Echelon OpenLNS - Manual (Page 496)

OpenLNS Programmer's Reference 459
MessageTags
A MessageTags object is a collection of MessageTag objects. Note that the Interface object
contains two MessageTags collections:
1. The MessageTags collections accessed through the MessageTags property, which contains
the interface’s static message tags.
2. The MessageTags collections accessed through the DynamicMessageTags property, which
contains the interface’s dynamic message tags.
The following table summarizes the MessageTags object.
Description A collection of MessageTag objects.
Added to API Prior to LNS Release 3.0.
Accessed Through Connections object.
Interface object.
Default Property Item
Methods • Add
• Remove
Properties • ClassId
• Count
• Item
• Parent
• _NewEnum
Methods
The MessageTags object contains the following methods .
• Add
• Remove
Add
Summary This method allows you to add message tags to any device
that supports monitor sets, and use those message tags to
send explicit messages from that device to a group of devices,
as with static message tags. For example, consider the case of
a NetworkServiceDevice . Network Service Devices do not
contain static message tags. However, you can use this
method to add dynamic message tags to the AppDevice object
that represents a NetworkServiceDevice . Once you have done
so, you could connect the message tag to the devices you want
to send messages to. Following that, you could create a
permanent message monitor point on the
NetworkServiceDevice that specifies the new dynamic
message tag as the monitor target. You could then open the
monitor set, and use the message monitor point to send
explicit messages from the NetworkServiceDevice to any
number of devices on your network.
The procedure to follow when connecting message tags and