Echelon LNS - Manual (Page 220)

LNS Programmer's Guide 206
Property Name Description
ServiceType This property determines the default messaging service
to use when explicitly writing the network variable
monitor point. This does not apply to polling or implicit
or explicit bound monitoring.
Setting this property through the NvOptions property of
a permanent monitor set, or through the
DefaultOptions property of a permanent network
variable monitor point, does not have an effect. The
default messaging service for each permanent network
variable monitor point is established by the
ServiceType property of the ConnectDescTemplate
specified when the network variable monitor point was
created.
You cannot set this property through the
DefaultOptions property of a temporary network
variable monitor point, as the DefaultOptions
properties of all temporary monitor points are not
accessible. However, you can set this property through
the NvOptions property of a temporary monitor set to
determine the default messaging service that will be
applied to all network variable monitor points as they
are added to the set.
Remember that you can set this property through the
CurrentOptions property of a permanent or temporary
network variable monitor point to determine messaging
service to use when sending network variable updates
during the current monitoring session.
Default Value: For permanent monitor sets, the default
value for this property is the acknowledged message
service. The default value for temporary monitor sets is
set to match the value of the DsService property.