Specifications

RSLinx – Training Guide 45
AdvanceDDE
In addition to supporting CF_Text and XL_Table, Rockwell Software has also
implemented its own DDE data format. This format is called AdvanceDDE
(also known as PackedDDE).
AdvanceDDE is specifically designed for industrial communications giving the
communications increased data throughput and well defined error checking to ensure
data communications integrity.
AdvanceDDE’s speed performance is accomplished in numerous ways. Among these, it
allows for the binary transfer of data (thus there is no performance penalty for
converting numeric binary data to text and back again). It also packetizes data to allow
multiple data items per message (instead of one as in CF_Text).
All Rockwell Software Products can understand AdvanceDDE allowing for fast and
accurate DDE communications.