Echelon LNS - Manual (Page 148)

LNS Programmer's Guide 134
automatically. However, you may need to manually replace your Network Service Device
in some cases. You will need to use the PreReplace() method to do so.
For example, you will need to use this method if you open a network remotely from a new
PC, and want that client to use the Network Service Device configuration that was
previously associated with another remote client PC (effectively moving the remote
application and Network Service Device configuration from one PC to another). An
exception to this is if the original remote client used a standard network interface, and
you move the network interface to the new PC as well. In this case, LNS will
automatically associate the new PC with the original client based on the standard
network interface’s Neuron ID.
You will also need to follow the procedure described below to reattach a Network Service
Device to a network if the network has been removed from the RemoteNetworks
collection for the PC, and you are using a high-performance (Layer 2/VNI) network
interface, or if you install a new network interface on the PC.
To re-associate a client with the correct Network Service Device and re-attach the client
to the network, follow these steps:
1. Get the Network Service Device to be attached to from the
NetworkServiceDevices collection.
Dim MyNSD as LcaNetworkServiceDevice
Set MyNSD = MyNetworkServiceDevices.Item(“Supervisor Room”)
2. Call PreReplace() on the network you want to attach your application to, with the
selected Network Service Device as the sourceNSD element.
MyNetwork.PreReplace(MyNSD)
3. Close the network, and release all references to the network.
MyNetwork.Close()
4. Call Replace() on the network.
MyNetwork.Replace()
5. Call Open() on the network to open the network with all previously created monitor
sets present.
MyNetwork.Open()
Upgrading Devices
When a device has a new application loaded, or when a device is replaced, the device's
external interface may change. You can call the Upgrade() method to upgrade the
device to be compatible with the updated the external interface with minimal disruption
to existing connections and configuration. You can use the Upgrade() method on all
device types. However, it generally only makes sense to upgrade a device to support
functionality similar to the device’s original purpose (e.g. to upgrade to a later version of
the device).
To upgrade a device, follow these steps: