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OpenLNS Programmer's Reference 819
Summary
Contains the subnet ID of the device that generated the
network variable or message monitor point update.
A device's SubnetId property identifies the subnet on which
the device resides. This property can be used in conjunction
with the NodeId property to uniquely identify a device.
Availability
Local, full, and lightweight clients.
Syntax
returnValue = object.SubnetId
Element
Description
returnValue
The subnet ID of the device.
object
The SourceAddress to be acted on.
Data Type
Integer.
Read/Write
Read only.
Added to API
Prior to LNS Release 3.0.
Subnet
The Subnet object represents a single instance of a subnet. Subnets are the second
component of the three-component LonTalk addressing hierarchy of domain/subnet/node ID.
The subnet address is the level at which routers decide whether to forward a packet;
therefore, the same subnet cannot appear on both sides of a configured or learning router.
Subnets are typically added automatically when routers or devices are added. In most cases
there is no reason for your application to manually allocate subnets. Subnets can be
explicitly added using the Add method of the System object's Subnets collection. This allows
an OpenLNS application to force a given set of devices onto the same subnet by specifying
that subnet when adding the device, or by subsequently moving the device to another subnet
with the MoveEx method. This will allow your application to take advantage of subnet
broadcast messaging.
The following table summarizes the Subnet object.
Description
Represents a single instance of a subnet.
Added to API
Prior to LNS Release 3.0.
Accessed Through
Subnets collection object.
Default Property
Name.
Methods
None.
Properties
• BitmapFilePath
• ClassId
• Description
• DomainId
• Extensions
• IconFilePath
• Name
• Parent
• SubnetId