DDE/OPC client connectivity
RSLinx Classic provides connectivity for client applications using OPC or multiple DDE data formats. The OPC and AdvanceDDE interfaces provide optimized read operations by packing multiple requests from multiple clients in a single transaction. In configuring a DDE Topic, you can specify whether or not you want DDE poke operations optimized.
TIP:
Optimized pokes only work with PLC-5 and SLC processors.
The benefit of optimizing DDE poke operations is packing multiple updates in a single write operation, thus reducing the overall number of packets required. Operations such as downloading a recipe can take advantage of this feature.
Other DDE formats supported include FastDDE (for Wonderware clients), XL_Table and CF_Text to support Microsoft Office products, and other generic DDE client applications.
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