Solution:

Please refer to the attached file for further detail information. DDE Application/Server Name : ADAM DDE Topic Name : must the same as TOPIC name Besides, the DDE Access name is not so critical, you can naming it as any sensible name. "AI0" for read analog input data from channel "0". "AI1" for channel "1". (Please refer to page 21 of the "InTouch for ADAM-4000 Series I/O DDE Server User's Guide")