Echelon LNS DDE Server - Manual (Page 104)

Example 1:
Application
LNSDDE
Topic AppMsg Test.subsystem 1.MT
Item msg_in –t SNVT_count
Example 2:
Application
LNSDDE
Topic AppMsg Test.subsystem 1.MT
Item switch.msg_in
Example 3:
Application
LNSDDE
Topic AppMsg Test.subsystem 1.MT
Item switch.msg_in.1
See Requesting a One-Time Update in Excel and Requesting a One-Time Using
InTouch in Chapter 5, for a description of how to request a one-time update.
7-12 Receiving and Sending Application Messages