L-DALI User Manual
136
LOYTEC
Version 5.2
LOYTEC electronics GmbH
BACnet data points can be auto-generated from other data point sources (see Section 6.3.3).
Only BACnet server objects can be generated and the connected value is reflected in the
Present_Value property. Which type of BACnet object is created depends on the type of the
source data point or of the source structure member. For analog sources, analog objects are
created. The best-matching BACnet engineering unit is chosen. Other properties of analog
objects are copied from the source data point, including min and max present value. Multi-
state objects are created for source enumeration types. Which state IDs exist is documented
in the BACnet multi-state texts array. This information is copied from the source and made
compatible with BACnet restrictions by renumbering state IDs.
Normally BACnet AI, BI, MI are created out of input source data points and AO, BO, MO
out of output source data points. The BACnet project settings allow changing this default to
BACnet value objects AV, BV, MI. In the auto-generate preview the user can review and
change those object types individually before generating the data points.
6.7 Regular Expressions
Some features of the Configurator use regular expressions to perform complex operations
on text. These apply to data point filters, naming rules and folder copy and rename. A
regular expression is a pattern that describes a set of strings. It is applied to an input text
and performs pattern-matching by evaluating the expression string consisting of literal
characters to match and meta-characters. Literals match themselves (
abc
matches exactly
‘abc’) whereas meta-characters may match one or more characters of the input text. The
available metacharacters are listed in Table 17. Regular expressions can handle
abbreviations, such as
\d
instead of
[0-9]
. The abbreviations provided are listed in Table