Echelon LNS DDE Server - Manual (Page 133)

9. Double-click the tag name in the Expression: edit box to see how this tag is
defined. The following Tagname Dictionary dialog opens:
Click the Type button to the right of the Tagname to see the first key piece of
information that is required to define the tag. In this case the tag is defined
as an I/O Message. Once a tag is assigned a type (Discrete, Integer, Real,
or Message), it will remain restricted to these foundation types. The first
time a tag is defined, you can select from all the tag types that are supported
by InTouch.
10. The second key piece of information that is needed to connect an I/O tag to
the LNS DDE Server is the Access Name. InTouch uses Access Names to
define the Application and Topic portions of a DDE link. In this case we have
defined the Access Name as LNS5LMNV. Click the Access Name button to
show the following dialog:
These names were defined using the following convention: LNS#<Topic
Type>. LNS is a shortened version of the application name, the # is the
LNS DDE Server User’s Guide C-7