Echelon OpenLNS - Manual (Page 591)

OpenLNS Programmer's Reference 554
GroupIdsAllocated
Summary Indicates the number of LonTalk group IDs that have been
allocated on the system.
Each set of connections in the system that use multicast
addressing must have a unique group ID. As a result, the
number of group IDs that have been allocated is critical to
networks with large numbers of connections and devices.
This property could be used by a network management
application to determine if the multicast connections that it’s
creating are efficiently using available network resources.
You can also use this property when merging two OpenLNS
databases to determine if they have more than a combined
total of 256 group IDs allocated (in which case, the merge
would fail).
You can limit the use of multicast addressing with your
applications using the AliasOptions and BroadcastOptions
properties of the ConnectDescTemplate object used by the
connection.
Availability Local, full, and lightweight clients.
Syntax count = networkResources. GroupIdsAllocated
Element Description
count The number of group IDs allocated on
the system . This property has a
range of 0–256, as each system
supports a total of 256 group IDs for
multicast addressing.
networkResources The NetworkResources object being
acted upon.
Data Type Long.
Read/Write Read only.
Added to API LNS Release 3.20.
Parent
Summary Returns the object that spawned the current child object. The
parent object is determined by the means in which a child
object is accessed, not by the OpenLNS Object hierarchy.
Availability Local, full, lightweight, and independent clients. Note that
some collection objects are not available to Independent
clients.
Syntax parentObject = object.Parent
Element Description
parentObject The object that is the parent of the
specified object.