Echelon LNS - Manual (Page 164)

LNS Programmer's Guide 150
Property Description
BroadcastOptions This property determines whether LNS will use group or
broadcast addressing. You should note that when using
group addressing, there are 256 distinct groups per
network, and the group addresses consume address table
entries in both the receiving and transmitting devices
involved in the connection. Most application devices are
limited to 15 address table entries, and Network Service
Devices that use standard network interfaces are limited to
15 address table entries for use with group addressing.
Network Service Devices that use high performance
network interfaces support up to 256 address table entries.
Broadcast addressing cannot be used with the
acknowledged or request messaging services. In addition,
domain broadcasting cannot be used with the
unacknowledged/repeat messaging service. When LNS uses
broadcast addressing, it uses subnet broadcast if all
addressed devices are in the same subnet. Otherwise, it
uses domain broadcast addressing. You can set the service
type for a connection by writing to the ServiceType
property. Broadcasting with network variables applies only
to outputs.
The next section of this document, Optimizing Connection
Resources, includes a discussion of when and how you
should use broadcast addressing.
ReceiveTimer
RepeatTimer
TransmitTimer
The default values for these properties are determined
based on the network topology. Echelon recommends that
you do not change these properties from their default
values. If the default values for these properties are not
suitable for your application and you need to change them,
Echelon recommends that you use the Delay property of
each Channel object the connection is using to ensure that
each message is sent at the correct interval. The Delay
property allows your application to specify the number of
milliseconds expected to send a message and receive an
acknowledgment on the specified channel, so that
automatic timer calculations made by LNS can be affected
accordingly.
These properties accept a range of encoded values from 0 to
15. You can also write the value 254 to the property at any
time to restore it to the default. See the LNS Object Server
Reference help file for more information on these properties,
and for the actual values that correspond to each encoded
value.
RepeatCount
RetryCount
The default values for these properties are determined
based on the network topology. They each accept a range of
0-15.