACnet trend logs are limited to interval and COV logs. The trigger mode is not supported
in BACnet. The setting linear and ring-buffer logging is mapped to the Stop_When_Full
property of the underlying BACnet trend log object. This setting in the Configurator
software is a default and can be overridden by writing to the Stop_When_Full property by
the OWS.
If an enable data point is configured by the Configurator software, the Log_Enable property
is written with the value of that data point. If no enable data point is configured, the
Log_Enable is TRUE as a default and can be modified over the network.
The fill-level action is mapped to generating a buffer event notification in the BACnet trend
log object. The fill-level trigger can still be used for e-mails even if no notification class is
configured in the BACnet trend log object. The fill-level percentage maps to the
Notification_Threshold property. The percentage setting in the Configurator software is a
default and can be changed by the OWS over the network.
5.6 IEC61131 Variables
IEC61131 variables are used to exchange data with the IEC61131 program. These variables
are represented in the data point configuration as register data points and can be connected
to other data points, e.g. to CEA-709 NV points, via data point connections.
In contrast to CEA-709 or BACnet variables, IEC61131 variables are always represented as
single data point. In case of scalar values (representing CEA-709 scalar or enumeration
types) one of the following basic data types might be used:
Double: A register of base type double is represented by an analog data point. It can
hold any scalar value. No specific scaling factors apply.
Signed Integer: A register of base type signed integer is represented by a multi-state
data point. This register can hold a set of discrete states, each identified by a signed
stats ID.
Boolean: A register of base type boolean is represented by a binary data point. This
register can hold a Boolean value.
Structured IEC61131 variables, representing for example structured NVs, or customer
defined IEC61131 structures, are stored as user type:
User: A user data point contains un-interpreted, user-defined data. The data is stored as
a byte array. A user data point does not include any other meta-data. This type of data
point also serves as a container for otherwise structured data points and represents the
entire data structure. User data points can only be connected to other user data points of
the same data length.
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