Echelon LNS - Manual (Page 77)

LNS Programmer's Guide 63
5. For Full client applications, set the System object’s RemoteChannel
property to the Channel object corresponding to the remote PCs channel.
You do not need to perform this step if you are running a Local or
Lightweight client application, if the system only contains one channel, or
if the system contains multiple channels and only uses configured
routers, bridges or physical repeaters. This step is only necessary for
remote Full client applications attached to multiple channel networks
containing store and forward repeaters.
For those client applications that do require this step, it is important to
note that the Network object’s Channels property is not valid until the
System has been opened. As a result, since the System object’s
RemoteChannel property must be set before the System is opened, you
must pre-open the System to obtain the desired channel, set the
RemoteChannel property, and then re-open the System. This is
demonstrated in the following example:
Dim MyChannels as LcaChannels
’ Pre-open the system:
MySystem.Open()
’ Fetch and assign the desired channel
Set MyChannels = MyNetwork.Channels
’ Set the RemoteChannel property
Set MySystem.RemoteChannel = MyChannels.Item(“C2”)
6. Invoke the System object’s Open() method to open the System (or re-
open the system, if you set the RemoteChannel property in step 5).
MySystem.Open()
Setting System Parameters
System parameters are represented as properties of the System object. You should set
some of these properties before opening the System object, as described in the previous
section. You should set other key properties of the System object after you have opened
it, as follows:
1. MgmtMode Property. This property sets the system management mode,
which determines whether device configuration changes are propagated
to the devices (lcaMgmtModePropagateConfigUpdates) on the
network as they are applied to the LNS database, or saved for later
processing (lcaMgmtModeDeferConfigUpdates). For a new network,
the default setting is lcaMgmtModeDeferConfigUpdates. If you are
opening an existing network, this setting may have been changed by
another LNS application.
While the system management mode is set to
lcaMgmtModeDeferConfigUpdates, changes are stored in the LNS
database. They are automatically propagated to the network as soon as
the system management mode is changed back to
lcaMgmtModePropagateConfigUpdates. While the system