Echelon OpenLNS - Manual (Page 759)

OpenLNS Programmer's Reference 722
OnNvMonitorPointUpdateEvent
Summary This event is generated whenever a network variable monitor
point update is received .
If you are using a programming environment which supports
multi-threading (such as Visual C++), you can receive update
events on a separate thread by creating an object which
implements the ILcaMsgMonitorPointListener interface.
Syntax OnNvMonitorPointUpdateEvent (nvMonitorPoint As Object,
DataPoint as Object, Src as Object)
Element Description
nvMonitorPoint The NvMonitorPoint object that
received an update.
DataPoint A DataPoint object containing the
received value.
The DataPoint parameter's
AutoRead property is set to TRUE.
Src A SourceAddress object indicating
the source device of the update.
Added to API LNS Release 3.0.
OnNVUpdateError
Summary This event is generated whenever a monitored network
variable update fails . This error occurs when the Data Server
gets a network error when it attempts the get the value of a
network variable which is being monitored.
Syntax OnNvUpdateError(monitorTag As Long, dsError as Long)
Element Description
monitorTag The monitor tag of the network
variable which had an update
failure.
dsError The type of update failure. This
element will always have a value of
200 (network error).
Added to API LNS Release 3.0.
OnSessionChangeEvent
Summary This event is generated whenever the state of an xDriver
session changes, or whenever the state of your client’s
NetworkServiceDevice changes .
This event will then be fired each time the state of an xDriver
session your client application is handling changes, including
when the session is disconnected for any reason.